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Full Discussion: -n option with grep command
Top Forums Shell Programming and Scripting -n option with grep command Post 302458185 by milink on Thursday 30th of September 2010 02:45:22 AM
Old 09-30-2010
-n option with grep command

Hi,

what is the meaning of -n option before the grep command ?

grep command searches for the specified string in the file tmp_crontab.txt

but what does -n mean ?
Code:
[ -n "`grep $some_string /tmp/tmp_crontab.txt`" ]

With Regards

Last edited by vbe; 09-30-2010 at 05:01 AM.. Reason: code tags
 

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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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