NAME
    comm - compare two sorted files line by line

SYNOPSIS
    comm [OPTION]... LEFT_FILE RIGHT_FILE

DESCRIPTION
    Compare sorted files LEFT_FILE and RIGHT_FILE line by line.

    -1   suppress lines unique to left file

    -2   suppress lines unique to right file

    -3   suppress lines that appear in both files

    --help display this help and exit

    --version
    output version information and exit

AUTHOR
    Written by Richard Stallman and David MacKenzie.

REPORTING BUGS
    Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT
    Copyright (C) 2002 Free Software Foundation, Inc.
    This is free software; see the source for copying conditions. There is
    NO warranty; not even for MERCHANTABILITY or FITNESS FOR  A PARTICULAR
    PURPOSE.

SEE ALSO
    The full documentation for comm is maintained as a Texinfo manual. If
    the info and comm programs are properly installed at your site, the
    command

    info comm

    should give you access to the complete manual.