http://ubuntuforums.org – The goal that is to be achieved is the securing of Grub, that is, preventing standard users to fiddle with its terminal, edit its command lines, or enter the much-powerful recovery mode. A fresh Quantal install was performed, which is the only operating system to be installed, and BIOS and the boot order and been taken care of, in addition to limiting users to "standard" accounts. (Physical machine intrusions are in this case not to be worried about, for it to be noted.) https://help.ubuntu.com/community/Grub2/Passwords http://www.gnu.org/software/grub/man.../Security.html (Hardware)