Revoke a GPG key

gen-revoke send-keys

Source

• https://askubuntu.com/a/626549
• https://askubuntu.com/a/323309
• https://askubuntu.com/a/523361

• Generate a revocation certificate

  gpg --output <user>.<name>.revoke.asc --gen-revoke KEYID

• Import the revocation certificate (Note: This requires the public key to be present! If this is not the case yet, simply pull it from a server using gpg --recv-keys KEYID.)

  gpg --import <user>.<name>.revoke.asc

• Then send the key back to the server again

  gpg --keyserver keyserver.ubuntu.com --send-keys KEYID