comm.1

<B>Digital的Unix操作系统VAX 4.2源码</B>

.\" SCCSID: @(#)comm.1	8.1	9/11/90
.TH comm 1 
.SH Name
comm \- compare sorted data
.SH Syntax
.B comm
[\fB\-\fR\|[\fB123\fR\|]\|] \fIfile1 file2\fR
.SH Description
.NXR "comm command"
.NXR "file" "comparing"
.NXR "comparing files with comm"
The
.PN comm
command reads
.I file1
and
.I file2,
which should be ordered in ASCII collating sequence,
and produces a three column output: lines only in
.I file1;
lines only in
.I file2;
and lines in both files.
The file name `\-' means the standard input.
.SH Options
.IP \fB1\fR 0.3i
Suppresses column one: lines in file1 only.
.IP \fB2\fR 0.3i
Suppresses column two: lines in file2 only.
.IP \fB\3\fR 0.3i
Suppresses column three: lines in file1 and file2.  
.PP
Thus
.PN comm
.B \-12
prints only the lines common to the two files.
And
.PN comm
.B \-23
prints only lines in the first file but not in the second.  Finally,
.PN comm
.B \-123
is not an option.
.SH See Also
cmp(1), diff(1), diff3(1), diffmk(1), join(1), uniq(1)