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Top Forums UNIX for Beginners Questions & Answers Egrep command is not working for me Post 303000629 by jim mcnamara on Sunday 16th of July 2017 01:19:01 PM
Old 07-16-2017
One way.

Code:
grep 'REREGISTER' test1 | grep 'something'

A much more advanced way is to use negative lookahead.

Suppose you want to eliminate lines with the word "bar" in them:
Code:
egrep '^(?!.*bar).*$'  filename

I'm not sure which one would be best, but the first one is easier to apply to your example. If you have a large number of lines then it becomes much harder to get a clean answer to what you should do.

BTW - your original syntax says any one of the following words ( in your pipe delimited section) is a match print it.
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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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