On Thursday, 24 December 2020 02:29:51 GMT Γιώργος Κωστόπουλος wrote:

> THANKS Michael for your help!!!
> 
> What confused me, was the "failed" results and the warnings of the
> sha512sum  command.
> 
> THANKS AGAIN for the clarification!!!  :-)
> G.

You're welcome.

The command 'sha512sum -c' you ran succeeded in checking any sha512 hashes in 
the file and reported "OK".  I just had a look at the contents of this file. 
The other lines, for which the sha512 check reports a "FAILED" warning use the 
whirlpool hash.  To check the whirlpool hashes of the files you can run:

whirlpool-hash -c install-amd64-minimal-20201222T005811Z.iso.DIGESTS.asc

The lines containing the sha512 hashes will now show "FAILED".  If you want to 
check all hashes in one go, you can use the rhash (Recursive  Hasher) command:

rhash -c install-amd64-minimal-20201222T005811Z.iso.DIGESTS.asc