comm(1)                                                   comm(1)



NAME
     comm - selects or rejects lines common to two sorted files

SYNOPSIS
     comm [- [1] [2] [3]] file1 file2

ARGUMENTS
     -    Specifies the standard input.

     1    Suppresses printing of the first column.

     2    Suppresses printing of the second column.

     3    Suppresses printing of the third column.

     file1
          Specifies the first sorted file.

     file2
          Specifies the second sorted file.

DESCRIPTION
     comm reads file1 and file2 which should be ordered in ASCII
     collating sequence (see sort(1)), and produces a three-
     column output: lines only in file1, lines only in file2, and
     lines in both files.

EXAMPLES
     The command:

        comm -12 filea fileb

     prints only the lines common to filea and fileb.  The
     command:

        comm -23 filea fileb

     prints only lines in the first file but not in the second.
     The command:

        comm -123 filea fileb

     is not an option, as it suppresses all output.  The command:

        comm -3 filea fileb

     prints only the lines that differ in the two files.

FILES
     /usr/bin/comm
          Executable file




January 1992                                                    1

comm(1)                                                   comm(1)



SEE ALSO
     bdiff(1), cmp(1), diff(1), diff3(1), diffmk(1), sort(1),
     uniq(1)




















































2                                                    January 1992