Manage package keys in Debian Linux systems
The apt-key command is used to manage package keys in Debian Linux systems. Each released deb package is authenticated via a key, and apt-key is used to manage these keys.
apt-key [command]
Management Command: APT key operation command.
apt-key list # List keys saved in the system.
apt-key add keyname # Add the downloaded key to the local trusted database.
apt-key del keyname # Delete the key from the local trusted database.
apt-key update # Update the local trusted database and remove expired/useless keys.