In this chapter you're going to be talking about security enhanced Linux SC.
Linux is essentially a labelling system.
If you remember nothing else all you want you to always remember that SCA Linux is about the labels.
So what exactly does this mean.
Well it simply means that everything on the system gets a label files directories use as processes pipes
sockets everything after that.
Well then go ahead and give SCA Linux a policy.
It's this combination of labels and policies that SC Linux uses to make access control decisions.
For example if you think of me as a person labelled as a man this means if I go into any public buildings
I'm only allowed to access the men's room because the policy is to allow men into the men's room and
we men into the women's toilet.
This is basically how I see Linux operates.
All objects on the system get labelled with a C Linux attributes and then policies control how objects
are able to access resources based on the labels.
Once again astutely Knox is all about levels which levels are then used by the kernel to make access
control decisions.