comm(1)                          DG/UX R4.11                         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 [see sort(1)], 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
       prints nothing.

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


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