To install Google Earth (stable) in Ubuntu 12.04, or Peppermint Three from this PPA:
http://www.ubuntuupdates.org/ppa/google_earth
(use the commands below, NOT the commands listed at the above link, or you’ll end up with 2 duplicate sources which will cause you issues in the future)
Open a terminal, and run these 4 commands in sequence:
wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -sudo sh -c ‘echo “deb http://dl.google.com/linux/earth/deb/ stable main” > /etc/apt/sources.list.d/google-earth.list’
sudo apt-get update
sudo apt-get install google-earth-stable
To uninstall …
sudo apt-get remove google-earth-stable
then optionally clear up the orphaned dependencies with:
sudo apt-get autoremove