TLDR
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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}}

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