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Top Forums UNIX for Dummies Questions & Answers using cat and grep to display missing records Post 302102788 by jxh461 on Saturday 13th of January 2007 12:07:43 AM
Old 01-13-2007
using cat and grep to display missing records

Gentle Unix users,

Can someone tell me how I can use a combination of the cat and grep command to display records that are in FileA but missing in FileB.

cat FileA one line at a time and grep to see if it is in fileB. If it is ignore.
If line is not in fileB display the line.

Thanks in advance.
 

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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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