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Full Discussion: how to finding the exact pattern
Top Forums Shell Programming and Scripting how to finding the exact pattern Post 302505571 by sk1418 on Thursday 17th of March 2011 09:52:48 AM
Old 03-17-2011
using 'A1$' is ok for the example in the top post. but it is NOT secure.
e.g.
Code:
A1
aA1
bA1

if apply the pattern on the file above, all lines will be printed out.

I think the right solution would be
Code:
grep -Fx "A1",

.
example:
Code:
kent$ echo "A1
A12
aA1
 A1
A1 " | grep -xF "A1"
A1

 

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LEARN ABOUT X11R4

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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