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Top Forums Shell Programming and Scripting General question about the relationship between KSH and sed/grep/awk etc Post 302294719 by JerryHone on Thursday 5th of March 2009 05:45:15 PM
Old 03-05-2009
Yes - you're getting it.

The shell is just a glue that holds everything else together with its own restricted functionality. As Unix is so efficient at parameter passing, STDIN, STDOUT etc and environment inheritance from parent to child process, there's no great reason to include string manipulation or even arithmetic in the shell when there are so many other good ways - sed, awk, perl - of doing things.

Unix scripting or even command line use is all about the toolkit and experience becomes a matter of choosing the right tool for the job at the time. This forum clearly shows, though, that there are many ways of using different tools to get the same end results.
 

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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 is used to invoke the grep on compress'ed or gzip'ed files. All options specified are passed directly to grep. If no file is speci- fied, 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 zgrep is invoked as zegrep or zfgrep then egrep or fgrep is used instead of grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. For example: for sh: GREP=fgrep zgrep string files for csh: (setenv GREP fgrep; zgrep string files) AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), egrep(1), fgrep(1), zdiff(1), zmore(1), znew(1), zforce(1), gzip(1), gzexe(1) ZGREP(1)
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