The commands sha224sum, sha256sum,
sha384sum and sha512sum compute checksums of
various lengths (respectively 224, 256, 384 and 512 bits),
collectively known as the SHA-2 hashes.
If a file is specified as ‘-’ or if no files are given
sha???sum computes the checksum for the standard input.
sha???sum can also determine whether a file and checksum are
consistent. Synopsis:
sha???sum [option]… [file]…
sha???sum uses the ‘Untagged output format’
for each specified file, as described at cksum output modes.
The program accepts cksum common options. Also see Common options.