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Top Forums UNIX for Dummies Questions & Answers Why do we use a colon (:) in grep? Post 302592471 by Skrynesaver on Tuesday 24th of January 2012 03:25:48 AM
Old 01-24-2012
Because we're looking for the first field of a record that contains a value which consists of the first three characters of the variable JOBNAME bounded by colons in the file named in the SWENV_TAB variable.

Or to rephrase it there are 2 parameters to the grep statement the first can be written as ":$(echo $JOBNAME | cut -c1-3):" the $(...) construct causes the contents to be evaluated
 

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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
All times are GMT -4. The time now is 02:38 PM.
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