Hi!
-1st:-
Today, all my GPG keys for authentication are lost and I cannot
import the "trusted.gpg" key because import the key is not possible.
Restore defaults of keys is not possible. I click "Restore Defaults" and
nothing is happen.
How can i restore default keys of Ubuntu Mate 20.04 LTS?
I cannot use Synaptic and Update-Manager anymore because the keys are gone.
-2nd:-
What does this mean and how can I repair it?
/usr/bin/apt-key: 59: rm: not found
Please help, thanks!