COMM(1)                              SysV                              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).