User Commands                                             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.

     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

     --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
     Report comm bugs to bug-coreutils@gnu.org
     GNU             coreutils             home             page:



GNU coreutils 8.5    Last change: April 2010                    1






User Commands                                             COMM(1)



     <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
     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  redistri-
     bute  it.   There is NO WARRANTY, to the extent permitted by
     law.

SEE ALSO
     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    Last change: April 2010                    2