It appears the public key for the precies-security and precise-updates package isn't available during the update. Adding it manually with
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 40976EAF437D05B5
worked for all but one package, java-package, which I simply removed.
It appears the public key for the precies-security and precise-updates package isn't available during the update. Adding it manually with
sudo apt-key adv --keyserver keyserver. ubuntu. com --recv 40976EAF437D05B5
worked for all but one package, java-package, which I simply removed.