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://manned.org/apt-key.8.

• 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