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       When FILE1 or FILE2 (not both) is -, read standard input.
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16       With  no  options,  produce  three-column  output.  Column one contains
17       lines unique to FILE1, column two contains lines unique to  FILE2,  and
18       column three contains lines common to both files.
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20       -1     suppress column 1 (lines unique to FILE1)
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22       -2     suppress column 2 (lines unique to FILE2)
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24       -3     suppress column 3 (lines that appear in both files)
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26       --check-order
27              check  that  the  input  is  correctly sorted, even if all input
28              lines are pairable
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30       --nocheck-order
31              do not check that the input is correctly sorted
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33       --output-delimiter=STR
34              separate columns with STR
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36       --total
37              output a summary
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39       -z, --zero-terminated
40              line delimiter is NUL, not newline
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42       --help display this help and exit
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44       --version
45              output version information and exit
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47       Note, comparisons honor the rules specified by 'LC_COLLATE'.
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EXAMPLES

50       comm -12 file1 file2
51              Print only lines present in both file1 and file2.
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53       comm -3 file1 file2
54              Print lines in file1 not in file2, and vice versa.
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AUTHOR

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

60       GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
61       Report any translation bugs to <https://translationproject.org/team/>
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64       Copyright © 2020 Free Software Foundation, Inc.   License  GPLv3+:  GNU
65       GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
66       This  is  free  software:  you  are free to change and redistribute it.
67       There is NO WARRANTY, to the extent permitted by law.
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SEE ALSO

70       join(1), uniq(1)
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72       Full documentation <https://www.gnu.org/software/coreutils/comm>
73       or available locally via: info '(coreutils) comm invocation'
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77GNU coreutils 8.32               February 2021                         COMM(1)
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