Section 1 · User commands

comm.1

Package: coreutils-common

COMM

NAME
SYNOPSIS
DESCRIPTION
EXAMPLES
AUTHOR
REPORTING BUGS
COPYRIGHT
SEE ALSO

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 © 2024 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.