gpg --keyserver pgpkeys.mit.edu --recv-key 010908312D230C5F gpg -a --export 010908312D230C5F | sudo apt-key add - sudo apt-get update The problem should now be fixed. If you are missing multiple keys, ...
Apt is more than just a software installer. The Debian/Ubuntu package manager can do much more. With these commands at your disposal, apt becomes more powerful. I've used Debian/Ubuntu-based ...