.Dd January 30, 2015
.Dt SHA256SUM 1
.Os
.Sh NAME
.Nm sha256sum
.Nd compute SHA256 message digest
.Sh SYNOPSIS
.Nm
.Op Fl c
.Op Ar file ...
.Sh DESCRIPTION
Print SHA256 (256-bit) checksums. With no file, read standard input.
.Sh OPTIONS
.Bl -tag -width Ds
.It Fl c
read list of SHA256 checksums from file and check them
.El