fgrep,grep and egrep

Dave Howorth dhoworth at mrc-lmb.cam.ac.uk
Wed Jun 9 16:06:32 UTC 2010

Kaushal Shriyan wrote:
> can someone explain me about the usage of grep , fgrep and egrep
> with examples.
> In what contexts i should use which.

$ cat /bin/egrep
exec /bin/grep -E ${1+"$@"}

$ cat /bin/fgrep
exec /bin/grep -F ${1+"$@"}

The man page tells you what the -E and -F options do.

Basically, use whichever you find most natural.

Cheers, Dave

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