Fixing failed Update when using a Launchpad PPA (Geany)

I use the Geany Text Editor as my programing/txt file editor.  I installed it from a Launchpad PPA. When updating I kept getting the error "This requires installing packages from unauthenticated sources".  A quick Google search for this found this fix which worked.

Open a terminal window and type the following three steps;

Step 1.
sudo apt-get update
This will give you your KEYNUMBER that is giving you problems.
your failed KEYNUMBER will look something like 71240B8FB3641876.

Step 2.
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys KEYNUMBER 
Substitute KEYNUMBER with the your failed keys.

Step 3.
sudo apt-get update
click on OK when the Update Window appears.


That's it you should be good to go.  Sorry I fixed mine before I could get screen shots.