Wat (wie) is egrep - definitie

UNIX COMMAND LINE UTILITY

GREP; Fgrep; Egrep; Grep (Unix); Grepping; Rgrep; Globally search a regular expression and print; FGREP (command); FGREP; G/re/p; Pcregrep

EGREP

Extended Global Regular Expression Print (Reference: Unix, GREP)

egrep

<tool> An extended version of the Unix grep command. Egrep accepts extended regular expressions (REs) including "*" following multi-character REs; "+" (one or more matches); "?" (zero or one matches); "|" separating two REs matches either. REs may be bracketed with (). Despite its additional complexity, egrep is usually faster than fgrep or grep. (2004-07-20)

fgrep

<tool> A variant of the Unix grep command which searches for fixed (uninterpreted) strings rather than {regular expressions}. Surprisingly, this is not always faster. (1996-10-27)

Wikipedia

Grep

grep is a command-line utility for searching plain-text data sets for lines that match a regular expression. Its name comes from the ed command g/re/p (globally search for a regular expression and print matching lines), which has the same effect. grep was originally developed for the Unix operating system, but later available for all Unix-like systems and some others such as OS-9.

https://en.wikipedia.org/wiki/Grep