|
12/24 |
2013/10/24-11/21 [Computer/SW/Unix] UID:54749 Activity:nil |
9/18 ------------------------- < Less wine, more sudo. > ------------------------- \ ^__^ \ (oo)\_______ (__)\ )\/\ ||----w | || || |
12/24 |
2013/4/30-5/10 [Computer/SW/Unix] UID:54666 Activity:nil |
4/30 17:34 <xxx@xxx02:~ $ > uptime 17:34:40 up 19:10, 2 users, load average: 1117.31, 1106.06, 1074.05 |
2013/3/24-5/18 [Computer/SW/Unix] UID:54638 Activity:nil |
3/24 How are people transferring large files to one other person these days? When I need to send some videos to my parents, I upload them to my SpiderOak account, but they don't have anything like that, so I'm not sure how to get videos from them. Does DropBox do this for free? \_ DropBox + \_ ftp upload to soda, http download from soda, delete file on soda. \_ USB Thumbdrive \_ files? are we in 1990? everyone uses YouTube. You can even set them to be private. If you want convenience, use Picasaweb. My goodness, I didn't know people still transferred files. \_ It might not seem to be a good idea to pass on family memories to later generations in the form of a YouTube link. \_ It might not be a good idea to pass on family memories to later generations in the form of a YouTube link. |
2012/9/24-11/7 [Computer/SW/Languages, Computer/SW/Unix] UID:54484 Activity:nil |
9/24 How come changing my shell using ldapmodify (chsh doesn't work) doesn't work either? ldapsearch and getent show the new shell but I still get the old shell on login. \_ Scratch that, it magically took my new shell now. WTF? \_ probably nscd(8) |
2012/9/20-11/7 [Computer/SW/Unix, Finance/Investment] UID:54482 Activity:nil |
9/20 How do I change my shell? chsh says "Cannot change ID to root." \_ /usr/bin/chsh does not have the SUID permission set. Without being set, it does not successfully change a user's shell. Typical newbie sys admin (on soda) \_ Actually, it does: -rwsr-xr-x 1 root root 37552 Feb 15 2011 /usr/bin/chsh |
2012/8/30-11/7 [Computer/SW/Apps, Computer/SW/Unix] UID:54470 Activity:nil |
8/30 Is wall just dead? The wallall command dies for me, muttering something about /var/wall/ttys not existing. \_ its seen a great drop in usage, though it seems mostly functional. -ERic \_ Couldn't open wall log!: Bad file descriptor Could not open wall subscription directory /var/wall/ttys: No such file or directory \_ In theory, wall could be used as a sort of irc system, but maybe it's just fallen apart. Could not open wall subscription directory /var/wall/ttys: No such file or directory \_ In theory, wall could be used as a sort of irc system, but maybe it's just fallen apart. |
2012/7/11-8/19 [Computer/SW/Apps/Media, Computer/SW/Unix] UID:54435 Activity:nil |
7/11 Story of the first image on the web: http://preview.tinyurl.com/cwf2ld2 [motherboard.vice.com] \_ It might be the first image available via HTTP all right, but people have been downloading GIF's via FTP long before that. I still remember files like sigirl5.gif and dadygirl.gif back in 1990. (NSFW, of course.) \_ Remember SFTP? \_ Yeah, and? -- PP |
2012/7/2-8/19 [Computer/SW/Unix] UID:54429 Activity:nil |
7/2 If I download a software that has GNU GPL and create a search engine on top of it and the search engine profits (and I don't release the source code nor do I modify or redistribute it), is that an acceptable use of GNU GPL? \_ Yes. Even the AGPL allows this if you don't modify the program. \_ What if I'm a search engine that uses something that uses GNU GPL and I modify it for the company's infrastructure like Borg or GFE or BigTable but never release it to the world, is that acceptable use? \_ Yes. http://gnu.org/licenses/gpl-faq#GPLRequireSourcePostedPublic |
2012/5/8-6/4 [Computer/SW/Unix] UID:54383 Activity:nil |
5/8 Hello everyone! This is Josh Hawn, CSUA Tech VP for Spring 2012. About 2 weeks ago, someone brought to my attention that our script to periodically merge /etc/motd.public into /etc/motd wasn't running. When I looked into it, the cron daemon was running, but there hadn't been any root activity in the log since April 7th. I looked into it for a while, but got lost in other things I was working on (Studying for finals and what-not). Anyway, I decided to look into it again today and just restarted the crond daemon using: `/etc/init.d/cron restart` And it seems to be working now. Sorry for the inconvenience. I should have noticed that I wasn't getting any cron daemon emails from soda for so long. Please continue to enjoy using motd. Sorry for the service interruption. \_ Thank you Josh! Are you guys still giving out awesome @csua.berkeley.edu mailing addresses so that future alum like yourself can enjoy perks like Amazon Prime for students? \_ I was able to use this account to sign up for FB before the masses, what other perks have you seen? \_ Ah that'd explain why my (cron based) motd archiver was broken too. -ERic |
2012/4/27-6/4 [Computer/SW/Languages/Misc, Computer/SW/Unix] UID:54372 Activity:nil |
4/27 I wrote a little shell script to collect iostat data: #!/bin/bash DATE=`date +%m%d` DATADIR=/var/tmp/user OUTPUTFILE=$DATADIR/$DATE.out while true do date; /usr/bin/iostat -x 1 > $OUTPUTFILE done Is there a better way to do this? Open source tool perhaps? \_ It's the easiest way. If you want to go fancy, Graphite is pretty nice for app level stuff. \_ Wow, this Graphite? http://graphite.wikidot.com Do you have it installed? |
2012/2/9-3/26 [Computer/SW/Security, Computer/SW/Unix] UID:54305 Activity:nil |
2/9 Reminder: support for mail services has been deprecated for *several years*. Mail forwarding, specifically .forward mail forwarding, is officially supported and was never deprecated. \_ There is no .forward under ~root. How do we mail root and how do we get responses? \_ root@csua.berkeley.edu is and always has been an alias. root@csua.org will reach rootstaff when csua.b.e is down, and is the preferred contact. \_ Why is there still a 1.4TB volume mounted on /var/mail? \_ Because it's currently slightly less work to leave it as-is than to figure out how to migrate cleanly and smoothly. Email isn't something you just switch off one day. \_ I don't think I ever saw an announcement on this. Anyone have a copy for the rest of us to read? \_ http://preview.tinyurl.com/7bghw8h -ausman |
2012/1/27-3/26 [Computer/SW/Unix] UID:54299 Activity:nil |
1/27 Interesting list of useful unix tools. Shout out to cowsay even! http://www.stumbleupon.com/su/3428AB/kkovacs.eu/cool-but-obscure-unix-tools \_ This is nice. Thanks. |
2011/11/20-2012/2/6 [Computer/Companies/Apple, Computer/SW/Unix] UID:54237 Activity:nil |
11/20 Are there tools that can justify a chunk of plain ASCII text by replacing words with words of similar meaning and inserting/removing commas into the text? I received a 40-line plain text mail where all the lines are justified on left and right. Every word and comma is followed by only one space, and every period is followed by two spaces. The guy is my kid's karate instructor which I don't think is a computer guy. The mail header reads "X-Mailer: Apple Mail (2.936)" which I don't think does this either. Thx. \_ This is sort of uberkerning, which is probably beyond the ability of machines. Are you sure he didn't just do it by hand? How long is the message? \_ I don't know if he did it by hand, but who would manually do such a thing? (I've shot mail to him asking about it and am waiting for a reply.) The text is 40 lines. I saved the whole text in /tmp/justified_mail.txt. \_ Ummm, OCD perhaps? This is pretty odd, thanks for sharing. \_ Maybe he used groff? Looks kind of like a manpage. \_ Got words from the sender. It turns out that he indeed did it by hand. Amazing. Thanks for all the responses. \_ can you ask him if he has OCD? Does he like Star Trek? |
2011/11/2-8 [Computer/SW/Languages/Perl, Computer/SW/Unix] UID:54208 Activity:nil |
11/2 Celebrating fifty days of uptime! 00:16:58 up 50 days, 19 min, 13 users, load average: 1.00, 1.00, 1.00 \_ Thanks, jordan! \_ I would bitch about the 1, but it is not like anyone else is trying to do anything resource intensive with soda. \_ The culprit: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 25757 edilaic 20 0 32088 4284 2052 R 100 0.1 21565:48 perl \_ Yeah I saw that too, but it is not like he is slowing anyone else down. This is some kind of irc bot, right? \_ rodney on irc.csua/#hosers -- it announces nethack deaths. |
2011/10/26-12/6 [Computer/SW/Unix] UID:54202 Activity:nil |
10/24 What's an easy way to see if say column 3 of a file matches a list of expressions in a file? Basically I want to combine "grep -f <file>" to store the patterns and awk's $3 ~ /(AAA|BBB|CCC)/ ... I realize I can do this with "egrep -f " and use regexp instead of strings, but was wondering if there was some magic way to do this. \_ UNIX has no magic. Make a shell script to produce the ask or egrep you're looking for and there's your wizardry right there. \- re: magic: there are sometimes (relatively) obscure commands which do something slightly more painful to do with lower level tools, e.g. comm, jot, paste, join, tac, sort -M. I didnt know about 'grep -L' until maybe 5yrs ago, and would figure out how to do that in (relatively) painful ways. |
2011/9/14-21 [Computer/SW/Unix] UID:54174 Activity:nil |
9/13 Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. |
2011/9/14-12/28 [Computer/SW/Unix] UID:54172 Activity:nil |
9/12 We've restored CSUA NFS to something vaguely resembling normal functionality -- plus, with some luck, we should now have something vaguely resembling normal uptime, too! Ping root@csua.org if you notice any problems. --jordan -------------------------------------------------------------------------------- \_ Oh, and http://irc.CSUA.Berkeley.EDU is online again. -------------------------------------------------------------------------------- |
2011/4/27-7/30 [Computer/SW/Security, Computer/SW/Unix] UID:54096 Activity:nil |
4/28 Will wall be fixed? - jsl \_ What's wall? \_ An anachronism from a bygone era, when computers were hard to comeby, the dorms didn't have net, there was no airbears, and when phones didn't come standard with twitter or sms. \_ A non useful implementation of twitter. \_ Much like twitter itself \_ Sounds like your peer group doesn't use twitter. \_ Twitter isn't as interactive as wall was; it's micro-blogging, not chat. And most of it sucks. #likethetagsforexample -tom \_ Some groups get really chatty, and being able to use it over mobile devices is really useful for on the spot hive-mind decisions. (where are we going to eat now? what bar are we meeting at, what did we change our minds about eating etc). My only complaint is that long links are almost always shortened, so be careful what you click on (but that's pretty much the web these days). Clearly YMMV based on your circle, as with all "groupware". \_ AGAIN, we don't know *how* to fix it, because no current student and no or few alumni for several years have ever used it regularly. If you want it fixed, we're willing to do it, but nut up and offer your help. Sorry, I've had a bad day. --toulouse (I'm on root) \_ I'd rather you guys focus time on providing non-duplicable services to the UCB _undergrad_ community at large (eg, focus on usenet, actual student help, etc) than attempt to reimplement functionality that is done do death by a Free Web App like twitter (or any of the social nets out there). And again thanks for keeping soda up and around. \_ can you post the root password on motd please? Thanks. \_ vahmifqy -- you're welcome \_ Is this all it takes? I did one of the last major rewrites of 'wall', I think all that is broken right now is its logging and log rotation -ERic (mehlhaff) |
2011/4/6-20 [Computer/SW/Mail, Computer/SW/Unix, Industry/Startup] UID:54078 Activity:nil |
4/6 My company is evaluating version control systems. Our two candidates are Perforce and Subversion. Anyone worked with both and have good arguments one way or the other? (These are the only two options we have.) We're most interested in client performance, ease of use, and reasonable branching. \_ I'll be 'that guy'. If perforce and subversion are optins, why isn't git? Having not used perforce, I can't say much about it, but svn is grossly insufficient for my branching and checkpointing needs. I cannot use svn anymore without git-svn. \_ svn+trac = nice. git-svn+trac = OH THE HORROR. \_ Corporate standards. (Yes, it's a stupid reason.) -op \_ In what way is svn insufficient for your branching needs? All of the claims I see about svn not supporting branching well predate the merge support added in svn 1.5. I've not used svn and so am not able to tell to what extent that merge support works. \_ I have used P4win and the mods P4py and what not. I thought they wre great at core focus, but lousy at being customizeable. You will probably go with Perforce tho since the app looks nice on winboxen. git for windows is knida amateur looking. \_ There is also P4-Emacs at http://p4el.sourceforge.net which I've used for a few years. -- yuen \_ State your eng size. This will be one of the most decisive factors. Perforce for 5 employees? FORGET IT. Subversion for 1000 employees? FORGET IT. \_ Try bugzilla on 1000 employees. Ugh. the horror. I've used p4, svn, and git. All have advantages and disadvantages. Use the wrong tool for the wrong size, you'll be bitching all the way. What people don't realize is that there is something else much more important than what you use-- a code-review process. \_ We are a group of about 50 developers right now, with plans to expand in the coming years and to manage more of our internal tools through version control. We do code reviews, although we're currently re-evaluating our tool choices there as well. Our options are Crucible and Code Collaborator. -op \_ Go with SVN. You sound like small shop. |
2011/2/18-4/20 [Computer/SW/Unix] UID:54044 Activity:nil |
2/18 Why does the system seem so sluggish lately? \_ Slow NFS is basically always the answer. --toulouse \_ Any truth to the rumor that soda will be decommissioned this summer? \_ Absolutely none. Soda might go down temporarily while disks are reorganized and stuff so soda doesn't suffer from such shitty performance nearly as much, but no, we've gotta maintain NFS and mail anyways, so there's no sense in shutting soda down. --toulouse \_ Cool. \_ I thought you guys were proposing moving soda offa nfs and removing mail except for .forwards? \_ Correct. Soda would be moved off of NFS. We still need NFS for other things though. And 'removing mail except for .forwards' still constitutes a maintenance effort wrt/ keeping things running. --toulouse \_ To clarify - this is what is proposed. Receiving mail on CSUA systems (as opposed to forwarding it from CSUA-> whatever your .forward specifies) is merely deprecated. --toulouse |
2011/2/14-4/20 [Computer/SW/Unix] UID:54039 Activity:nil |
2/14 You sure soda isn't running windows in disguise? It would explain the uptimes. \_ hardly, My winbox stays up longer. \_ Nobody cares about uptime anymore brother, that's what web2.0 has taught us. Everything is "stateless". \_ You;d think gamers would care more about uptime. \_ why do you think i suggested they run a private wow server on the side, it would give them impetus to care about stability \_ Seriously?! Have you ever browsed web 2.0 sites without cookies? \_ This ploy to confuse state-passed-into-client vs state-kept -by-server in a discussion about _server_ issues has been ignored. lern2troll plz. \_ Seriously? You are confusing client and server? \_ Soda is not the problem. NFS is. We mount NFS from an OpenSolaris box hosting ZFS. We don't have the money to get a proper filer to get stuff running smoothly, so we're thinking of moving user data local to soda so that the NFS server, which is slightly incompatible or something, and prone to shitting bricks, won't be such a problem. However, the people capable of doing this, as well as the possibility of downtime of services such as usenetwhich we provide to the campus, means this'll have to happen at the end of the semester (May/June). Also a problem is that the CSUA doesn't have a whole lot of IPs, so we bottleneck through a server which will cut off access to most other services if it goes down, as it uses pf to direct traffic on certain ports to certain internal VMs with only internal IPs. --toulouse \_ OpenSolaris; is that in danger of going away? I thought oracle end of life'd it? \_ P.S. We care about the uptime that students and professors rely on. Please don't paint us as being careless and incapable. --toulouse \_ I don't have OpenSolaris experience but I've used ZFS on FreeBSD for a file server, and it's been very reliable. --jwm \_ So did we. If you ever have heavy load under multiple users, brace yourself for frequent kernel panics. Also, FreeBSD ZFS is ages behind OpenSolaris's, though TBH with Oracle eating Sun, added to our issues with our disk server's uptime, OpenSolaris and ZFS as a whole aren't looking all that attractive for continued use. --toulouse \_ FreeBSD's ZFS does lag behind, but it's plenty functional for what I've done. I can give up some of the new functionality to have stability. --jwm \_ No, no, what I was saying is that under load, FreeBSD's crashed *a lot* when we were running NFS+ZFS on it. Not that OpenSolaris has been a party either, but I personally don't think that NFS+ZFS is a winning combo for stability if you're looking for a free solution. P.S. your tabs are wrong. Note the locations of tabs. --toulouse \_ If FreeBSD crashes that means you aren't running the quality hardware. \_ I doubt that. I don't remember the details but I think this also happened in VMs? In any case, if we could get good hardware a filer would be nice. --toulouse \_ Among other implementations (including Netapp) I run NFS on a Thumper using ZFS and it is very stable with 150 users who are actuall doing things. I think something is wrong with your hardware or your config. \_ That may very well be so. But the only one who maintained our ZFS+NFS setup seriously graduated a while ago, and there's not a lot of interest in maintaining a finicky setup in the absence of time and money, when that time could be used more effectively on class and other stuff. --t |
2010/12/13-2011/2/19 [Computer/SW/Unix] UID:53978 Activity:nil |
12/21 Help, all my files are owned by nobody! -ausman (yes I emailed root) \_ Things should be fine now. As usual, the NFS server caused a cascade of errors. |
2010/11/18-2011/1/13 [Computer/SW/Security, Computer/SW/Unix] UID:53990 Activity:nil |
11/18 ncurses header files are missing.. \_ Installed. FYI I find it rude that you wouldn't bother to mail root and instead complain here, perhaps hoping that someone with root might check. I might not have root forever, you know, and I don't think many root staff typically check here. --toulouse P.S. the specific library installed was libncurses5-dev. If you ask for something else please do it through root@csua. |
2010/8/9-19 [Computer/SW/Security, Computer/SW/Unix] UID:53915 Activity:nil |
8/9 Who is this guy 42949672? Posted some root's processes for context. 751 root 15 -5 0 0 0 S 1 0.0 0:24.50 rpciod/0 5293 42949672 20 0 20412 908 576 S 0 0.0 0:18.82 nrpe 1 root 20 0 10312 748 620 S 0 0.0 0:08.75 init \_ Sounds like -1 (a truncated 4294967295). |
2010/5/17-6/11 [Science/GlobalWarming, Computer/SW/Unix] UID:53828 Activity:nil |
5/18 did somebody say tar ball? http://www.huffingtonpost.com/2010/05/17/tar-balls-key-west_n_579660.html anyone else wishing we could just gzip these? |
2010/5/4-26 [Computer/SW/Unix] UID:53816 Activity:nil |
5/3 Is it possible to bzip2 on the fly? Like: % dump_stuff | bzip2 -stdin > dump_file.bz2 \_ Yup, it works fine. You don't even need a flag: % dump_stuff | bzip2 > dump_file.bz2 \_ whoa, why didn't anyone tell me about this, and why is this not on the man page. I've been doing the stupid command for years: % mysqldump > f.sql; bzip2 f.sql \_ "If no file names are specified, bzip2 compresses from standard input to standard output." |
2010/3/8-30 [Computer/SW/Unix] UID:53745 Activity:nil |
3/8 I have a mod_rewrite question that I think should be straight- forward but I think I'm not getting something. I have a virtual server with some root, say /home/user/public_html/ and in there I have two subdirs, say /app1/ and /app2/ and i want the following: http://mysite/app1 --> /home/user/public_html/app1 http://mysite/(.* --> /home/user/public_html/app2/$1 so for ex, http://mysite/app2 --> /home/user/public_html/app2/app2 So anything that's not "app1" would map into the app2 subdir ... but I guess this causes an infinite loop in the processing? Since it just keeps prefixing /app2/ onto the path until it crashes? any advice? thx - \_ IIRC it matches in order. However, the way you have it, it looks like http://mysite/app1 or http://mysite/app1/(.* might not be matched by your first rule. Perhaps "http://mysite/app1(/.*)?" or something may work better (untested though, but you should get the idea) \_ ok sure you're right. But my main question is how to get the 2nd rule to work w/out generating an infinite loop. ie, http://mysite should go to home/user/public_html/app2/ http://mysite/foo should go to home/user/public_html/app2/foo http://mysite/app2 should go to home/user/public_html/app2/app2 etc, but w/out infinite loop. possible? thx \_ Oh, I see. You probably want http://mysite/app2 -> /home/user/public_html/app2/ as a separate rule, or perhaps... http://mysite/([^/]*)(/.*?) -> /home/user/public_html/app2/$1$2 ...maybe? I don't know why it would be rewriting it to a path on your filesystem...it's been a while, but I thought it rewrote URLs, not filesystem paths. I'm just guessing... \_ set your root to app2. then alias /app1. no mod_rewrite. \_ hurr durr that would make too much sense. D'oh. --!op |
2010/1/22-24 [Computer/SW/Unix] UID:53654 Activity:high |
1/22 What's the difference between a job and a career? \_ women have jobs, men have careers. \_ true statement but one that is sexist and should be kept in a private conversation \_ A job could be anything that pays mortgage or feed the mouth. A career is something that is longer term, most of the time, something you do out of choice. People who clean toilets have a job. People who have a chance to climb corporate ladders have a career. \_ Most people have only one career path in their whole lifetime. Few people have two or more. Most people have several jobs in their lifetime. For example, a person can have jobs and careers like these: Job 1: software engineer Job 2: senior software engineer Job 3: flipping burgers at McDonald's because he got laid off at #2. Job 4: software architect Job 5: flipping burgers at McDonald's because now he likes flipping burgers Job 6: supervisor at McDonald's Job 7: Owner of a McDonald's restaurant. That translates to Career 1: software engineering (Jobs 1-4) Career 2: fast food business (Jobs 5-7) Job 3 is not a career switch because he considered it a temporary job. |
2009/12/9-2010/1/13 [Computer/SW/Unix] UID:53586 Activity:nil |
12/8 Is there a bash equivalent to tcsh's history-search-backward ? \_ There's something similar called... history-search-backward. It is a bit more limited, in that it only searches for strings and not glob patterns. You may find reverse-i-search to be useful also. |
2009/11/13-30 [Computer/SW/Unix] UID:53523 Activity:nil |
11/12 How does one find out if a system has rootkit installed? \_ Unix or m$? \_ Unix. On M$ I always assume it's compromised. \_ Install Tripwire before you plug your server into The Net? The only other answer I can think of is to reinstall the OS from scratch on another server and do an md checksum comparison with your current binaries. You can also look for other signs of infection, like open ports that don't belong there (netstat -o), mysteriously growing filesystems, etc, but a really good rootkit is almost undetectable. Most of them aren't really good though. \_ ObKenThompson: http://cm.bell-labs.com/who/ken/trust.html |
2009/10/27-11/3 [Computer/SW/Unix] UID:53475 Activity:nil |
10/27 http://www.maxgames.com/play/flash-mind-reader.html how does this work? \_ sh -c 'for ((i=0;i<10;i++)); do for ((j=0;j<10;j++)); do echo "$i$j-(\ $i+$j)" | bc; done ; done' | uniq \_ bash -c 'for ((i=0;i<10;i++)); do for ((j=0;j<10;j++)); do echo "$i$j\ -($i+$j)" | bc; done ; done' | uniq \_ ksh -c 'for ((i=0;i<10;i++)); do for ((j=0;j<10;j++)); do echo "$i$j-\ ($i+$j)" | bc; done ; done' | uniq \_ fixd. above script only works if your sh is really bash. -Solaris Geek \_ sorry, I somehow lost the k. Also, works if your sh is ksh93 in opensolaris, etc. Not sure that putback has made it into s10u* \- i thought that was pretty clever presentation. thanks for sharing the link. |
2009/10/1-12 [Computer/SW/Unix] UID:53416 Activity:nil |
10/1 I typed man ls on soda and didn't get a man page. How can I fix this? \_ I have this line in my .cshrc: setenv MANPATH "/usr/man:/usr/local/man:/usr/X11/man:/csua/man:/usr/share/man" setenv MANPATH "/usr/man:/usr/local/man:/usr/X11/man:/csua/man: /usr/share/man" (I don't even remember whether it came with my account or I added it myself.) \_ it worked. thank you. |
2009/9/18-29 [Computer/SW/Security, Computer/SW/Unix, Finance/Investment] UID:53379 Activity:nil |
9/18 In Linux, is there a way for root to change the "nice" value of an existing process? thx. \_ Yes. man renice. |
2009/9/10-21 [Computer/SW/Security, Computer/SW/Unix] UID:53354 Activity:low |
9/10 Is there a web site out there that I can put in a URL and it comes back with an estimated monthly traffic, for free? I tried going to Comscore but I can't find it. \_ <DEAD>www.google.com/adplanner/planning/site_details#siteDetails?identifier=cnn.com&geo=US&trait_type=1&lp=false<DEAD> \_ check the differences between: http://gop.com and http://democrats.org \_ Do you know about Alexa? \_ Alexa charges an arm and a leg for detailed data. Fuck that \_ It is the best free summary stats I have found. Let me know if you find something better (that is free). \_ Yes. Google Ad Planner is free and BETTER. Check it out and let me know what you think. \_ Alexa is free, too, for basic info. The Google stuff looks interesting, but its UU info for where I work (CNET) is way off. Look at the daily unique user count and the monthy numbers. There is no way for this to add up. \_ http://www.quantcast.com or http://www.compete.com |
2009/9/5-12 [Computer/SW/Unix] UID:53337 Activity:nil |
9/5 Almost to 10 days uptime! Woo! \_ Back down to 10 hours... :( |
2009/8/21-9/1 [Computer/SW/Unix] UID:53297 Activity:nil |
8/20 When I use rsync to backup, it's pretty cool except in cases where I rename a directory name from the source. Rsync will just do a plain copy. Is there a program that'll detect renaming of directories (by checking for children files), or at least move them to a dated directory? \_ Not related but beware of using rsync as a backup tool. Consider using something like rsnapshots instead. \_ what's wrong with rsync? \_ Same reason why RAID is not a backup. If, out of user error, you delete a file then it's gone in both the original and the backup. Combine rsnapshots with rsync and you'll have a better backup solution. This way, you'll retain some history so you can recover files later on. \_ rsync has a --backup option to move unsync'ed files into a backup directory. Did you miss that? \_ try this: % sync --backup-dir=._090821 --suffix='' --delete -avrb \ --filter='merge /Users/username/.rsync-filter' \ src dest My rule in .rsync-filter excludes ._* names. This will move files into ._090821 so that dest==src \_ Huh? Use --delete to make an exact replica on the destination. \_ --delete will delete files that you may need later on, that's the point of a backup. Make sure to use --backup in conjunction with --delete. |
2009/8/19-9/1 [Computer/SW/Unix] UID:53285 Activity:nil |
8/18 Hi again, new freebsd guy here again, in bash I was able to go LD_LIBRARY_PATH=/opt/foo/lib ./runmyapp I managed to do this in tcsh by using setenv in a shell script that setenv's the lib path and then executes $1, just wondering if there was a way to do it in 1 line from the cmd line as in bash? Thanks, btw %2c or %3c worked. Freebsd, tcsh and vi forever! Go Bears! \_ env LD_LIBRARY_PATH=/opt/foo/lib ./runmyapp \_ aha! i was using that but with set instead of env, and once with setenv. I shoulda tried env, thanks!! |
2009/8/18-9/1 [Computer/SW/Unix] UID:53284 Activity:nil |
8/18 Is it possible to truncate your path name in your prompt in tcsh? Tsch veterans REPRESENT! I know this is how to do it in bash: # truncate path: returns $1 truncated to $2 chars, prefixed with ... truncate_path () { if [ -z "$1" -o -z "$2" ] then echo Usage: truncate_path path length return 1 fi if [ ${#1} -le $2 ] then echo $1 else local offset=$(( ${#1} - $2 + 3 )) echo "...${1:$offset:$2}" fi } But I'd rather use tcsh on my freebsd machine. Go Bill Joy and BEARS!! \_ %c2 |
2009/8/2-11 [Computer/SW/Unix] UID:53229 Activity:nil |
8/1 What keeps hapening to soda? load of O(1000) then crash? Is it still nfs, even past the new kernel we did just for nfs? \_ It's still NFS. Filer plz kthxbai. \_ Filer eliminates NFS? |
2009/7/28-9/24 [Computer/SW/Security, Computer/SW/Unix] UID:53215 Activity:nil |
7/28 Restored basic website functionality. I also killed user websites, because I think the new root staff had set up the website with a default config and were not aware they were enabled. Sorry if this causes inconvenience, hopefully they will be restored soon once the website is taken in hand. -mrauser |
2009/7/22-27 [Computer/SW/Unix] UID:53181 Activity:nil |
7/22 Why does everyone's 'mail last read' date say Jul 19th? even for people who don't log in (shell is safesorry)? Just wondering O mighty unix gurus. \_ Modification time change when it was copied to new soda. |
2009/7/8-16 [Computer/SW/OS/Linux, Computer/SW/Unix] UID:53124 Activity:nil |
7/7 what happened to our web presence? http://www.csua.berkeley.edu not working \_ That would be because we've yet to set them up afaik. Steven *does* have a job after all. The idea is that we want a separate computer mounting the web directories, so that if an exploit compromises the webserver, the shell server (soda) itself will be insulated from the attack. \_ That would be because we've yet to set them up afaik. Steven *does* have a job after all. The idea is that we want a separate computer mounting the web directories, so that if an exploit compromises the webserver, the shell server (soda) itself will be insulated from the attack. \_ Ideally I wouldn't be the only one doing this shit :-p --steven \_ understood. I can help out. What's the root password? \_ can you install Lift? Word in the radlab is that it's the new sexy hotness. http://liftweb.net \_ Not a debian package. Can you install it locally? |
2009/7/6-16 [Computer/SW/Unix] UID:53117 Activity:nil |
7/6 Soda is having nfs problems, sorry about the up/downtime. I'll be monitoring it and seeing if I can figure out why it keeps choking; but NFS is somewhat of a (broken) black box... :/ --steven |
2009/6/30-7/15 [Computer/HW/CPU, Computer/SW/Unix] UID:53101 Activity:nil |
6/30 Thanks very much for all the volunteer work on soda! Two questions: 1. When will HTTP be up again? \_ Probably not this week - 4th and all that. Next week? 2. There used to be a web page that describes the historical hardware for soda machine. What's the URL again? I forgot. \_ It's on the wiki now - http://wiki.csua.berkeley.edu/index.php/Hardware Not up to date with the most recent rev yet Thanks again. |
2009/6/24-7/3 [Computer/SW/OS/Linux, Computer/SW/Unix] UID:53082 Activity:nil |
6/24 Debian GNU/Linux 5.0 Ahoy there weary traveler - This is indeed the brand spanking new Soda. We'll be enabling logins again soon - just want to make sure all the infrastructure is in place and ready for everyone to hammer on it. Please direct questions to politburo@csua.berkeley.edu Best, CSUA Root Staff |
2009/5/31-6/4 [Computer/SW/Unix] UID:53061 Activity:nil |
5/30 What's the best way to convert BMP to PDF? I'm tired of a bunch of PC shareware that has limitations. I'd prefer UNIX way but don't know where to start, and Google hasn't been helpful. \_ Imagemagick ("convert"). -tom |
2009/5/7-14 [Computer/Networking, Computer/SW/Unix] UID:52962 Activity:nil |
5/7 What's a good reverse port forwarding for a PC(inside firewall) -> Unix, so that I can VNC into the Unix that gets forwarded to PC's VNC server? \_ http://micrux.net/?p=26 Syntax, to be executed from the PC behind firewall: % ssh -R 5900:127.0.0.1:5901 <destination_server> You can also use Putty, by going to Connections->SSH->Tunnels, and enter: Source port:5900 Destination:127.0.0.1:5901 Remote (not Local) and finally click on Add So the connectivity looks like this: PC --ssh--> FIREWALL --ssh--> destination_server And the resulting "virtual" connectivity: PC:5900 <--- destination_server:5901 With the "-R" argument the destination_server binds to port 5901 which will connect back to PC's port 5900. Hence, it's a "reverse" tunnel. Note that this can potentially open up a lot of problems for companies and is generally frowned upon by network administrators. Please use with care. \_ Thanks, this is super useful info in general. \_ I do this with inetd and netcat. Just put a line like this in /etc/inetd.conf, and reload inetd: 5900 stream tcp nowait nobody /bin/nc nc YOUR-PC 5900 You can also do it with ssh port forwarding (e.g. using PuTTY), but then you have to remember to keep your ssh connection open all the time. |
2009/5/6-9 [Computer/SW/Unix] UID:52953 Activity:nil |
5/6 When I finger my account, it says: New mail received Wed May 6 07:13 2009 (PDT) Unread since Mon May 4 08:43 2009 (PDT) Acutally I haven't accessed my mail for several months, why does finger say unread since 5/4? \_ stop fingering yourself \_ Pretty sure it says that for everyone. Finger says that because mail was catastrophically hosed this weekend and steven spent a great deal of time moving us over from exim4 to postfix, while preserving your mail. Also in doing so he moved NFS to NFS4 on our new disk server, so stability should be better in the short term and much better in the long term. --t |
2009/5/5-6 [Computer/SW/SpamAssassin, Computer/SW/Unix] UID:52948 Activity:moderate |
5/4 Is mail still down? I don't seem to be getting any and vermouth is unavailable. I saw a note saying it was down Sunday, but it's almost Tuesday now. \_ exim4 decided it wanted to just die. With the same config file and everything. Steven spent all weekend and a lot of yesterday migrating to a VM. A side effect is that NFS is now no longer on Keg, so crashy keg will no longer be a problem. There might still be a few hiccups with getting NFS4 working, though. At this point I believe we're just waiting for EECS to unblock the port on the firewall for the new machine doing mail. We're now using postfix. --t keg will no longer be a problem. There might still be a few hiccups with getting NFS4 working, though. At this point I believe we're just waiting for EECS to unblock the port on the firewall for the new machine doing mail. We're now using postfix. --t \_ damn, and I'm eager to start processing my 4500 spam messages. -ERic \_ well, clearly the email is still coming in. Its up to 4900 spams. -ERic \_ damn, and I'm eager to start processing my 4900 spam messages. -ERic \_ who fixed your 80 column issue? SODA is time-frozen, you know? |
2009/4/27-5/4 [Computer/SW/Unix] UID:52913 Activity:nil |
4/27 Git, Darcs, or Mecurial? \_ If you do not need and will not want anyone on Windows, Git is OK. I'm partial to Mercurial, since it's simple, and doesn't pollute my directories with .svn, it just has a top-level .hg directory. I hear darcs is good if you want to allow multiple people editing the same file, since you can merge different changes within a file. |
2009/4/18-23 [Computer/SW/Security, Computer/SW/Unix] UID:52870 Activity:nil |
4/17 To those who have a twitter account and also follow people: how do you use twitter to read others' tweets? do you just visit their individual pages or do you stay logged in and visit http://twitter.com/home ? Thanks. /home: indiv pages: . \_ aren't you supposed to receive updates on your cell phone? |
2009/4/7-13 [Computer/SW/Unix] UID:52814 Activity:low |
4/7 In unix version of irc (irssi), how do I scroll back chat buffer? \_ page up/page down doesn't work? also try alt a/p and /lastlog |
2009/3/8-17 [Computer/SW/Unix] UID:52685 Activity:kinda low |
3/8 I'm reading about an old exploit where someone used a buffer overflow in a printer daemon to get "daemon privileges," which allowed them to use another exploit on the mail delivery program to get root. I'm not sure what daemon privileges are. Is there some set of priveleges that most daemons run on that is higher than user but lower than root? What are they? I've never heard this before. \_ It used to be common to run daemons as a user named "daemon". The daemon account doesn't have any special privileges, but if all your daemons are running in a single account, anyone who breaks into the account gets access to all of them. Modern systems run each daemon as a separate user, so if you break into apache you only get access to the "www" account or whatever. \_ And to expound, usually these users like 'daemon' and 'apache' are given *less privilege* than a normal user - at least to the extent that is possible with UNIX permissions. For instance, they have no login shell. \_ Ok, thanks. So, I guess the idea here is that the mail delivery program was running as daemon, but hadn't dropped root permanently? \_ Probably the deal was that the mail daemon had a function which runs as root, but only allows programs running as daemon to access it. So once you can run arbitrary code as daemon, you can run the mail function as root. -tom |
2009/3/7-13 [Computer/SW/Security, Computer/SW/Unix] UID:52683 Activity:low |
3/6 Is http://www.cygwin.org a real site or a hoax? It looks different from http://www.cygwin.com and it doesn't mention the latter. Thx. \_ It looks like a mistake -- http://cygwin.org (without the "www") works, but http://www.cygwin.org gives you http://sourceware.org instead. \_ I dunno why there are no links to Cygwin 1.7 on that site. try this: http://cygwin.com/setup-1.7.exe |
2009/3/6-9 [Politics/Foreign/Asia/China, Computer/SW/Unix] UID:52678 Activity:nil 75%like:52689 |
3/6 Chinese UNIX Museum: http://www.boingboing.net/2009/03/06/biography-of-the-las.html |
2009/3/3-5 [Computer/SW/Security, Computer/SW/Unix] UID:52671 Activity:high |
3/3/9 Happy Square Root Day \_ This morning some guy on KCBS AM 740 was playing with this and said something like "if you take the square root of every number, they don't look so big anymore. For example, next week the square root of my age is just 8. And the square root of the $838 billion stimulus package is just $29 billion." No wonder American kids rank last in math among industrialized countries. \_ i think the sqrt of his iq is also 8. \_ Dude needs to go back to school, and age 8 seems like a good time to learn about square roots. \_ Huh? I don't see anything wrong with his statement. \_ sqrt(838e9) is about 915423. \_ I guess. sqrt(838) =~ 29. (Billion dollars) is the units. Depends on how you look at it. \_ Right, but you need to square root the units too, just like sqrt(10000 m^2) = 100 m. The answer is the same whether you consider the units to be m^2 or (10000 m^2) or whatever. \_ I understand this, but what is the square root of "2 dollars"? This is like asking what is the square root of "2 cows". The original statement said "square root of every number" and not "square root of every quantity". You could argue (correctly) that 838,000,000,000 is a number in itself and its root is not 29,000,000,000, but what about "838 cows"? What is the square root of a cow? I think the key number is 838 and not 838*(units). You have to be pretty pedantical to not realize that. \_ If your units are billions of dollars than your square root units of ~ 31622 * $^(1/2). sqrt (838) * sqrt (1,000,000,000) ~= 29 * 31622 ~= 915422 \_ 915422 *what*? Not dollars. \_ $^(1/2) Which is 1/31622 of (Billion $)^(1/2) \_ Exactly, which is nonsense. So ignore the units. \_ If you ignore the units you can turn it anything you want. Sqrt($838e9) = $838e9 if my units are "$838e9" and I've decided units are meaningless. \_ You have to use some common sense here. The square root of his age (64) is 8, not 8 (years)^1/2. \_ But by your logic we can make the units billions of years, and now the the square root of 64 is 252982. Better example: the square root of $1 is 1 if you are ignoring units, but the square root of 100 pennies is 10! 100 pennies = 1 dollar so how can those two be different. $1 = 100c sqrt($1) = sqrt(100c) 1 * $^(1/2) = 10 * c^(1/2) The difference is in the units. 1 c^(1/2) is, by definition, 1/10th of 1 $^(1/2). \_ But what is a sqrt($)? or a sqrt(cent)? \_ I guess you're right. Square rooting a number independently of its unit like this makes no sense, but it is what the original statement said, and really it doesn't sound like he was trying to make sense anyway. (FWIW, I think sqrt("2 cows") is meaningless too, unless you can come up with a meaning for 1.4 cow^(1/2).) \_ Depends on how good you are at math, actually. |
2009/2/26-3/5 [Computer/SW/Unix] UID:52653 Activity:nil |
2/26 If I want to rsync a perforce or svn directory while users are checking things in, could I wind up with a corrupted copy? \_ sure why not. if you are really cool, your copy of the svn repo is on LVM, and you snap the LVM to copy it. \_ It'll seem less cool when you realize you've taken a snapshot of a block level device, which only guarantees that this set of blocks is not changing. It doesn't guarantee you that the filesystem sitting on top of them is in a coherent state. What if you were in the middle of writing a file and had only written half of the blocks in that file when you took your block level snapshot? You're going to need to fsck it. Go up one *more* level to get to your source control system (and whether the set of files being written is part of this checkin or that). The poster below already mentioned perforce checkpoints. He's right. In subversion you probably want to make use of svnadmin hotcopy when backing up a repository while it's in use. \_ Yes, you could. Checkpoint the perforce depo first and then sync the checkpoints. There are other options, too. \_ I usually do this in Perforce: 1. Run "p4 changes" to find the latest changelist number at that moment. Say, 12345. 2. Run "p4 sync //...@12345". Other uses might be submitting or might have submitted new changelists, but that's okay. For #1, sometimes I instead get the last changelist of the previous day, or the last changelist before the last nightly build started. You can also do "p4 sync" by specifying a date and time. Of course, checkpoints or labels are cleaner ways, but my company doesn't use those. |
2009/2/10-13 [Computer/SW/Security, Computer/SW/Unix] UID:52552 Activity:nil |
2/10 I have an sh file that does a mount.. the mount does an authentication. I previosly stored the username and password from zenity prompts. However, I can't get a return on the password field. The following only works on the username: mount -t davfs "http://blahblah.com/BLahUser11" /mountdir << EOF ${username} ${password} EOF It gets stuck at the password. Any thoughts? thanks \_ Expect? \_ the username gets passed and a carriage return then a prompt for the password is there but the ${password} doesnt get put in nor carriage return. so script is stuck \_ /usr/bin/expect \_ can't use expect. this is an automated installer on other persons machines. I would have to apt-get expect No way to do it just with EOFs? \_ would "for i in 1; do echo $username; sleep 1; \ echo $password"; done | mount -t ..." work? It really depends on how the password is being read. \_ that didnt work... same behavior \_ No, this is one reason tools like Expect were invented. See, e.g., http://www.noah.org/wiki/Pexpect#Q:_Why_not_just_use_a_pipe_.28popen.28.29.29.3F \_ thanks.. i guess i have no choice :) excellent! \_ Well, that's not to say you couldn't make a very stripped down version of an expect-like tool that does what you want, and ship that. Maybe someone else has already done it. \_ or use Perl Expect or Python Expect. |
2009/1/25-29 [Computer/SW/Unix] UID:52456 Activity:low |
1/23 may the awesome rootstaff please apt-get install: colorgcc, colordiff, colormake thanks! \_ Done. In the future email such requests to root@csua for faster response \_ totally, understood. Altho yeah I do like asking for it here so people can see whatup, and even comment on the sw requests. \_ my burning eyeballs thank you. God. how did we live without color*, and grep -color? \_ 640x480 amber monochrome that's how. \_ i'm not a sysadmin. \_ Well Played. \_ Or apparently a very old programmer either. Punch cards, baby! \_ Seconded. "grep --color=always", where have you been my whole life? ok i just made an alias alias grep="grep --color=always $@" now how do i make it ignore the .svn stuff? \_ --color-auto is probably more What You Want (tm)... fix your termtype. as for the other part... try something along the lines of --exclude=\*.svn\* \_ I kind of like the post to the motd hey root thing. Now I know someone installed colorgcc, colordiff, colormake |
2009/1/20-26 [Computer/SW/Unix] UID:52420 Activity:low |
1/20 I have a rather common shell-scripting problem, but I am not sure how to do it in csh/tcsh. I want to check the ctime (last modified time) of a file. If it is older than, let say, 1 hours, do something, older than 3 hours, then do something + something else. Any hints on how to do this? do i need to convert it to epoch to perform such manipulation? thanks \- find or perl \_ or stat(1) \_ find is an excellent tool for this, especially if you have access to a modern find. Look at the -ctime and -mmin options to it. \_ thanks. will work on "find." |
2009/1/5-8 [Computer/SW/Unix] UID:52313 Activity:kinda low |
1/3 no hurry but do you know of: $ chsh Password: Enter the new value, or press return for the default Login Shell [/usr/local/bin/bash]: /bin/zsh failed: Insufficient access \_ Yes. For now, email root@csua if you'd like to change your shell. \_ oh i'm more interested in the how'd this happen/why, from a system analysis/no fault point of view. was it the ldap? \_ Yeah, it's the LDAP. sudo'ing chsh worked last time I tried which, admittedly, was a while ago. We may just move back to passwd and put up LDAP w/ a passwd backend. --t \_ The underlying reason is that the way we 'sorry' people who need to have their account disabled is by changing their shell. If you can change your own shell, you could connect to LDAP directly and change it to be un-sorried. So we need to figure out a way to fix that little loophole... that's why changing shell is disabled. As mentioned earlier, email root@csua for shell changes. |
2008/12/19-28 [Computer/SW/OS/Linux, Computer/SW/Unix] UID:52283 Activity:nil |
12/19 what's your favourite unicode api for linux/unix? \_ qt, definately. QtString::Utf8 4tw. \_ I don't like their license. - !op \_ anything else? |
2008/12/9-15 [Computer/SW/Unix] UID:52218 Activity:moderate 50%like:52280 |
12/9 Is there a how-to to use csua ftp service? I used to ftp to http://ftp.csua.berkeley.edu but now I have forgotten what exactly needed to set it up again. \_ fixed for 80 columns. \_ Are you trying to ftp as anonymous or as a soda user? \_ Ask again in two weeks, when finals are over and maybe the vp can get back to you on that. --t \_ Ask again in two weeks, when finals are over and maybe the vp can get back to you on that. --t \_ You're better off emailing root@ with questions like that... |
2008/11/24-28 [Computer/SW/Unix] UID:52090 Activity:nil |
11/23 How do you find the max # of forkable threads in a unix environment? Is it system or user based? \_ getrlimit, or ulimit -a (in bash) |
2008/11/16-17 [Computer/Networking, Computer/SW/Security, Computer/SW/Unix] UID:51999 Activity:low |
11/16 Can I use my SBC Yahoo! DSL login name "xxx@sbcglobal.net" and password for the DSL at someone else's home? \_ Why don't you try it... \_ Don't check your email at your mistress' house. |
2008/11/12-13 [Computer/SW/Unix] UID:51932 Activity:nil |
11/12 May be useful if you want to learn UNIX tricks (good for noobs, good refresher for others): http://ask.slashdot.org/article.pl?sid=08/11/05/2027234 \_ that was not lol. and actually a waste of time. lol lol lol lol. \_ waste of time. yawn. |
2008/10/31-11/2 [Computer/SW/Security, Computer/SW/Unix] UID:51769 Activity:nil |
10/31 As root, is there a way to make "passwd" give the same "too short" and other bad password errors (or at least warn in those cases)? This is on linux. |
2008/10/31 [Computer/SW/Unix, Computer/SW/Languages/Misc] UID:51767 Activity:high |
10/31 I guess this idiot feels so disenfranchised with the implosion of his ideology that he has to spam completely unrelated forums with his drivel. But since he's clearly doing it via some sort of script, can root please block him and squish the account? \_ Is this an example of the new liberal political order? -emarkp \_ no, it's an example of how it's not cool to post 300 lines of drivel to the motd. -tom \_ what are you talking about \_ Hey, I remember some pretty crazy shit from the lefties on the motd back in the day. I might have even posted some of it myself... |
2008/10/23-28 [Computer/SW/Security, Computer/SW/Unix] UID:51654 Activity:nil |
10/23 Woman charged with crime for "killing" (deletion really) of online character: http://tinyurl.com/6lspuv \_ she is weak. SHe should have created her own character and then do a backstab on his ass. - turin |
2008/10/13-16 [Computer/SW/Unix] UID:51497 Activity:nil |
10/13 Can anyone recommend a decent open source software package to track passwords in a global network (Windows+UNIX systems) ... I'm sick and tired of waiting days for IT to track down the one person with root on some server somewhere. \_ its not open source, but we've been using Cyberark (http://www.cyber-ark.com it's done the job well enough. Considering what it cost, I bet an open source competitor would not be hard to write... -ERic \_ LDAP |
2008/10/13-15 [Computer/SW/Unix] UID:51490 Activity:low |
10/12 I got sucked into doing some wedding video stuff using basically a handheldsetup and a single finger holding down the record button. I have imported eveerything I have on to my macbookPro and Imovie. I would like to try to do at least some cleanup of the shakey images. My kodak V1253 is not really designed to do viddeo clips longer than a minute at most and i was doing closer to five. Lots of sorefingers and wrists as a result.Any inexpensve suggestsions that will at provide some marginal imporveent to the videos? (* And I will try and bry a tripod with mext tme ) \_ such software does not [yet] exist but I see this as a really amazing, obviously should have done startup idea that'd really take off. |
2008/10/9 [Computer/SW/Security, Computer/SW/Unix] UID:51447 Activity:nil |
10/8 http://www.scribd.com/doc/4964973/Worst-Captchas-of-All-Time Worst captchas of all time. Some stupid, some funny. |
2008/9/7-12 [Computer/SW/Unix, Computer/Domains] UID:51089 Activity:nil |
9/7 Dear Linux DNS experts, how do you find out if a domain has published SPF records? Is there a magic command like hostname, nslookup, etc that does this? I'm a UNIX noob. Thanks! \_ host -t txt $DOMAINNAME -ERic |
2008/9/3 [Computer/SW/Unix] UID:51030 Activity:nil |
9/3 Okay, my sed and awk skills are obviously not up to par here. I want to only see the "500's" in my apache error log, how do I do that? I want to see the whole line, not just the 500 error code. Never mind, grep " 500 " is close enough. |
2008/8/18-21 [Computer/SW/Unix] UID:50894 Activity:kinda low |
8/18 How long has the command "seq" been around? I just saw it in one of my coworkers shell scripts and wish I had known about it years ago... \_ what does it do? - bash fan #1 \_ It prints out a sequence of numbers from FIRST to LAST in a specified increment. \_ in bash (taken from ksh, I believe), that's for ((i=0;i<10;i++)); do echo $i ; done \_ soda:~% seq --version seq (GNU coreutils) 5.97 Copyright (C) 2006 Free Software Foundation, Inc. \- you can also use jot a hozer guidelines. Should anyone step far enough outside the hozing boundaries I will lobby them for the ability to squish. -mrauser \_ Auto-deletion directly denies access to the motd and thus prevents the free exchange of ideas that is necessary for a "marketplace of ideas" to function. Auto-posting doesn't directly deny access, and while it may drive people away from the motd, the motd still remains accessible. Thus, I think that auto-deletion, in which you don't know what you lost, is a much worse form of terrorist, than auto-posting, which only makes it harder to find things. Personally, I think both auto-posting and auto-deletion need to be controlled for the motd to function effectively. \_ seq shreads. I use the -w option for naming nodes in a script for a linux cluster: for i in $(seq -w 1 200); do echo n$i; done will give you node001-node200 |
2008/7/14-16 [Computer/SW/Languages/Perl, Computer/SW/Unix] UID:50557 Activity:moderate |
7/14 Shell Programming question: I want to call a script with 1 arg and have it figure out whether $1 is a MAC address or an IP address and then do call the appropriate function. What is the best way to do this, given that sh/bash/ksh do not have something like the =~ in perl. Check for exit status of grep, or is there a a better way? For the moment, let's just say the two tests are: echo $1 | fgrep : > /dev/null && echo isMAC || echo notMAC echo $1 | fgrep . > /dev/null && echo isIP || echo notIP and if neither, then Usage() I want to avoid requiring the user to either do "-i IP" or "-m MAC". Note: this doesn't have to do extensive syntax checking ... it's not a security application. Just trying to save typing. \_ You may want to recheck your assumption of bash not having =~. \_ Thanks for that information. I didn't know know about that. Although right now it is in sh. Any portable pure sh ideas? I'm really interested in what is the "right" way to do this, rather than just coming up with something which works. \_ "right" depends on your situation. If you actually need to support old systems, or be portable across many systems, then maybe you should stick with sh. If you know your audience is all going to have bash or whatever (and that is not at all unlikely these days), then I see no good reason to suffer under older, less capable tools. \_ Dude, it's a sh script. If it works, it works. Seriously. Stick it in a function if it looks too ugly and then forget about it. If you need something to be maintainable or it's a called enough there is any concern about it being too slow you are going to have to bite the bullet and use a reasonable scripting language. Otherwise just make it work and move on to something that is worth spending time on. \_ I think "right" in this case, means readable and maintainable by the next poor guy that has to come along. Just document your code and you will be fine. \- I think one way to distill the question is "how do i get =~ in sh" ... would you do "echo $string | egrep <regexp>" + $? to get exit status of the grep ... I think the case approach below is nice and clean as long as you are ok with something like *:*:*:*:*:* for MACs and *.*.*.* for IPs, and dont need "true" regexps. "true" regexps. I wouldnt use awk to test, but maybe if you need to mangle. \_ Why would you do this in a shell progam? \_ use case: found="NO" case "$1" in *:*) echo "isMAC"; found="YES";; *.*) echo "isIP"; found="YES";; *) if [ "$found" = "NO" ] ; then echo "NOT MAC" ; echo "NOT IP"; fi ;; esac |
2008/6/12-13 [Computer/SW/Editors/Emacs, Computer/SW/Editors/Vi, Computer/SW/Unix] UID:50233 Activity:nil |
6/12 Does emacs or vi include a column paste? I sometimes have a block text I want to insert horizntally next to another block/column. This is common for data plotting etc. In Microsoft Word has this, I need it in a Unix text editor. \_ Does M-x picture-mode in emacs work for you? \_ Yes, with the commands below, thanks. \_ C-x r k runs `kill-rectangle' C-x r y runs `yank-rectangle' \_ Does this work outside picture mode? \_ Yes. There are quite a few other rectangle commands as well. \_ How do you select a rectange? \_ It's defined by point and mark. RTFM for details. \- also valuable in emacs is align-regexp |
2008/6/10-13 [Computer/SW/OS/VM, Computer/SW/Unix] UID:50210 Activity:nil |
6/10 Is there a handy guide to virtualizing an already running physical linux box into an instance of Vmware? \_ this probably isn't the "right" way, but I have many times just run rsync. ("rsync -vpa root@oldbox:/ /") on a fresh virtual image. Just make sure the partitions are the same on the virt disk as on the real disk and if you are using a new udev, kill the info in /etc/udev/rules.d/z25_persistent-net.rules before rebooting the virt). I have not had any problems doing this. \_ I attended a talk where I *think* VMware mentioned a tool they provide to do this. Check their web site. \_ Yes. You want VMware's p2v (Physical to Virtual) tool. |
2008/6/6-10 [Computer/SW/OS/Windows, Computer/SW/Unix] UID:50172 Activity:nil |
6/6 Am I in alone is really hating tabbed web browsing? I cannot stand it! If I go to a new site I like to have a new window because I might want to see both sites at once or I might want to kill the window entirely if it gets hung up. From my POV tabbed browsing is not a plus. \_ I multitask between 2-3 different things, meaning I need to go back and forth on documentation, manpage, various test URLs, etc. But then again I'm a very atypical developer since I can do many things at the same time. My take is if you're a better single tasker, multi-tabs may be too difficult to grasp. \_ How can you multitask when you can only see one site at a time? Tabs are sort of the antithesis of multitasking. \_ You are dense. I'm sure that's not the first time you've heard this. You think everyone should think like you and if not, they're idiots. Dumb fuck. I'm done with you. \_ I'm reading a piece of code, then I need to branch off to understand a function, then I need another function, then I need to come back, then RFTM, then email, then calendar, then check news. I don't want to keep opening new windows, so tab seems the best next thing. \_ This sounds like serial tasking to me. \_ Very true, but the cost of context-switch is 1/5-1/10 of the original cost of serially changing URLs. Did you even take CS162? \_ Which part of CONTEXT-SWITCH don't you understand? Motherfucker! \_ PP does SMP \_ prev post is a rip-off from a movie \_ Which is what people do. I don't think you read two pages at the exact same time. Do you read books by starting each page at the top all at once? \_ And lucky for you you can turn it off. \_ Of course. I just don't see why this is some 'feature' that people seem to get excited about. It would be nice if it went away. \_ YOU don't see it, but many people do. Majority rules. Yeah yeah, you're smarter and better than everyone else so YOU don't see WHY people want it in the first place, and YOU wish it would go away. What a fucking tard. \_ Yes, the majority usually is right about deciding what's best - from McDonald's to VHS. \_ it's not going away. just don't use it. \_ Well, I like it a lot, I hardly ever want to see 2 sites at once. I do open up a lot of tabs though. \_ Safari now makes it easy to take a tab and make it a new window. The few times I want two windows at a time it is a nice feature to have. \_ Now *this* is a nice feature. \_ And opera's had this feature for about 5 years. \_ Great. |
2008/5/31 [Computer/SW/Apps/Media, Computer/SW/Unix] UID:50105 Activity:nil |
5/31 I have a slow wireless router and slow fileserver on my network. Is there a video or media player (windows or unix) that is smart about caching content while playing it? I would like to be able to hit play on a file from a file share, wait for it to catch up for a while because my connection is so slow, walk away for a while and come back and view my movie with no annoying skips. thanks. \_ To answer my own question, this worked: http://forum.videolan.org/viewtopic.php?f=14&t=44005#p140567 |
2008/5/21-23 [Computer/SW/Security, Computer/SW/Unix] UID:50023 Activity:nil |
5/21 remember the big guy who runs Comic Relief in downtown berkeley? he died, at 50, on monday: http://blogsearch.google.com/blogsearch?q=%22rory%20root%22 http://www.comicsreporter.com/index.php/rory_root_1958_2008 \_ "Worst. News. Ever" |
2008/3/31-4/6 [Computer/SW/Unix] UID:49622 Activity:nil |
3/31 There's this website that I'd like to perform an asshole wget operation on it (wget -r --level=3 -k http://site.com However, it's got rate throttling and denies me if I fetch too quickly. Is there like a "--wait 10" command or something I can use with wget? ok thx. \_ man wget, look for "--random-wait". \_ man wget, look for "--wait". \_ Oh man, I can't believe I missed it. Thanks motd! -op \_ Different versions have different features. Don't do this from soda. \_ I just did a bunch of wgets on soda. Now what? -op \_ This could be considered a DOS attack. It's not nice to do that from a shared machine, because you could be prosecuted. \_ Look up DOS attack. |
2008/3/17-21 [Computer/SW/Security, Industry/Jobs, Computer/SW/Unix] UID:49482 Activity:nil |
3/17 http://market-ticker.denninger.net Former sysadmin says Fed measures not addressing root of problem, IBs/banks will eventually be taken to woodshed \_ Once again, who cares if he is a sysadmin? \_ It dovetails nicely with the background of most of the pontificators on the motd. What's not to like? We really need to get this guy a soda account! \_ If sysadmins had run Bear Sterns the company would still be solvent right now. \_ He's got tech skills. I've got tech skills. Therefore I care what he says about the economy...? Huh? He may be 100% on the mark but having tech skills does not make his writing on the economy any more interesting. |
2008/3/13-17 [Computer/SW/Unix] UID:49442 Activity:nil |
3/12 Unix sysadmin for last 6 months says: Market in for real hurting http://ticker-classics.denninger.net http://www.denninger.net/resume.html \_ Uhm... so? He has some points, what does his unix background have to do with anything either way? \_ the non sequitur is interesting by itself \_ maybe he's like all us losers, but in that case, it would be interesting if he were right \_ This guy hasn't worked since 98? \_ i believe he sold his business for $5-15M and is doing smaller jobs when he feels like it |
2008/3/6-7 [Computer/Domains, Computer/SW/Unix] UID:49354 Activity:low |
3/6 Starting a Web 2.0, scaling up slowly. Should we go the physical-servers-in-a-colo route, or go for some sort of scalable virtual hosting? \_ At start? Do the cheapest thing possible. When you're ready to get something real going hire someone who knows wth they're doing to help you if you haven't done a colo before (sounds like not). Otherwise you'll be sorry later when you have a pile of useless hardware and a broken architecture that can't support your site. \_ The person who'll be doing it is me. I've setup colos before, but not in the last 5 years. I was just wondering if the "best practice" for small startup had changed due to new players like the Amazon virtual hosting thing. \_ How big do you think you are going to be at start? If one or two machines can handle it, throw one or two machines somewhere cheap and don't worry about it. There's no best practice for a site that gets in the order of 1000s of hits a day. \_ The only best practice you need to worry about at the beginning like that is to ensure that your data is backed up. If you get enough traffic to warrent it, you can do a cost/benefits analysis of hosting vs. colo. \_ I am aware of a wide range of startups using Amazon's EC2, usually in conjunction with S3. The advantage is that it's dead easy to add more resources as needed, and I get the impression that it's not too hard to migrate away from when and if you grow to the point where having your own hardware becomes economical. Plus, Amazon has way more resources to dedicate to infrastructure than you do. |
2008/2/28-3/4 [Computer/SW/Security, Computer/SW/Unix] UID:49282 Activity:nil |
2/28 Is anyone's IMAP password no longer working? \_ for the past two or three days, connecting to mead. :( \_ It works for me. Could you please tell me when you stopped being able to log in, and what error message you get? --mconst |
2008/2/6-7 [Computer/SW/Unix] UID:49077 Activity:nil |
2/6 % w | sort | awk '{print $1}' | uniq | wc |
2008/1/31 [Finance, Computer/SW/Unix] UID:49039 Activity:nil |
1/130 Partial Filmography * Anal Expedition 11 (Evil Angel Video) (2007) * Big White Butt Lingerie Show (Evasive Angles) (2007) * Black Assassins (Platinum X Pictures) (2007) * Black Dicks In White Chicks 14 (Red Light District) (2007) * Blow It Out Your Ass (Elegant Angel Productions) (2007) * Cuckold (JM Productions) (2007) * Gash Bash 3 (JM Productions) (2007) * I'll Take It Black 3 (Red Light District) (2007) * My First White Chick (Adam & Eve) (2007) * Nasty Universe 3 (Mercenary Pictures) (2007) * Nutts 4 Big Butts 2 (Exquisite Pleasures) (2007) * Smothered N' Covered 2 (Red Light District) (2007) * Squirts So Good 5 (DVSX) (2007) * 1 Lucky Fuck 2 (Platinum X Pictures) (2006) * 10 Man Cum Slam 15 (Kick Ass Pictures) (2006) * 110% Natural 10 (Red Light District) (2006) * 5 Guy Cream Pie 25 (Kick Ass Pictures) (2006) * 50 To 1 3 (Platinum X Pictures) (2006) * Ass Masterpiece 1 (Naughty America) (2006) * Belladonna: No Warning 2 (Evil Angel Video) (2006) * Big Booty White Girls 4 (Evil Empire) (2006) * Big Bubble Butt Anal Sluts 1 (Evasive Angles) (2006) * Big Bubble Butt Cheerleaders 5 (Evasive Angles) (2006) * Big Butt Teen Flesh 1 (Evasive Angles) (2006) * Big Tit Brotha Lovers 8 (Exquisite) (2006) * Big Wet Asses 9 (Elegant Angel Productions) (2006) |
2008/1/28-2/2 [Computer/SW/Unix] UID:49022 Activity:nil |
1/28 Quick regex Q: Say I have a line of data, and inside that line I have some parts between two symbols: This is a line ~of data~ where ~the tildes are my symbols~ How do I sed this line to get rid of the tildes and anything between each pair of tildes? The end result should be: This is a line where \_ 's/~[^~]*~//g' To handle the whitespace the way you request would be trickier and would require more knowledge of just how you're using these tags. \_ Thank you. I'll work with this for now. \_ I'm not sure I understand how your regex works. Wouldn't 's/~.*?~//g' do the job handling whitespaces as well? - ! op/pp \_ nvm. Just understood what you meant about whitespaces. -pp |
2008/1/21-31 [Computer/SW/Unix] UID:48977 Activity:nil |
1/21 Does the "etc" in the Unix directory name "/etc" stand for "et cetera", or is it just a coincidence? Thanks. \_ Yes it does. |
2007/12/14-19 [Recreation/Dating, Computer/SW/Unix] UID:48804 Activity:nil |
12/14 My wife would like a gift card for a good sausage, or possibly a day spa sort of place. (Some place relaxing I guess.) I live in Livermore. any ideas? \_ Yelp. Spa. Search. \_ I'm sorry, I don't know what this means. -op \_ I think PP means go to http://www.yelp.com enter "spa" and "Livermore, CA", and click search. Apparently http://www.yelp.com is some kind of customer review site. -- !PP \_ Nob Hill Spa is outstanding (it's in SF, however) \_ Is there a Raley's spa? \_ I took my wife to Kabuki Springs & Spa for a 50 minute Swedish massage for her birthday. http://www.kabukisprings.com Highly recommended doesn't even begin to cover it. \_ Wow, that sounds perfect, but I'm afraid getting to and from SF will negate the stress relief of the massage. \_ Combine it with brunch, dinner, a show.... She'll sleep all the way home. |
2007/12/13-19 [Computer/SW/Unix, Computer/SW/Languages] UID:48796 Activity:nil |
12/12 Why do I get an error about /etc/tabset not existing when I type reset? Is reset no longer the command to use to clear the screen ? \_ Try 'clear' like normal people. Or Ctrl-L if your shell supports it. |
2007/12/12-19 [Computer/SW/Unix] UID:48790 Activity:moderate |
12/12 In an interview last week I got hit with "What is your best quality?" "What is your worst quality?" I know these are standard interview questions, and I should have expected them, but I am pretty sure I flubbed them. What are some good responses? \_ just do the David Lee Roth style to answering questions: let me answer the question this way and then start talking about whatever the hell you want \_ Best: I never ask stupid fucking questions like this when interviewing people. Worst: I hate people who ask stupid shit like this and I would never work for idiots who do. \_ More seriously, if you can't come up with a best (or at least damn good) quality you shouldn't be interviewing. It is a question that gives you a chance to prove you actually give a damn about your work and skills. The worst quality question is still a bullshit question and deserves all the feces you feel like flinging at it. \_ "I respond very poorly to stupid questions." \_ http://www.penny-arcade.com/comic/2007/11/12 \_ http://csua.com/Computer/SW/Unix/?page=4 \_ http://csua.com/2003/09/17/#10220 (There are no good responses... but there are worse ones. At least they only asked you for ONE bad quality.) \_ Yeah, my last interview asked for 3. \_ I told them the truth, I have fairly poor time management skills. If I get wrapped up in one problem, I'll neglect the other things I have to do. I got that job anyway. \_ The problem with questions like these aren't that they're dumb. They are not. The problem is that the people asking them usually have no idea what a 'good' or 'bad' answer is. They just ask because they were asked the same in the past. I assume at some point in the distant past someone who knew what they were doing came up with the best/worst question and it spread like a plague from there. As someone above said, there is no good answer, just don't say "my worst trait is <insert felony activity here>" and you'll be fine. \_ Worst trait: Sometimes I am too much of a perfectionist -or- sometimes I work too hard or some other such bullshit. No one expects a serious answer to such a question (or at least they should not). It is also okay to list an actual negative trait that you have that is not that big a deal "sometimes I get excited about an idea in meetings and interrupt other people." You better have some damn good answers to the "best trait" question though. \_ I once answered, honestly, that I don't react well to being micromanaged, but 1) I didn't really want the job, and 2) I wasn't offered the job. --erikred \_ But that is the right answer is the manager was a micromanager. \_ But that is the right answer if the manager was a micromanager. You wouldn't have been happy anyway. Why would anyone try to get a job they wouldn't like? \_ In this case, because I was already in a job I didn't like. Realization that the new gig was also what I didn't want hit about midway through the interview. until about midway through the interview. \_ No matter how bad your current job is, don't flee it. Go to a new job you want to have. Sounds like you made the right call. \_ Sounds like someone who never really had a job so bad it was affecting your sleep, your health, and other aspects of your life. Sometimes fleeing is the best option. \_ Oddly enough, you're both right. It was the latter kind of job, but I needed the benefits and the salary, and the other job would have been even worse. Fortunately, something much, much better came along two months later. \_ sounds like to you, but incorrect. the guy who replaced me didn't last 3 months. fleeing is not a good option. you just end up at another crappy place. and you'd miss out on the job you wanted like the other person here posted. i see zero value in going from one shitty life sucking job to another shitty life sucking job. \_ Sounds like the guy who replaced you was smart enough to flee. \_ He already had another job the whole time. This job was easy for his first three months because I unloaded all the easy but time consuming crap on him. Once he had to do the real work, it was easier for him to just pick up more hours at his other job. He didn't flee to another job. He had one all along. \_ So he knew all along that your job sucked, but it took you much longer to figure it out. \_ No he had no idea until he had to do it. I kept it during that time because there were no other jobs available without taking a dramatic pay cut *and* working for an equally shitty place. But I'm sure you had your choice of great jobs in the 2001-2004 years because you know everything. |
2007/11/12-16 [Computer/SW/OS/Linux, Computer/SW/Unix] UID:48623 Activity:nil |
11/12 how do i make a fail safe magical backup for my debian box that i can quickly boot from if the box explodes? \_ keep a linux live boot cd around for just such an emergency \_ And learn about 'dd' \_ I was hoping there was something as slick as CCC, for unix. \_ You can first duplicate the disk offline with dd, then just keep it up to date with regularly scheduled rsync, which should work fine as long as you're using a bootloader like grub that understands the filesystem rather than lilo. A more elaborate system would be to use a filesystem that allows snapshotting, but probably unnecessary in most cases if databases aren't involved. |
2007/11/12-16 [Computer/SW/Unix, Computer/SW/OS/OsX] UID:48607 Activity:high |
11/12 Server nerds, CCC for mac is totally awesome. is there somethng as cool and friendly for PC or unix? \_ Hi. "CCC" is a free mac program known as "Carbon Copy Cloner". If you use a Mac, and have some sort of external usb or firewire drive, I recommend you spend 15 minutes downloading it and setting it up. You can easily make a backup set up your data, set up incremental backups, and even make a nice bootable image of your drive onto your external usb drive, so when the disk on your Mac finally fails (all drives fail eventually), it's just a few minutes work getting up again (after you replace the drive obviously). I'm not trolling, I'm just describing my experience, my Mac is not running a terabyte SAN NAS fiber highly available hot swapping RAID, calm the fuck down. \_ What is CCC? -dans \_ Wow, you are really ignorant. Stay in school! \_ Color Climax Corp. of Denmark. \_ Oh, so it's like rsync for people who can't be bothered to learn rsync. -dans \- dont be silly. i'm a "BFUN" [\infra] and probably have looked deeper into rsync than 99% of rsync users [i.e. how to optimize for certain large data sets in scientific computation, see e.g. mutli-round rsync paper], but i use these $5-$30 programs to back up my computer ... the calculus is "are these worth $5-$30", not "can i write something similar". ironically your comment echos holob's "http is ftp for idiots". \_ If I'm going to back up data it's because I value it appreciably more than $5-$30. I've seen elaborate backup systems fail at recovery time because the data was corrupt. You'll forgive me if I compare a known good one-line rsyncism to a $5 to $30 backup program that may or may not work. I think you and I are working with different calculuses. -dans \_ This is again typical: 1. you are claiming this isnt that hard 2. You claim you wouldn't trust a program that google will tell you has 1000s of satisified users --> 1. do you think everyone else is a moron? or 2. do you not feel you can tell the difference between a review written by a moron/non moron? ... in fact often you can even read the author's writings and judge for yourself ... in fact if you weren't such a pud, you might even if you weren't pud like you, you might even entertain the notion the author is cleverer thn you. and it's a question of whether your than you. and it's a question of whether your "marginal time" to reproduce the functionlity of the $30 software is worth $30 ... not "is the functionality of the software worth $30". The fundamental E_HOLARB is the "center of universe problem": statements he makes "about the world" often are really "about the universe" often are really statements about his state of knowledge. one attendant phenomena is pronoucing things "easy" when you really havent considered the "easy" when you relly havent considered the nuances. does ths sound familiar ["one line rsync"]? you have a lot in common with holob, except i think your head is further up rsync"]? man you have a lot in common with holob, except i think you head is further up your ass ... might be interesting to see over time whether it gets buried deeper or starts to "slide" out. "if the functionality of the software worth $30". man you have a lot in common with holob, (like assuming things where you havent considered some nuances "simple" ... the Fundamental Holarb Diagnosis aka the "center of universe problem" is statements he makes "about the universe" often are really statements about his state of knowledge) except i think you head is further up your ass ... be interesting to see over time whether it is buried deeper or starts to "slide" out. it is gets buried deeper or starts to "slide" out. \_ Partha, if I didn't know how to accomplish this with rsync already, then, yes, that would make sense. In my case, the time required to reproduce the functionality of a $30 piece of software is a sunk cost. The time to research that piece of software has a significant marginal cost. Also, one or even many good reviews don't offer proof that the software doesn't have some obscure, fatal flaw. I'm not saying that this is the case for everyone. -dans \_ You simply are wrong if you think all one of these backup suites does is rsync-type functionality. I'm not interested in assessing whether this error is due to ignorance or arrogance etc. \_ Oh, I have no doubt they do other things; it's more a question of what *I* need/how well it handles massive amounts of data. -dans \_ Do other languages have the 'your head is lodged firmly up your ass' idiom, or is this an English only thing? \- only in pointer-based languages --psb \_ So you are saying dans is difficult to garbage collect? -- ilyas \_ Are you saying dans is hard to garbage collect? -- ilyas \_ This is true. In my experience if you're not a big fucking unix nerd and you spend all day making pretty pictures in Adobe CS, you don't want to worry about the details of rsync and keeping backup restoral incremental sets. In fact even if you are a big fucking nerd you have better things to do. \_ I'll have to check it out. If only it was invented ten years earlier. -dans \_ Color Climax Corp. of Denmark. Check out its Teenage Sex series. \_ Chaos Computer Club |
2007/11/5-6 [Computer/SW/Unix] UID:48537 Activity:kinda low |
11/5 sed/awk question. Let say i have a csv file. I need to do two things: 1. insert a comma after first character in the first column 2. merge 2nd colmun with first, separate by a comma. so, original file may look like this abc, def, ghi, jkl ... it will become a\,bc\,def, ghi, jkl any idea? \_ Stop rolling your own CSV parser! http://www.secretgeek.net/csv_trouble.asp \_ Sadly the solution he has is .NET, but yeah. Libraies exist for this kind of stuff in every language you would ever use. There's no need to reinvent the wheel. \_ The advice is good. I used FasterCSV for Ruby and it's great. \_ Hypothetical: the above csv libraries don't exist. Why use sed/awk insead of perl? |
2007/11/1-2 [Computer/SW/Unix] UID:48509 Activity:nil |
11/1 What version of Linux/Unix does Samba test on before releasing to the public? |
2007/10/24-26 [Politics/Domestic/California, Computer/SW/Unix] UID:48436 Activity:low |
10/24 Animated gif satellite view of the fires http://www.osei.noaa.gov/Events/Current/CaliforniaFire.gif \_ Wow. I never heard about the one in Mexico. \_ bah, it's only a four hour window \_ http://rapidfire.sci.gsfc.nasa.gov/gallery \_ http://www.signonsandiego.com/firemap \_ http://alg.umbc.edu/usaq |
2007/10/18 [Computer/Blog, Computer/SW/Unix] UID:48378 Activity:nil |
10/18 To whoever seriously thought Flickr has 3 9's of uptime, I have one thing to say to you: http://l.yimg.com/www.flickr.com/images/photo_unavailable.gif -dans |
2007/10/9-11 [Computer/SW/Unix] UID:48269 Activity:nil |
10/9 It's great that soda's been more or less up for the past few months, but I really hate Linux and all this gnu shit... ELinks, crappy vi, etc. I miss links and a tcsh that works. \_ What's wrong with the current tcsh on soda? Why don't you just ask root to install links or build it yourself? Also, barring things that actually need to talk to the kernel, e.g. threading libraries, why would running a gnu licensed kernel stop you from installing non-gnu software? -dans [formatd] \_ ftp ; unzip ; untar ; make install \_ Oops, it just went down. |
2007/10/4-7 [Computer/SW/Unix] UID:48240 Activity:high |
10/4 What's the command to create a new login on a Linux 2.6 machine? I already have root password. I think it's "useradd" or "adduser", but it's not in root's path. Thanks. -- linux idiot \_useradd -g groupname username \_ specifically /usr/sbin/useradd. You shoudl add /sbin and /usr/sbin to root's path, if they arent already there. -ERic \_ It works! Thanks. -- OP \_useradd -g groupname username \_ specifically /usr/sbin/useradd. You shoudl add /sbin and /usr/sbin to root's path, if they arent already there. -ERic \_ It works! Thanks. -- OP \_ vi, emacs, cat, echo \_ meanie \_ realist -dans \_ ED IS THE STANDARD. Text editor. \_ meanie \_ realist -dans \_ ED IS THE STANDARD. Text editor. |
2007/9/3 [Computer/SW/P2P, Computer/SW/Security, Computer/SW/Unix] UID:47877 Activity:nil |
9/3 So I was watching the Today Show this morning and in the crowd of jackasses trying to get on TV, some dude kept emphatically showing a home made sign that simply said, "lemonparty.org." None the wiser, I fired up my laptop, curious as to what could possibly be at http://lemonparty.org. I wondered why he was smiling so mischievously, shaking his sign in the air each time the camera had him in the frame. Could it be some family reunion site? A wedding announcement? A site devoted to lovers of lemons? Oh no, I would not be so lucky. No sir -- or ma'am -- it was a photograph of three geriatric men engaged in very passionate adult loving. And by loving, I mean a good old fashioned three-way. Of course, I couldn't let it go at this. I had to find out more about http://lemonparty.org, as it seemed like an inside joke to which I was not privy. A friendly google search yielded several results, all informing me that http://lemonparty.org is supposedly a shock site, in the ranks of loopback.jpg, http://tubgirl.com and goatse.cx. Now, I'm not sure if the shock value or http://lemonparty.org packs the same punch as the aforementioned peers, but I can only imagine a suburban housewife or lonely grandpa typing the web site in as I did, because, well, they too had nothing better to do. So why am I sharing this? I honestly don't know, other than I needed to purge my conscience. I think this was either one of the most wonderfully subversive things I've seen on TV in a long time, or one of the more disturbing ones (although I doubt there are many young kids watching the Today show on Labor Day). But, hey, old guys need to get it on, too, I suppose; so lemonparty indeed! \_ Yucks! It's amazing enough that that guy can get it up. |
2007/8/31-9/3 [Computer/SW/Unix] UID:47860 Activity:nil |
8/31 Pretend I am going to be on a boat in the arctic. I want to upload whale song sound data while I am on my terrible internet connection in the middle of the arctic. What would I use? FTP seems so 80s. \_ FTP is a tool that works and does exactly the job you want. What's wrong with FTP? \_ I am unwilling to open up FTP on my server back here in the states. \_ Why? What makes FTP more insecure than any other way to transfer files? \_ It's too annoying to ope nthe proper prots for FTP . have you ever tried? if you have, you would agree with me. \_ All 2 ports? Tom has the right answer below but you can safely use ftp. The real problem with what you're looking to do is your shakey network connection. You want to make sure your xfer mechanism has an option to restart from where it left off if you lose your connection. Ftp can do that. \_ sftp/scp/rsync. -tom |
2007/8/26-27 [Computer/SW/Unix] UID:47759 Activity:nil |
8/25 I am running unix. I have root. I want to keylog myself. How do I do that? \_ man script \_ no i want to recrod everything typed on my computer. any window. any program. \_ hack tty drivers to write to a file. |
2007/8/24 [Computer/SW/Security, Computer/SW/Unix] UID:47749 Activity:high |
8/24 Anybody experiencing login authentication problems? I cannot login using my login and passwd thru ssh on the SECOND attempt and on: ie, when I do ssh csua, it works once, but not afterwards. Then when I do ssh http://csua.berkeley.edu, it works once, but not afterwards. I can STILL login when I use a machine that use ssh authorized public keys (with the ssh passwd), but not the unix login/passwd. After I login, when I do a passwd, I get the *new* LDAP passwd prompt that allows me to change the passwd, but only once. After that, I can no longer access that LDAP prompt (seems like the LDAP server is rejecting any requests from a particular host after first attempt), but instead I get the *old* unix passwd change prompt that won't take *any* of my passwds: (current) UNIX password: passwd: Authentication failure passwd: password unchanged After about an hour, if I do passwd, I get the new LDAP prompt again-- but only once again. Basically the LDAP prompt comes back in about once every hour. If an admin is reading this please help. Seems like the LDAP server is down and/or unix passwd is out of sync. Thanks. --pchen |
2007/8/24 [Computer/SW/Security, Computer/SW/Unix] UID:47748 Activity:nil |
8/24 Anybody experiencing login authentication problems? I cannot login with unix passwd thru ssh, although I was able to login using my ssh auth keys/cert. Then when I type passwd to change the passwd, I'm getting an LDAP passwd change prompt--but only once: if I type passwd again, I get the Unix passwd change prompt. In any case, it won't accept my old passwd nor allow me to change the passwd. What's going on? Also mail is not working (nothing sent nor received). I emailed root and get no response yet. If an admin is reading this please help. Thanks. -pchen |
2007/8/18-20 [Computer/SW/Unix, Computer/SW/Security] UID:47652 Activity:kinda low 80%like:47603 |
8/17 hey root you wanna restore /csua/bin/mtd one day? \_ did you mail root about it? \_ do you really have to mail root when all of /csua/bin/ disappears? \_ empirical evidence would say, "yes, you do". -!root \_ yeah. |
2007/8/18 [Computer/SW/Unix] UID:47649 Activity:nil |
8/17 How to I grep to exclude all lines with more than 1 / ? \_ After reading the grep man page: grep -v -E '/[^/]*/' myFile |
2007/8/13 [Computer/SW/Unix, Computer/SW/Security] UID:47605 Activity:nil |
8/13 hey root would you engage in scrotal inflation? thanks \_ Have you emailed root? Because the motd.public isn't the preferred contact method. \_ I did. \_ Hey root, i think Spamassassin is dead too. \_ I think root is too busy leveling in WoW. |
2007/8/13 [Computer/SW/Unix, Computer/SW/Security] UID:47603 Activity:kinda low 66%like:47566 80%like:47652 |
8/13 hey root would you restore /csua/bin/mtd ? thanks. \_ Have you emailed root? Because the motd.public isn't the preferred contact method. \_ I did. \_ Hey root, i think Spamassassin is dead too. \_ I think root is too busy leveling in WoW. |
2007/8/8-10 [Academia/Berkeley/CSUA, Computer/SW/Unix] UID:47566 Activity:nil 66%like:47603 |
8/7 not that you're gonna read this ROOT but you could you restore /csua/bin/mtd ? thanks \_ ObDansFlamewar \_ Huh? -dans \_ I guess he means that you're famous for flaming anyone who ever complains about ROOT not doing anything or not fixing things that meet the wants of the alums. \_ Kind of an oversimplification, but whatever. -dans \_ There was a setuid script /csua/bin/mtd what I assumed cron periodically uses to merge /etc/motd.official and /etc/motd.public . I just want root to put it back, and while they're at it, make /csua/bin/ sticky. I mailed root@csua too. |
2007/8/7-13 [Computer/SW/Languages/Perl, Computer/SW/Unix] UID:47555 Activity:nil |
8/7 I'm trying to figure out whether it's possible for get wget to authenticate to a web page protected by a login form ('post' method to send username/pass, and cookies.) Cookies don't seem to be the problem, with --save-cookies and --keep-session-cookies but getting the username/password submitted isn't doing it. On this particular page, getting to a link, let's say 'example.aspx', redirects to 'login.aspx?href=/example.aspx'; login.aspx is a standard http form. Anyone ever get this working? -John \_ You want a single wget command or are you scripting this? If scripting just hit the logon page first to get your cookie. Otherwise you have to recognize you've been redirected. \_ Why wget? Have you tried curl? \_ I've been able to get this working using wget's CLI options --user=[user] and --password=[passwd] or by posting the right form elements for authentication. \_ Yeah tried both, no good. Curl sounds like it might work, though. Thanks. -John \_ If curl doesn't work for you, I've done this in perl before. It isn't that hard with cpan's lwp, cookie libraries, etc. \_ Or if you hate Perl, Ruby does a good job too. \_ Curl works for submitting the credentials, but I'm having trouble with cookies; the site issues 4 for a normal browser login, but with curl I only get one. I'll keep plugging. -John \_ How can you hate perl for a hack script like this? |
2007/8/6-22 [Computer/SW/Unix] UID:47542 Activity:nil |
8/6 http://www.youtube.com/results?search_query=wilburjr&search=Search Lies lies lies. \_ I can't view youtube from work. What is this? \_ boring. |
2007/8/1 [Computer/SW/Unix, Computer/SW/Languages/Perl] UID:47500 Activity:high |
8/1 perl/sed/awk/etc question: Is there a good way to change every other delimiter or string match? For example change a colon delimited list to a :+, one... Apple:12:Pear:2:Orange:9:Plum:7:Banana:22:Mango:2 to Apple:12,Pear:2,Orange:9,Plum:7,Banana:22,Mango:2 (And I dont mean a trick that relies on some fields being alpha and some numeric or only a known number of fields). \_ How 'bout the straightforward approach s/([^:]+:[^:]+):/$1,/g \_ That didn't work?! Am I doing something wrong? echo Apple:12:Pear:2:Orange:9 |sed -e 's/([^:]+:[^:]+):/$1,/g' Apple:12:Pear:2:Orange:9 \_ use perl, sed will kill you with quoting. \_ Thanks! perl -pe ... does it! \_ One more question, why is there a differene between : and |? I now need to use |. echo "Prog 1:61.3:Ch 2:91.0:Num3:83.4" |perl -pe 's/([^:]+:[^:]+):/$1,/g' Prog 1:61.3,Ch 2:91.0,Num3:83.4 echo "Prog 1|61.3|Ch 2|91.0|Num3|83.4" |perl -pe 's/([^|]+|[^|]+)|/$1,/g' Prog 1,,|61.3,,|Ch 2,,|91.0,,|Num3,,|83.4 First one works. Second does not. \_ man perlre, search for | |
2007/7/23-26 [Computer/SW/Unix, Computer/SW/Unix/WindowManager] UID:47383 Activity:nil |
7/23 shac don't you work at http://foxnews.com? what the hell are you doing? http://reddit.com/info/28nfk/comments |
2007/7/23-26 [Computer/SW/Unix] UID:47378 Activity:nil |
7/23 Can anyone recommend a lightweight caching web proxy for unix that is not squid? thanks. \_ Apache used to have a caching module. The only other non- commerical caching proxy I know of is polipo: http://www.pps.jussieu.fr/~jch/software/polipo I don't know anyone who is using it though. \_ What is wrong with squid? -ausman |
2007/7/6 [Computer/SW/Unix, Computer/SW/Languages/Perl] UID:47196 Activity:high |
7/6 my google fu is weak. How do I match EOF ( tr or perl or sed or any linux tool that will do substitutions in a file)? thanks. \_ What are you trying to do? |
2007/6/12-14 [Computer/SW/Unix] UID:46925 Activity:high |
6/12 Inside of a C++ program, I do a "ps | grep usename" for logging purposes. where username = getenv("USER"); Doing this directly is a gigantic security hole because someone could set $USER to some command line and execute arbitrary code. What's the best way to make this safe? Is there some standard way to check the input in a case like this? \_ How about "ps | grep \"username\""? \_ man getuid, man getpwuid \_ How's your motd logger going? \_ I hope OP isn't doing this for a motd logger. There are much easier ways than writing C++. \_ Some versions of ps support a -U flag (or similar) that lets you pass in the username OR userid. Safest way would be to (1) take the username and translate it to the uid via getpwuid, getpwnam, &c.; (2) exec ps (w/ the full path) and that uid; and (3) read the output in C++. Any otherway is not 100% safe. output in C++. Any other way is not 100% safe. If your version of ps does not support user filtering, you should exec ps (w/ the full path) and read/filter the output yourself. Whatever you do, don't use system() and if you are running as root, please drop privileges before calling exec(). \_ Not running as root. system() is bad, huh? \_ Yes. system invokes a shell for you (in some cases csh). And please use a full path, last thing you want is to be running a PFY's hax0r'ed version of ps. \_ system() is basically a wrapper around '/bin/sh -c $command' with all the vulnerabilities and performance hit you get from spawning the /bin/sh -c and what the shell might do with $command. You're generally safer with fork && exec(command) though then you have to deal with $PATH and massaging the arguments. \_ you should also read up on IFS. \_ you should also read up on IFS. --psb \_ What is IFS? \_ IFS stands for Internal Field Separator, it is what the shell uses to separate elements of the various *PATH variables, among other things. \_ and at the heart of many old skool attacks such as /usr/lib/ex3.7preserve and other insecure popen() problems. insecure popen() problems. --psb \_ Ok, but the command line I'm passing to system is pretty complex. I don't care much about the performance, since the logging is pretty rare. But I used "ps | grep $USER | | sort | head" to get only the results I wanted. Seems like fork exec would in this case would be hard. -op \_ yes it would be. secure code is hard. insecure code is easy. \_ One possible sol'n would be to implement your filter as a one line perl command and then send the output of ps to that perl command. You would reduce the problems to two fork/execs and would increase your security. But the safest way is still to do as much as you can in C and not in the shell via system(). BTW, why do use use $USER from the environment? Can't you read it in using a CLI option or use the current user id via getuid() or geteuid()? \_ Actually, because I didn't know about getuid(). \_ I'm not sure what exactly you are trying to do, but I think you can do all of it w/o system() and not too much work in c++. Based on the above, it seems like you could read the output of ps -U [uid] (or equivalent) into a STL string vector, sort the results and take the top 10. |
2007/6/8-11 [Computer/SW/Security, Computer/SW/Unix] UID:46892 Activity:low |
6/8 I was talking to an acquaintance who said that his workplace was slowly evolving to a stated goal of taking superuser privileges away from the sysadmins in an effort to maintain a strict CM and, I assume in some way, lower costs - possibly by hiring trained monkeys to deploy pre-built images. I am curious what the IT theories are behind this. Is this a crackpot method of system management or is there some established theory behind this? Has anyone else seen this happen at their work? What were the results? My kneejerk reaction is that this is a Very Bad Thing, but maybe there's something to it. \_ Depends. Are they mostly Windows? Mostly UNIX? Who still has superuser access? Are they highly responsive? It can be made to work. But unless it's driven by competent IT management, it could be LOTS o' PAIN \_ All UNIX. I assume the idea is that if a change needs to be made then it is rolled out from some central server somewhere and no admins ever touch the individual workstations for any reason except perhaps hardware failure. \_ CM? \_ configuration management \_ No, this is in keeping with Best Practices surrounding security, especially the notion of "least privelege" which is to say that especially the notion of "least privilege" which is to say that people should have the permissions they need to do their job and no more. I personally think this is fine, but only works after an organization reaches a certain maturity and size. You need at least enough people so that you can have an on-call page rotation for the "root" team and another one for the "admin" team. Email if you want to talk about this some more this is something I have thought about quite a bit. -ausman http://en.wikipedia.org/wiki/Principle_of_least_privilege http://www.csua.org/u/ivq (Forrester Research) |
2007/5/21-24 [Computer/SW/Unix] UID:46717 Activity:nil |
5/21 Yo root - any chance of reenabling finger (for finger motd@csua)? |
12/24 |