.Dd 2015-10-08
.Dt CKSUM 1
.Os sbase
.Sh NAME
.Nm cksum
.Nd compute file checksum
.Sh SYNOPSIS
.Nm
.Op Ar file ...
.Sh DESCRIPTION
.Nm
calculates a cyclic redundancy check (CRC) of
.Ar file
according to
.St -iso8802-3
and writes it, the file size in bytes and path to stdout.
.Pp
If no
.Ar file
is given,
.Nm
reads from stdin.
.Sh STANDARDS
The
.Nm
utility is compliant with the
.St -p1003.1-2013
specification.