You maybe didn’t know Google provides a flight simulator within its Google Earth program, what you certainly didn’t know was that also linux version of this program does have the flight simulator!

While it is really easy to enable such feature in Windows and Mac (just type CTRL+ALT+A) in linux this shortcut does not work since X on most of systems has mapped it otherwise.

The solution is really easy, all you have to do is going into this directory

$HOME/.googleearth/Registry/google/googleearthplus/User/flightsim

and create an empty file called isenabled, then edit it typing in value 1.

After you have done so you’ll be able to access this feature via Tools menu.
Reference for shortcuts used into this game is available here:

http://earth.google.com/intl/en/userguide/v4/flightsim/index.html