1COMM(1)                          User Commands                         COMM(1)
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NAME

6       comm - compare two sorted files line by line
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SYNOPSIS

9       comm [OPTION]... FILE1 FILE2
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DESCRIPTION

12       Compare sorted files FILE1 and FILE2 line by line.
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14       With  no  options,  produce  three-column  output.  Column one contains
15       lines unique to FILE1, column two contains lines unique to  FILE2,  and
16       column three contains lines common to both files.
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18       -1     suppress column 1 (lines unique to FILE1)
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20       -2     suppress column 2 (lines unique to FILE2)
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22       -3     suppress column 3 (lines that appear in both files)
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24       --check-order
25              check  that  the  input  is  correctly sorted, even if all input
26              lines are pairable
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28       --nocheck-order
29              do not check that the input is correctly sorted
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31       --output-delimiter=STR
32              separate columns with STR
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34       --help display this help and exit
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36       --version
37              output version information and exit
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39       Note, comparisons honor the rules specified by `LC_COLLATE'.
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EXAMPLES

42       comm -12 file1 file2
43              Print only lines present in both file1 and file2.
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45       comm -3
46              file1 file2  Print lines in file1 not in file2, and vice versa.
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AUTHOR

49       Written by Richard M. Stallman and David MacKenzie.
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REPORTING BUGS

52       Report comm bugs to bug-coreutils@gnu.org
53       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
54       General help using GNU software: <http://www.gnu.org/gethelp/>
55       Report comm translation bugs to <http://translationproject.org/team/>
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58       Copyright © 2010 Free Software Foundation, Inc.   License  GPLv3+:  GNU
59       GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
60       This  is  free  software:  you  are free to change and redistribute it.
61       There is NO WARRANTY, to the extent permitted by law.
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SEE ALSO

64       join(1), uniq(1)
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66       The full documentation for comm is maintained as a Texinfo manual.   If
67       the  info  and  comm  programs are properly installed at your site, the
68       command
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70              info coreutils 'comm invocation'
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72       should give you access to the complete manual.
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76GNU coreutils 8.5                November 2010                         COMM(1)
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