COMM
Section: User Commands (1)
Updated: December 2009
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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.
AUTHOR
Written by Richard M. Stallman and David MacKenzie.
REPORTING BUGS
Report comm bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
COPYRIGHT
Copyright © 2009 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 aqcomm invocationaq
should give you access to the complete manual.