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This is the BSDA Study Guide Book written via a wiki collaboration. This is a work in progress. You may contribute to or discuss this specific page at http://bsdwiki.reedmedia.net/wiki/Recognize_alternate_authorization_schemes.html. Recognize alternate authorization schemes Concept Admins should understand basic authorization theory and how MAC and ACLs extend the features provided by the standard Unix permissions. Introduction TODO: is this section needed? is "mandatory" controls introduced elsewhere? See section View and modify ACLs for more information on ACLs, including ACL attributes. Note that standard Unix permissions can also be extended by using file flags as covered in section View and modify file flags. Examples Practice Exercises More information mac(4) and acl(3) on FreeBSD; systrace(1) on NetBSD and OpenBSD