----- Original Message -----
> From: "Paweł Cholewiński" <pawelcholewinski@???>
> Hi List,
> how to verify that SHA256SUMS file
> (https://files.devuan.org/devuan_jessie_beta/) is not changed (how to
> check its signature).

In the directory which contains both the downloaded iso and the SHA256SUMS
file, run this command:

sha256sum --check SHA256SUMS

That will output a check for each checksum in that file, so you will get
a lot of "file not found" messages. Look for the one for your downloaded
iso, which will hopefully say "OK".

-Rob