comm (1)
NAME
comm - compare two sorted files line by lineSYNOPSIS
comm [OPTION]... FILE1 FILE2DESCRIPTION
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.
AUTHOR
Written by Richard M. Stallman and David MacKenzie.REPORTING BUGS
Report comm bugs to bug-coreutils@gnu.orgGNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report comm translation bugs to <http://translationproject.org/team/>
COPYRIGHT
Copyright © 2013 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.
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.