I am studying for a Computer Security exam, and I am struggling to understand the following sample question.
'Explain the difference between running in ring 0 on x86 and running as UID 0 in Linux. Give an example of something that each one enables, but the other does not.'
My current understanding is that ring 0 on x86 is the most privileged OS level and that kernel code is run in ring 0. UID 0 is the linux superuser that can essentially run anything. With my current understanding of these concepts, I don't understand how to answer this question.
Please Note, this is NOT a homework question and is NOT something I will be graded upon, it is study material only.