zegrep

Find extended regular expression patterns in compressed files using `egrep`.

TLDR

Search for extended regular expressions (supporting ?, +, {}, () and |) in a compressed file (case-sensitive)

$ zegrep "[search_pattern]" [path/to/file]
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Search for extended regular expressions (supporting ?, +, {}, () and |) in a compressed file (case-insensitive)

$ zegrep --ignore-case "[search_pattern]" [path/to/file]
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Search for lines that do not match a pattern

$ zegrep --invert-match "[search_pattern]" [path/to/file]
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Print file name and line number for each match

$ zegrep --with-filename --line-number "[search_pattern]" [path/to/file]
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Search for lines matching a pattern, printing only the matched text

$ zegrep --only-matching "[search_pattern]" [path/to/file]
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Recursively search files in a compressed file for a pattern

$ zegrep --recursive "[search_pattern]" [path/to/file]
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SYNOPSIS

zgrep [ grep_options ] [ -e ] pattern filename. . .

DESCRIPTION

Zgrep 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

grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

AUTHOR

Charles Levert (charles@comm.polymtl.ca)

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