4.3BSD - /usr/man/cat1/comm.0

COMM(1)                                                                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)


7th Edition                     April 29, 1985                         COMM(1)