Google earth according to wikipedia is: "... virtual globe program that was originally called Earth Viewer and was created by Keyhole, Inc. It maps the earth by the superimposition of images obtained from satellite imagery, aerial photography and GIS 3D globe. It is available under three different licenses: Google Earth, a free version with limited functionality; Google Earth Plus ($20 per year), which includes additional features; and Google Earth Pro ($400 per year), which is intended for commercial use"
So, how could we install it on our Debian or Ubuntu system?, it is really easy now.
First we need to Google Earth package, to be able to create the .deb file.
sudo aptitude install googleearth-package
Then create the .deb file.
Now install you recently created .deb file.
sudo dpkg -i googleearth_184.108.40.20630+0.5.2-1_i386.deb
Your .deb file name could be different depending on your architecture and the version of Google Earth available by the time of your installation.