Grep

grep (Global Regular Expression Print) is a command line utility that for a given a list of files or standard input to read, grep searches for lines of text that match one or many regular expressions, and outputs only the matching lines.

See also

• agrep — approximate grep to facilitate fuzzy string searching
• fgrep — fixed pattern searches
• egrep — for searches involving more sophisticated regular expression syntax
• ngrep — network grep
• rgrep — recursive grep
• pgrep — displays the processes whose names match a regular expression
• ugrep &mdsah; only do basic regexp string matching
• tcgrep — rewrite of grep which uses Perl regular expression syntax
• apachegrep — a Perl program to help webmasters go through their apache logs
• rexgrep — GUI frontend to grep
• webgrep — a set of 7 search utilities for web-masters