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Full Discussion: grep a part of a line
Top Forums Shell Programming and Scripting grep a part of a line Post 302228018 by tipi on Friday 22nd of August 2008 02:35:26 PM
Old 08-22-2008
grep a part of a line
Hi,

In a file FILE, there is a line like this one

MOLECULE C2 H2

I want to extract "C2 H2". I can do it in two step in a script :
Code:
VARIABLE="`grep MOLECULE FILE`" # Assign "MOLECULE C2 H2"
VARIABLE=`echo ${VARIABLE/"MOLECULE "}` # Remove "MOLECULE ".

Then,
Code:
$echo $VARIABLE

gives
C2 H2

Is anyone know how to do it in a more straightforward way?

Thanks a lot,
Tipi
Last edited by Yogesh Sawant; 07-22-2011 at 05:48 AM.. Reason: added code tags
 

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LEARN ABOUT NETBSD

zfgrep

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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