I’ve tried a lot of backup software for Ubuntu, but none was quite right for what i had in mind: simple interface, the ability to select the folders which to backup, auto backup, simple restore to a selected date and most important: to backup only the changed files and folders if a previous backup with the same files and folders already exist. That untill i found Simple Backup. It has all the qualities i mentioned above, plus the ability to make a large backup at the begining and then only backup what changed.