Access Control in Linux is a report written for the course Data-Security at the Technical University of Denmark. Covers a range of security related aspects in Linux and the traditional UNIX-scheme.
At this point a lot of Linux-distributions have matured a great deal, and now come with more options regarding access control (such as access control lists/ACLs). Some of the information in this report about what is not "yet" possible is therefore outdated, but the overall description of how access control works in Linux is still relavant. Also, some of the more exotic stuff like the purpose of the sticky-, setuid- and setgid-bits is summed up in a way that most people can understand, without the need to be a Linux expert (in which case you already know this stuff).
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