i am a linux newbie. 1: is there a device manager in fedora/mandriva to see if all drivers are recognised after install? 2:what should we do if linux freezes while doing system upadate or something like that.I did a reboot in ubuntu and system became unusable. 3: is it possible to create a checkpoint or something like that while doing system updates etc so that we can rollback to previous state if there is a problem? 4:if we update fedora9 perfect desktop to 10 using yum/preupdate will it work or will it become unstable?how steps to take while updating,like backup etc?