NAME
comm - compare two sorted files line by line
SYNOPSIS
comm
[-123] [--help] [--version] file1 file2
DESCRIPTION
This manual page
documents the GNU version of
comm.
comm
prints lines that are common, and lines that are unique, to two input
files. The two files must be sorted before
comm
can be used. The file name `-' means the standard input.
With no options,
comm
produces three column output. Column
one contains lines unique to
file1,
column two contains
lines unique to
file2,
and column three contains lines common to both files.
OPTIONS
The options
-1,
-2,
and
-3
suppress printing of the corresponding columns.
-
--help
-
Print a usage message and exit with a status code indicating success.
-
--version
-
Print version information on standard output then exit.