January 2003
Intermediate to advanced
832 pages
32h 40m
English
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Name
egrep
Synopsis
egrep [options] [regexp] [files]
Searches one or more files for lines that match
an extended regular expression regexp.
egrep doesn’t support the regular
expressions \(, \), \n, \<, \>, \{, or \},
but does support the other expressions, as well as the extended set
+, ?, |, and
(
). Remember to enclose these
characters in quotes. Regular expressions are described in Chapter 20. Exit status is 0 if any lines match, 1 if
none match, and 2 for errors.
See grep for the list of available options. Also
see fgrep. egrep typically runs
faster than those commands.
Examples
Search for occurrences of Victor or Victoria in file:
egrep `Victor(ia)*'fileegrep `(Victor|Victoria)'file
Find and print strings such as old.doc1 or new.doc2 in files, and include their line numbers:
egrep -n `(old|new)\.doc?'
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.