COMM(1)

NAME
comm - compare two sorted files line by line

SYNOPSIS
comm [OPTION]... FILE1 FILE2

DESCRIPTION

Compare sorted files FILE1 and FILE2 line by line.

With no options, produce 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.

-1  suppress column 1 (lines unique to FILE1)

-2  suppress column 2 (lines unique to FILE2)

-3  suppress column 3 (lines that appear in both files)

--check-order
    check that the input is correctly sorted, even if all input lines are pairable

--nocheck-order
    do not check that the input is correctly sorted

--output-delimiter=STR
    separate columns with STR

--help
    display this help and exit

--version
    output version information and exit

Note, comparisons honor the rules specified by 'LC_COLLATE'.

EXAMPLES

comm -12 file1 file2
    Print only lines present in both file1 and file2.

comm -3 file1 file2
    Print lines in file1 not in file2, and vice versa.

GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report comm translation bugs to <http://translationproject.org/team/>

Packaged by Cygwin (8.23-4) Copyright © 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

AUTHOR
Written by Richard M. Stallman and David MacKenzie.

SEE ALSO
join(1), uniq(1)

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 coreutils 'comm invocation'

should give you access to the complete manual.