There is a Ghost for Linux. It is not the same, but it does the same thing.
http://sourceforge.net/projects/g4l
linux.softpedia.com/.../Ghost-for-Linux-053.shtml
There are several system rescue live CDs as well that will do what you want. For
example, SystemRescueCd
http://www.sysresccd.org/
Clonezilla gets high marks from people who have used it. I haven't tried it,
though.