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, and produces a three-column output, as follows:  lines only in file1; lines only in file2; and lines in both files.  The filename − means the standard input. 

OPTIONS

1 Suppresses lines only from file1. 

2 Suppresses lines only from file2. 

3 Suppresses lines in both file1 and file2. 

EXAMPLES

Flags 1, 2, and 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(1), diff(1), uniq(1)

INTEGRATED SOLUTIONS 4.2 BSD  —  1 August 1985