COMM(1)             RISC/os Reference 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 [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 prints nothing.

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



































                        Printed 11/19/92                   Page 1