Hi Robert,
I guessed that sudo was missing was part of it but I thought there was a problem with the keys which might be important. "not ultimately trusted keys found"
This means that gpg can't locate any key it considers to have full/ultimate trust[0] (usually this is your own key if you've generated one). It doesn't indicate an error in this case; from the output you posted, the package signing key was imported successfully.
Sharif
[0]: In the context of the PGP web of trust: https://en.wikipedia.org/wiki/Web_of_trust