Name
egrep
Synopsis
egrep [options
] [regexp
] [files
]
Searches one or more files for lines that match
an extended regular expression regexp.
egrep
doesn’t support the regular
expressions \(, \), \n, \<, \>, \{, or \},
but does support the other expressions, as well as the extended set
+
, ?
, |
, and
(
)
. Remember to enclose these
characters in quotes. Regular expressions are described in Chapter 20. Exit status is 0 if any lines match, 1 if
none match, and 2 for errors.
See grep
for the list of available options. Also
see fgrep
. egrep
typically runs
faster than those commands.
Examples
Search for occurrences of Victor or Victoria in file:
egrep `Victor(ia)*'
fileegrep `(Victor|Victoria)'
file
Find and print strings such as old.doc1 or new.doc2 in files, and include their line numbers:
egrep -n `(old|new)\.doc?'
files
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