


      COMM(1)                     (UNIX 5.0)                    COMM(1)



      NAME
           comm - select or reject lines common to two sorted files

      SYNTAX
           comm [ - [ 123 ] ] file1 file2

      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.  The file name - means the standard
           input.

           Flags 1, 2, or 3 suppress printing of the corresponding
           column.  Thus comm -12 prints only the lines common to the
           two files; comm -23 prints only lines in the first file but
           not in the second; comm -123 is a no-op.

      SEE ALSO
           cmp(1), diff(1), sort(1), uniq(1).



































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