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Top Forums UNIX for Dummies Questions & Answers Egrep confusion with "I" and "-I" pattern Post 302834361 by VBG on Thursday 18th of July 2013 06:20:14 PM
Old 07-18-2013
Linux Egrep confusion with "I" and "-I" pattern

I am executing following command
Code:
egrep -w I filename.txt

the filename.txt has following data ....

Code:
-I 07-18 08:31:19.924 9880 6 SessionManager ConnectConfig: ConfigurationWebService LoginResults=SuccessfulLogin
I am so hungry that I need to eat

I expect egrep to print only the second line, however it prints both the lines.
Please assist.
Moderator's Comments:
Mod Comment Please use CODE tags when displaying sample code, input, and output.

Last edited by Don Cragun; 07-18-2013 at 08:45 PM.. Reason: CODE tags
 

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BZGREP(1)						      General Commands Manual							 BZGREP(1)

NAME
bzgrep, bzfgrep, bzegrep - search possibly bzip2 compressed files for a regular expression SYNOPSIS
bzgrep [ grep_options ] [ -e ] pattern filename... bzegrep [ egrep_options ] [ -e ] pattern filename... bzfgrep [ fgrep_options ] [ -e ] pattern filename... DESCRIPTION
Bzgrep is used to invoke the grep on bzip2-compressed files. All 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 bzgrep is invoked as bzegrep or bzfgrep then egrep or fgrep is used instead of grep. If the GREP environment variable is set, bzgrep uses it as the grep program to be invoked. For example: for sh: GREP=fgrep bzgrep string files for csh: (setenv GREP fgrep; bzgrep string files) AUTHOR
Charles Levert (charles@comm.polymtl.ca). Adapted to bzip2 by Philippe Troin <phil@fifi.org> for Debian GNU/Linux. SEE ALSO
grep(1), egrep(1), fgrep(1), bzdiff(1), bzmore(1), bzless(1), bzip2(1) BZGREP(1)
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