# 2.11BSD#431 - /usr/man/cat1/comm.0

    COMM(1)             UNIX Programmer's Manual		  COMM(1)

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

    SYNOPSIS
         comm [ - [ 123 ] ] file1 file2

    DESCRIPTION
         Comm reads file1 and file2, which should be ordered in ASCII
         collating sequence, and produces a three column output:
         lines only in file1; lines only in file2; and lines in both
         files.  The filename `-' 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), uniq(1)

    Printed 11/26/99	 April 29, 1985                         1

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