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Man Pages


Manual Reference Pages  -  GCOMM (1)

NAME

comm - compare two sorted files line by line

CONTENTS

Synopsis
Description
Examples
Author
Copyright

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 \(aq(coreutils) comm invocation\(aq

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GNU coreutils 8.25 COMM (1) January 2016

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