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Special Forums UNIX Desktop Questions & Answers egrep query....request for help Post 302425644 by pseudocoder on Friday 28th of May 2010 06:54:36 PM
Old 05-28-2010
Maybe this excerpt from the egrep man page will help you to better understand how egrep works, note the sentence that I have underlined:

DESCRIPTION
grep searches the named input FILEs (or standard input if no files are
named, or the file name - is given) for lines containing a match to the
given PATTERN. By default, grep prints the matching lines.


---------- Post updated at 00:54 ---------- Previous update was at 00:50 ----------

Code:
$ egrep '(Jolly)|(Brewers)' public
Jolly Brewers
$ egrep -o '(Jolly)|(Brewers)' public
Jolly
Brewers
$

 

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ZGREP(1)						    BSD General Commands Manual 						  ZGREP(1)

NAME
zgrep, zegrep, zfgrep -- print lines matching a pattern in gzip-compressed files SYNOPSIS
zgrep [grep-flags] [--] pattern [files ...] zegrep [grep-flags] [--] pattern [file ...] zfgrep [grep-flags] [--] pattern [file ...] DESCRIPTION
zgrep runs grep(1) on files or stdin, if no files argument is given, after decompressing them with zcat(1). The grep-flags and pattern arguments are passed on to grep(1). If an -e flag is found in the grep-flags, zgrep will not look for a pattern argument. zegrep calls egrep(1), while zfgrep calls fgrep(1). EXIT STATUS
In case of missing arguments or missing pattern, 1 will be returned, otherwise 0. SEE ALSO
egrep(1), fgrep(1), grep(1), gzip(1), zcat(1) AUTHORS
Thomas Klausner <wiz@NetBSD.org> BSD
December 28, 2003 BSD
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