COMM(1) (Directory and File Management Utilities) 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).
Page 1 May 1989