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Full Discussion: How to speed up grep?
Top Forums Shell Programming and Scripting How to speed up grep? Post 302375007 by thegeek on Thursday 26th of November 2009 06:39:47 AM
Old 11-26-2009
I assume you are doing this.,

grep 'error message' FILE | grep 'info'

You wanted to do it in, single grep then.,If you are sure, the info is followed by error message, then you can do it by the following,.

grep "error message.*info" FILE

Or you meant some thing else ?
 

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ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep is used to invoke the grep on compress'ed or gzip'ed files. All options specified are passed directly to grep. If no file is speci- fied, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If zgrep is invoked as zegrep or zfgrep then egrep or fgrep is used instead of grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. For example: for sh: GREP=fgrep zgrep string files for csh: (setenv GREP fgrep; zgrep string files) AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), egrep(1), fgrep(1), zdiff(1), zmore(1), znew(1), zforce(1), gzip(1), gzexe(1) ZGREP(1)
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