[ILUG] grep ??

[Brian Foster]

  | Date: Mon, 5 Nov 2007 10:33:30 -0000
  | From: "O'Leary Patrick" <Pat.OLeary at rte.ie>
  | 
  |          I have been given a very large logfile & a list of about
  | 40 names.  my job is to find every  entry in the log which matches each
  | name in the list of names.  i was thinking of simply doing something
  | like "cat xyz.log | grep each name > output.txt" but the lazy bugger
  | in me does not feel like doing that 40 times.  i've trawled the web but
  | can't come up with a way of giving grep the list of names as a single
  | file.  Any suggestions or help would be gratefully appreciated

 ‘grep -f FILE ...’ (see the GNU grep(1) man page),
 where the FILE contains your patterns (REs), one
 per line.   you may or may not also want the ‘-F’
 option (to search for strings rather than REs),
 and/or the ‘-i’ option (case insensitive searching).

 and you don't need to use cat(1), unless you want
 to win the Useless Use of cat Award.

cheers!
	-blf-
-- 
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