I am need of updating my Ubuntu(using 18.04.4 LTS) machine so I can update NodeJS to the latest version.
Whenever I run 'sudo apt update' I get this error:
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY {A KEY IS HERE}
I get it for two keys.
When I use the command below it works for one key but I still get the same errors when running the update command again.
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys {KEY}