It works on linux, the install is a .bin file like realplayer
Want to know more about a specific location? Dive right in -- Google Earth combines satellite imagery, maps and the power of Google Search to put the world's geographic information at your fingertips.

Works on: Duron 1GHz 256MB, Geforce 4MX 440 SE
Kernel 2.6.15 ck-7, Knoppix hd-install v3.7

Download Google Earth (Release 4 - BETA) & more pics on Google EarthOfficial site