3
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://deb.playonlinux.com precise InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 73F0D6E88E3D6C3A
W: Failed to fetch http://deb.playonlinux.com/dists/precise/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 73F0D6E88E3D6C3A
W: Some index files failed to download. They have been ignored, or old ones used instead.
2
  • apt uses GPG to verify cryptographic signatures on packages that it downloads, to prevent tampering. The error sounds like you are missing key 73F0D6E88E3D6C3A from the keyring. I don't know how to manually update the keyring list though.
    – rlee827
    May 31 '17 at 2:49
  • It looks like you are using Ubuntu 12.04. Can you confirm this?
    – fosslinux
    May 31 '17 at 3:15
5

You should add "playonlinux" repository's public key:

wget -q "http://deb.playonlinux.com/public.gpg" -O- | sudo apt-key add -

after that run :

sudo apt update

from playonlinux download page.

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