apt-key

Key management utility for the APT Package Manager on Debian and Ubuntu. Note: apt-key is now deprecated (except for the use of apt-key del in maintainer scripts). More information: https://manpages.debian.org/latest/apt/apt-key.8.html.

List trusted keys:

apt-key list

Add a key to the trusted keystore:

apt-key add {{public_key_file.asc}}

Delete a key from the trusted keystore:

apt-key del {{key_id}}

Add a remote key to the trusted keystore:

wget -qO - {{https://host.tld/filename.key}} | apt-key add -

Add a key from keyserver with only key id:

apt-key adv --keyserver {{pgp.mit.edu}} --recv {{KEYID}}