[leo@thinkleo2 ~]$ /opt/google/earth/free/google-earth
Google Earth appears to be running already. Please kill the
existing process, or delete /home/leo/.googleearth/instance-running-lock if this is an error.
[leo@thinkleo2 ~]$ rm /home/leo/.googleearth/instance-running-lock
[leo@thinkleo2 ~]$ /opt/google/earth/free/google-earth