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Top Forums Shell Programming and Scripting fetch last line no form file which is match with specific pattern by grep command Post 302492619 by yinyuemi on Tuesday 1st of February 2011 02:59:38 AM
Old 02-01-2011
grep -w :match the whole form word
like:
Code:
echo "1
11
111" |grep 1
1
11
111

Code:
echo "1
11
111" |grep -w 1
1

The second question:
it's hard to say which is faster, it's dependent on your files and your requirement. For your question here, awk would be faster, I guess.Smilie

Last edited by Yogesh Sawant; 02-01-2011 at 06:24 AM.. Reason: added code tags
 

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ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other 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 the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)
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