User Commands                                             comm(1)



NAME
     comm - select or reject lines common to two files

SYNOPSIS
  /usr/bin/comm
     /usr/bin/comm [ options ] file1 file2

  ksh93
     comm [ options ] file1 file2

     
DESCRIPTION
     comm reads two files file1 and file2 which should be ordered in
     the collating sequence of the current locale, and produces three
     text columns as output:
       1     Lines only in file1.
       2     Lines only in file2.
       3     Lines in both files.

     If lines in either file are not ordered according to the
     collating sequence of the current locale, the results are not
     specified.

     If either file1 or file2 is -, comm uses standard input starting
     at the current location.



OPTIONS
     The following options are supported:

     -1              Suppress the output column of lines unique to
                      file1.

     -2              Suppress the output column of lines unique to
                      file2.

     -3              Suppress the output column of lines duplicate in
                     file1 and file2.

     --man, --html, --nroff
                     Prints builtin manual page in either plain text,
                     HTML or nroff format.
     --help          Prints basic help information
     --version       Prints version information


OPERANDS
     The following operands are supported:

     file1    A path name of the first file to  be  compared.  If
              file1 is -, the standard input is used.



     file2    A path name of the second file to be  compared.  If
              file2 is -, the standard input is used.



USAGE
     See largefile(5) for the description of the behavior of comm
     when encountering files greater than or equal to 2 Gbyte ( 2
    **31 bytes).



SunOS 5.10           Last change: 3 Mar 2004                    1






User Commands                                             comm(1)



EXAMPLES
     Example 1: Printing a list of utilities specified by files

     If file1, file2, and file3 each contain  a  sorted  list  of
     utilities, the command

     example% comm -23 file1 file2  | comm -23 - file3

     prints a list of utilities in file1 not specified by  either
     of the other files. The entry:

     example% comm -12 file1 file2 | comm -12 - file3

     prints a list of utilities specified by all three files. And
     the entry:

     example% comm -12  file2 file3 | comm -23 -file1

     prints a list of  utilities  specified  by  both  file2  and
     file3, but not specified in file1.

ENVIRONMENT VARIABLES
     See environ(5) for descriptions of the following environment
     variables  that  affect the execution of comm: LANG, LC_ALL,
     LC_COLLATE, LC_CTYPE, LC_MESSAGES, and NLSPATH.

EXIT STATUS
     The following exit values are returned:

     0        All input files were successfully output as  speci-
              fied.



     >0       An error occurred.



ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | SUNWcsu                     |
    |_____________________________|_____________________________|
    | CSI                         | enabled                     |
    |_____________________________|_____________________________|
    | Interface Stability         | Standard                    |
    |_____________________________|_____________________________|




SunOS 5.10           Last change: 3 Mar 2004                    2






User Commands                                             comm(1)



SEE ALSO
     cmp(1), diff(1), ksh93(1), sort(1), uniq(1), attributes(5),
     environ(5), largefile(5), standards(5)




















































SunOS 5.10           Last change: 3 Mar 2004                    3