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Full Discussion: Using grep with hyphens
Top Forums Shell Programming and Scripting Using grep with hyphens Post 302764417 by Yoda on Thursday 31st of January 2013 01:12:26 PM
Old 01-31-2013
From grep manual page:
Code:
-w, --word-regexp
Select only those lines containing matches that form whole words.  The test is that the matching substring must either be at  the  beginning  of
the  line,  or preceded by a non-word constituent character.  Similarly, it must be either at the end of the line or followed by a non-word con-
stituent character.  Word-constituent characters are letters, digits, and the underscore.

You can use an awk code instead:
Code:
awk '{ for(i=1;i<=NF;i++) if($i=="test") print $i; }' filename

 

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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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