It should do yes - I think it also overwrites any /boot
, /var
, etc partitions as well, as long as they are not /home
. To quote this:
Setting up /home on a separate partition is beneficial because your
settings, files, and desktop will be maintained if you upgrade,
(re)install Ubuntu or another distro. This works because /home has a
subdirectory for each user's settings and files which contain all the
data & settings of that user. Telling Ubuntu to use an existing home
partition can be done by selecting "Manual Partitioning" during the
installation of Ubuntu and specifying that you want your home
partitions mount point to be /home, ensure you mark your /home
partition not be formatted in the process.
So you should to be able to reinstall from other install disk types, e.g.
and other Ubuntu Derivatives. Whether they can automatically resinstall, or you have to do it manually, I don't know.
May I also mention that even though it is called Ubuntu Gnome, you can find a massive list of other Desktop Environments to Gnome here. Unity is the default one for Ubuntu.