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COMM(1) 			  User Commands 			 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.

     When FILE1 or FILE2 (not both) is -, read standard input.

     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

     --total
	    output a summary

     -z, --zero-terminated
	    line delimiter is NUL, not newline

     --help
	    display this help and exit

     --version
	    output version information and exit

     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.

AUTHOR
     Written by Richard M. Stallman and David MacKenzie.

REPORTING BUGS
     Report bugs to: bug-coreutils@gnu.org
     GNU coreutils home page: <https://www.gnu.org/software/coreutils/>
     General help using GNU software: <https://www.gnu.org/gethelp/>
     Report any translation bugs to <https://translationproject.org/team/>

COPYRIGHT
     Copyright (C) 2025 Free Software Foundation, Inc.	License GPLv3+: GNU  GPL
     version 3 or later <https://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.

SEE ALSO
     join(1), uniq(1)

     Full documentation <https://www.gnu.org/software/coreutils/comm>
     or available locally via: info '(coreutils) comm invocation'

GNU coreutils 9.9		  November 2025 			 COMM(1)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=gcomm&sektion=1&manpath=FreeBSD+Ports+15.1.quarterly>

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