How do you identify the ownership and permissions of a file or folder in the Finder?

How do ACLs differ from standard UNIX file system permissions?

What is the locked file flag?

Why is the root, or beginning, level of a user’s home folder visible to other users?

How does the default organization of the file system allow users to safely share local files and folders?

What is unique about the permissions of the /Users/Shared folder?

What does it mean when you choose the option to “ignore volume ownership” in the Finder? What are the security ramifications of ignoring volume ownership?