.TH COMM 1 sbase\-VERSION
.SH NAME
comm \- select or reject lines common to two files
.SH SYNOPSIS
.B comm
.RB [ \-123 ]
.IR file1
.IR file2
.SH DESCRIPTION
The comm utility reads
.IR file1
and
.IR file2,
which should be sorted lexically,
and produces three text columns as output: lines only in
.IR file1;
lines only in
.IR file2;
and lines in both files.
.SH OPTIONS
.TP
.BI \-1
Suppress printing of column 1
.TP
.BI \-2
Suppress printing of column 2
.TP
.BI \-3
Suppress printing of column 3
.SH SEE ALSO
.IR cmp (1),
.IR sort (1),
.IR uniq (1)