How to fix: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY [closed]

I was able to resolve this with:

apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 605C66F00D6C9793 \
    0E98404D386FA1D9 648ACFD622F3D138

Looks like the ubuntu servers also contain the debian keys.