Torgeek
What is Keyserver in GPG?
The key server to which to send the keys is specified with the command-line option --keyserver. Similarly, the option --recv-keys is used to retrieve keys from a keyserver, but the option --recv-keys requires a key ID be used to specify the key.
What is apt key adv?
The apt-key 's manual explains this well. adv. Pass advanced options to gpg. With adv --recv-key you can e.g. download key from keyservers directly into the trusted set of keys.
