COMM(1)              INTERACTIVE UNIX System              COMM(1)



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

          SYNOPSIS
               comm [ - [ 123 ] ] file1 file2

          DESCRIPTION
               The comm command reads file1 and file2, which should be
               ordered in ASCII collating sequence [see sort(1)], and pro-
               duces 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 prints nothing.

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



































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