[ Thanks to finid
for this link. ]
“Two of the four security features in Fedora 16 are enabled out
of the box. The others are optional features that can be configured
during installation. So, let us look at those two optional security
features first.“Boot Loader Password: Access to the boot loader’s console is
one of the easiest means to gain access to the innards of a system.
By password-protecting it, you make it that much difficult for an
unauthorized user to gain access at that level. The screen shot
below shows the boot loader setup step.”