11/3    What is a good way to delete all the lines in a file after
        a regular expression match.  For example, if I want to do a
        "last" and get output only for this year or month, so I want to
        delete all the lines after "Dec".
        \_ sed /Dec/q file
           That'll delete everything after (but not including) the first
           line matching "Dec".  If you want to delete that line too, you
           can use sed '/Dec/,$d' instead.  --mconst
           \- while a fine answer, awk '/Dec/{exit};{print}' may run
              faster than sed '/Dec/,$d' on large input if the match
           \- while a fine answer, awk '/Dec/{exit};{print}' will run a
              lot faster than sed '/Dec/,$d' on large input if the match
              is early. awk may be easier to tweak to make the matching
              more precise as well. The POWER of AWK. ok tnx.
              more precise as well. ok tnx.
              more precise as well. The POWER of awk. ok tnx.
              \_ Indeed.  You could also use sed -n '/Dec/q;p', if you're
                 not ready for the POWER of AWK.  --mconst
        \_ The easiest way, of course, is to assign this to an intern or the
           new guy.