comm(1)

NAME

   comm - compare two sorted files line by line

SYNOPSIS

   comm [OPTION]... FILE1 FILE2

DESCRIPTION

   Compare sorted files FILE1 and FILE2 line by line.

   When FILE1 or FILE2 (not both) is -, read standard input.

   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

   -z, --zero-terminated
          line delimiter is NUL, not newline

   --help display this help and exit

   --version
          output version information and exit

   Note, comparisons honor the rules specified by 'LC_COLLATE'.

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.

AUTHOR

   Written by Richard M. Stallman and David MacKenzie.

REPORTING BUGS

   GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
   Report comm translation bugs to <http://translationproject.org/team/>

COPYRIGHT

   Copyright  2016 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.

SEE ALSO

   join(1), uniq(1)

   Full documentation at: <http://www.gnu.org/software/coreutils/comm>
   or available locally via: info '(coreutils) comm invocation'

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Free and Open Source Software