How to import PPA repository keys to Ubuntu
Sometime, one needs to add additional software repositories to the exisiting Ubuntu installion. I recently had to add “cinnamon” reposity to Ubuntu from the launchpad. Everthing worked well excet the software packages from the cinnamon repository did not get listed in the Ubuntu software list. It showed an error message that the key is not found. If you are not a techie or a geek then adding the key...