comm(1)

NAME
     comm - print lines common to two sorted files

SYNOPSIS
     comm [-123] file1 file2

OPTIONS

     -1   Suppress column 1 (lines present only in file1)

     -2   Suppress column 2 (lines present only in file2)

     -3   Suppress column 3 (lines present in both files)

EXAMPLES

     comm file1 file2    # Print all three columns

     comm -12 file1 file2
                         # Print only lines common to both files

DESCRIPTION

     Two sorted files are read  and  compared.   A  three  column  listing  is
     produced.   Files  only in file1 are in column 1; files only in file2 are
     in column 2; files common to both files are in column 3.  The file name -
     means stdin.

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