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
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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:
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3/2     Is there a way to do "grep p1 file | grep p2" with one grep without
        piping? ie, "grep p1&&p2 file"? Thx.
        \_ use egrep?  man egrep.  Look for egrep -e
           \_ Can I write an alias where I can say "mygrep p1 p2 p3 ... file",
              where I can specify variable number of patterns, with the last
              one being the filename?
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9/13    How can I get grep to serach for the characters '--' or '->'
        (without the single quotes)? grep '--' * doesn't work. Thanks.
        \- egrep -e  '<expression>'  --psb
        \_ grep -- '--' *
           (the first -- indicates the end of the list of options)
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5/30    Let's say I have a directory full of subdirectories, each of which
        has a number of files in it. How can I delete all subdirectories that
        have, say, less than 10 files in them?
                   \_ fewer
        \_ There's no single standard command that will do this.  You'll
           need to write something that will count files per directory,
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3/23    What's the easiest way to find all files on a unix box that contain
        both the words 'imap' and 'pop' on different lines. I'm trying to
        find a courier authd config file that I swear had lines for turning
        on and off different protocols (pop3 and imapd) but I can't find it
        anywhere. and I can't find any references to it. -brett
        \_ hrm.
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6/10    I want to grep for the ocurrance of the ']' and '[' character in a file
        I've tried all sorts of quoting on the command line, everything seems
        to give a ayntax or 'unmatched' error. How can I do this?
        \_ grep '\['
        \_ to search for both, use "egrep '\[|\]'<filename>" -jnat
           \_ That doesn't seem to work as an "or" perhaps the version
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5/5     Given a file, what is the best way to see all lines AFTER (and
        including) a keyword?
        \_ sed -n '/keyword/,$p' file
        \_ agrep?
        \_ perl -ne 'if ($p) {print;} elsif (/keyword/) {$p=1;print;}' file
           \_ thanks.  When do you use perl, sed, awk, egrep?
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11/15   I want to remove all lines in a tex file that have been commented out
        by a % at the beginning  Any fast and easy way to do this?
        Sorry no time to RTFM.  Ok tnx.
        \_ egrep -v '^\%' file > file.new
           \_ grep -v ^% file > file.new
              conserve keystrokes.  ride bike
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