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Full Discussion: Reg expressions
Top Forums Shell Programming and Scripting Reg expressions Post 302488815 by citaylor on Tuesday 18th of January 2011 01:05:49 PM
Old 01-18-2011
If its relatively simple:
egrep "<tag>.*<tag>"

may well work.
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ZGREP(1)						      General Commands Manual							  ZGREP(1)

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 ( SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)

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