How do I get rid of the NO_PUBKEY warning when updating from a PPA

Created by Christian Reis
ppa apt gpg download

If you've enabled a PPA in your local configuration (via software sources, synaptic or /etc/sources.list directly) when you update your packages you may get a warning that looks like this:

  W: GPG error: jaunty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 632D16BB0C713DA6

This message means you need to import the repository key into your local apt keyring. Details are at but the summary is that solving the problem above would just require issuing this command in your prompt:

  sudo apt-key adv --keyserver --recv-keys 632D16BB0C713DA6