zgrep
search possibly compressed files for a regular expression
TLDR
Grep a pattern in a compressed file (case-sensitive)
Grep a pattern in a compressed file (case-insensitive)
Output count of lines containing matched pattern in a compressed file
Display the lines which don’t have the pattern present (Invert the search function)
Grep a compressed file for multiple patterns
Use extended regular expressions (supporting ?, +, {}, () and |)
Print 3 lines of [C]ontext around, [B]efore, or [A]fter each match
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename. . .
DESCRIPTION
The zgrep command invokes grep on compressed or gzipped files. All 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 STATUS
Exit status is 0 for a match, 1 for no matches, and 2 if trouble.
BUGS
The following grep options are not supported: --dereference-recursive (-R), --directories (-d), --exclude, --exclude-from, --exclude-dir, --include, --null (-Z), --null-data (-z), and --recursive (-r).
SEE ALSO
AUTHOR
Charles Levert (charles@comm.polymtl.ca)