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Top Forums Shell Programming and Scripting One instance of comparing grep and awk Post 302979678 by MadeInGermany on Wednesday 17th of August 2016 02:43:17 PM
Old 08-17-2016
I prefer awk, because I know it well, so there is little effort to make it precise and efficient.
For extreme robustness (e.g. long input lines) I go with perl. But usually takes longer till it does what I want.
For a "work on fields" task grep is often unprecise, or the readability and extend-ability are worse.
 

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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 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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