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Full Discussion: fgrep command
Top Forums Shell Programming and Scripting fgrep command Post 302382313 by clx on Wednesday 23rd of December 2009 02:42:13 AM
Old 12-23-2009
if using fgrep is not a compulsion:

Code:
while read LINE;do grep -w "^$LINE" File2;done < patternfile

or with awk this should also work

Code:
awk -F"|" 'BEGIN{while(getline<"patternfile") arr[$1]=1 } ; arr[$1] ==1 {print $0 } ' File2


Last edited by clx; 12-23-2009 at 03:47 AM.. Reason: added awk soln
 

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BZGREP(1)						      General Commands Manual							 BZGREP(1)

NAME
bzgrep, bzfgrep, bzegrep - search possibly bzip2 compressed files for a regular expression SYNOPSIS
bzgrep [ grep_options ] [ -e ] pattern filename... bzegrep [ egrep_options ] [ -e ] pattern filename... bzfgrep [ fgrep_options ] [ -e ] pattern filename... DESCRIPTION
Bzgrep is used to invoke the grep on bzip2-compressed files. All options specified are passed directly to grep. If no file is specified, 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 bzgrep is invoked as bzegrep or bzfgrep then egrep or fgrep is used instead of grep. If the GREP environment variable is set, bzgrep uses it as the grep program to be invoked. For example: for sh: GREP=fgrep bzgrep string files for csh: (setenv GREP fgrep; bzgrep string files) AUTHOR
Charles Levert (charles@comm.polymtl.ca). Adapted to bzip2 by Philippe Troin <phil@fifi.org> for Debian GNU/Linux. SEE ALSO
grep(1), egrep(1), fgrep(1), bzdiff(1), bzmore(1), bzless(1), bzip2(1) BZGREP(1)
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