Im trying to figure out a nice backup system for my linux box.

I have heard of , ( not tried, still waiting on the hardware peices for the linux box to come.) , Ghostzilla.

If I on my linux box install ghostzilla ( is it even installable?! ) ,
Is there a way to make a image of the harddrive by commandline ?

Because then i can set cron to run this command every week to a server with tape backup etc, and i allways got an updated image file of my linux box.