http://www.howtogeek.com/59839/how-to-reset-any-changes-to-your-ubuntu-computer-and-add-kiosk-mode/ https://help.ubuntu.com/community/BackupYourSystem#Backup_Utilities alguns notes da dell ubuntu vem com suporte nativo tbm... mas o melhor anti-cagada plus mega blaster é o bom e velho backup