NAME

comm − print lines common to two files

SYNOPSIS

comm [ − [ 123 ] ] file1 file2

DESCRIPTION

Comm reads file1 and file2, which should be in sort, 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 (I), diff (I)

BUGS