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Full Discussion: UNIX Scripting
Top Forums Shell Programming and Scripting UNIX Scripting Post 302887800 by Don Cragun on Monday 10th of February 2014 10:51:49 PM
Old 02-10-2014
Quote:
Originally Posted by sea
(afaik)
Code:
egrep -A1  "^machine" script.txt > outputfile

should be the same as:
Code:
grep -e -A1  "^machine" script.txt > outputfile

You missed the -A1, as well as there is no need for [ICODE]cat[/ICODE] Smilie

Hope this helps
Almost...
Code:
egrep ...

is the same as:
Code:
grep -E

on systems that both have egrep (which is now obsolescent) and have a -E option in grep (which some very old versions do not have).
 

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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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