Thanks for your interest, nizar!
Actually the easiest way to get Geolizer working under Linux is to grab the geolizer_2.01-10-static-linux.20070115.tar.gz file. It contains a pre-compiled version (for x86-based computers), which is supposed to work almost "out-of-shelf"
You just need to specify the location of the GeoIP database; or put it into some standard place. For lots of details, check the "Installation (Binary)" section in the INSTALL file I supply with every package of Geolizer!
Good luck!