1.\" Copyright (c) 1991, 1993
2.\" The Regents of the University of California. All rights reserved.
3.\"
4.\" This code is derived from software contributed to Berkeley by
5.\" the Institute of Electrical and Electronics Engineers, Inc.
6.\"
7.\" Redistribution and use in source and binary forms, with or without
8.\" modification, are permitted provided that the following conditions

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27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33.\" SUCH DAMAGE.
34.\"
35.\" @(#)cksum.1 8.1 (Berkeley) 6/29/93
36.\" $Id: cksum.1,v 1.2 1997/04/27 08:45:43 jmg Exp $
37.\"
38.Dd June 29, 1993
39.Dt CKSUM 1
40.Os BSD 4.4
41.Sh NAME
42.Nm cksum
43.Nd display file checksums and block counts
44.Sh SYNOPSIS
45.Nm
46.Op Fl o Op \&1 \&| \&2
47.Op Ar file ...
48.Sh DESCRIPTION
49The
50.Nm
51utility writes to the standard output three whitespace separated
52fields for each input file.
53These fields are a checksum
54.Tn CRC ,
55the total number of octets in the file and the file name.
56If no file name is specified, the standard input is used and no file name
57is written.
58.Pp

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153.Rs
154.%T "Computation of Cyclic Redundancy Checks Via Table Lookup"
155.%A Dilip V. Sarwate
156.%J "Communications of the \\*(tNACM\\*(sP"
157.%D "August 1988"
158.Re
159.Sh STANDARDS
160The
161.Nm
162utility is expected to be POSIX 1003.2 compatible.
163.Sh HISTORY
164The
165.Nm
166utility appeared in
167.Bx 4.4 .