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Linux 2.6 - man page for comm (linux section 1)

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COMM(1) 				  User Commands 				  COMM(1)

       comm - compare two sorted files line by line

       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

       -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 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'.

       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.

       Written by Richard M. Stallman and David MacKenzie.

       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/>
       Report comm translation bugs to <http://translationproject.org/team/>

       Copyright  (C)  2010  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.

       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 8.5			  February 2011 				  COMM(1)
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