The User-Mode Linux kernel gives you a virtual machine that may have
different hardware and software virtual resources than the physical
computer. Disk storage for the virtual machine is entirely contained
inside a single file on the physical machine. You can assign your
virtual machine only the hardware access you want it to have. With
properly limited access, nothing you do on the virtual machine can
change or damage your real computer or its software.
If you want to completely protect one user from another and yourself
from your users, this is yet another alternative to the solutions
suggested at the beginning of this chapter.
