Ubuntu, poruka GPG greške: NO_PUBKEY 531EE72F4C9D234C isl.
1. Terminal:
sudo add-apt-repository ppa:webupd8team/y-ppa-manager
2.
sudo apt-get update
3.
sudo apt-get install y-ppa-manager
4. Kliknite na "Advanced".
5. Označite "Fix all GPG Badsig errors" i kliknite "OK".