$ gpg --import info@willuhn.de.asc $ gpg --verify syntax.zip.asc
gpg: Signature made <datum> using RSA key ID C0DB6C70 gpg: Good signature from "Olaf Willuhn "
gpg: WARNING: This key is not certified with a trusted signature! gpg: There is no indication that the signature belongs to the owner.
$ gpg --with-colons --list-keys "info@willuhn.de" $ gpg --trusted-key 5A8ED9CFC0DB6C70 --update-trustdb