grub: hashsum
16.3.32 hashsum
---------------
-- Command: hashsum --hash hash --keep-going --uncompress --check file
[--prefix dir]|file ...
Compute or verify file hashes. Hash type is selected with option
'--hash'. Supported hashes are: 'adler32', 'crc64', 'crc32',
'crc32rfc1510', 'crc24rfc2440', 'md4', 'md5', 'ripemd160', 'sha1',
'sha224', 'sha256', 'sha512', 'sha384', 'tiger192', 'tiger',
'tiger2', 'whirlpool'. Option '--uncompress' uncompresses files
before computing hash.
When list of files is given, hash of each file is computed and
printed, followed by file name, each file on a new line.
When option '--check' is given, it points to a file that contains
list of HASH NAME pairs in the same format as used by UNIX 'md5sum'
command. Option '--prefix' may be used to give directory where
files are located. Hash verification stops after the first
mismatch was found unless option '--keep-going' was given. The
exit code '$?' is set to 0 if hash verification is successful. If
it fails, '$?' is set to a nonzero value.
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