-c, --checkread SHA512 sums from the FILEs and check them--tag create a BSD-style checksum-t, --textread in text mode (default)The following three options are useful only when verifying checksums: --quietdon’t print OK for each successfully verified file...
dgstsum -d md2 -c md2out md2sum -c md2out -ddigesttype Specifies the digest format to be used when calculating message digests. The following formats may be specified fordigesttype: md2 md4 md5 mdc2 ripemd160 rmd160 sha sha1 sha224 sha256 sha384 sha512 whirlpool ...