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Top Forums Shell Programming and Scripting Find common terms in two text file, xargs, grep Post 302563381 by clx on Tuesday 11th of October 2011 05:31:40 AM
Old 10-11-2011
If you want to search for the patterns from a file ( file1 in your example ) , you must use the "-f" option.

"grep -F" is equivalent to "fgrep" ( treating patterns as fix string and not regex) but differ from "grep -f" (patterns from file ) . you probably want to combine the both.
Code:
grep -F -f file1 file2

or

Code:
fgrep -f file1 file2

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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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