V4/usr/man/man1/grep.1

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.sh NAME
grep \*- search a file for a pattern
.sh SYNOPSIS
.bd grep
[
.bd \*-v
] [
.bd \*-l
] [
.bd \*-n
] expression [input] [output]
.sh DESCRIPTION
.it Grep
will search the input file
(standard input default)
for each line containing the
regular expression.
Normally, each line found
is printed on the output file
(standard output default).
If the
.bd \*-v
flag is used,
all lines but those matching
are printed.
If the
.bd \*-l
flag is used,
each line printed is
preceded by its line number.
If the
.bd \*-n
flag is used,
no lines are printed,
but the number of lines that would
normally have been printed is reported.
If interrupt is hit,
the number of lines
searched is printed.
.s3
For a complete description
of the regular expression,
see ed(I).
Care should be taken when
using the characters
$ * [ ^ | ( ) and \\ in the regular
expression as they are
also meaningful to the shell.
(Precede them by \\)
.sh "SEE ALSO"
ed(I), sh(I)
.sh BUGS
Lines
are limited to 512 characters;
longer lines are truncated.