.TH sum "" "" Command
.PC "Print checksum of a file"
\fBsum [\fIfile ...\^\fB]\fR
.PP
.B sum
prints an unsigned integer checksum and a
size in blocks (rounding up) for each
.I file
specified.
If more than one
.I file
is specified,
.B sum
also prints the file name.
If no
.I file
is specified,
.B sum
reads
the standard input.
.PP
.B sum
may be used to verify the integrity
of data transferred across phone lines
or stored on an unreliable medium.
.SH "See Also"
.Xr "cmp," cmp
.Xr "commands" commands
