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Full Discussion: Grep not giving expected results
Top Forums UNIX for Dummies Questions & Answers Grep not giving expected results Post 302820129 by John K on Wednesday 12th of June 2013 05:37:24 AM
Old 06-12-2013
Thank you hergp. Removal of asterik did the trick.

I have three questions on this ?

1. So, we are not supposed to use * (asterik) when using grep ?

2. What was the role of asterik in this particular instance
Code:
$ ps -ef | grep ora_dbw*

3. What is wild card character for grep ?
 

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LEARN ABOUT V7

zgrep

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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