comm [OPTION]... FILE1 FILE2
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 lines unique to FILE1
-2 suppress lines unique to FILE2
-3 suppress lines that appear in both files
check that the input is correctly sorted, even if all input
lines are pairable
do not check that the input is correctly sorted
separate columns with STR
--help display this help and exit
output version information and exit
Note, comparisons honor the rules specified by `LC_COLLATE'.
Written by Richard M. Stallman and David MacKenzie.
Report comm bugs to firstname.lastname@example.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Copyright (C) 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.
The full documentation for comm is maintained as a Texinfo manual. If
the info and comm programs are properly installed at your site, the
info coreutils 'comm invocation'
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