Grep
grep is a command line utility originally written for use with the Unix operating system. The name comes from a command in the text editor ed that takes the form regular expressionstandard inputagrep to facilitate fuzzy string searching, fgrep for fixed pattern searches and egrep for searches involving more sophisticated regular expression syntax. All these variations of grep have been ported to many computer operating systems.The Perl programming language provides a pattern matching function named grep.
Grep is often used as a verb, a synonym of search, e.g., "I grepped the Wikipedia for an article on Unix searching and found it here."
