Man Pages – Linux Manual Pages

grep, egrep, fgrep – print lines matching a pattern
USAGE
grep [options] PATTERN [FILE...]
grep [options] [-e PATTERN | -f FILE] [FILE...]

DESCRIPTION
Grep searches the named input FILEs (or standard input if no files are
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cvs – Concurrent Versions System
USAGE
cvs [ cvs_options ]
cvs_command [ command_options ] [ command_args ]

NOTE
This manpage is a summary of some of the features of cvs but [...]