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 'LCCOLLATE'.
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.
GNU coreutils online help:
Report comm translation bugs to
AUTHOR
Written by Richard M. Stallman and David MacKenzie.
COPYRIGHT
Copyright © 2013 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later .
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.
GNU coreutils 8.22 October 2018 COMM(1)