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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
       GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
       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 9.6		 January 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+14.3.quarterly>

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