BTW: Please re-read the PPA instructions for how to add keys for repositories. The right command would be
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 0x8420FEF1DD2B0027
BTW: Please re-read the PPA instructions for how to add keys for repositories. The right command would be
sudo apt-key adv --keyserver keyserver. ubuntu. com --recv-keys 0x8420FEF1DD2B0027