Apple Mac OS X Server (Administrator’s Guide) - Manual (Page 207)

Sharing 207
Everyone
Everyone is any user who can log in to the file server: registered users, guests, anonymous
FTP users, and Web site visitors.
Privileges Hierarchy
If a user is included in more than one category of users, each of which has different
privileges, these rules apply:
m Group privileges override Everyone privileges.
m Owner privileges override Group privileges.
For example, when a user is both the owner of a shared item and a member of the group
assigned to it, the user has the privileges assigned to the owner.
Client Users and Privileges
Users of AppleShare Client software can set access privileges for files and folders they own.
Windows file sharing users can set folder properties, but not privileges.
Privileges in the Mac OS X Environment
If you are new to Mac OS X and are not familiar with UNIX, it is important to know that there
are some differences from the Mac OS 9 environment in how ownership and privileges are
handled.
To increase security and reliability, Mac OS X sets many system directories, such as /Library,
to be owned by the root user. Files and folders owned by root can’t be changed or deleted by
you unless you are logged in as the root user. Be careful when you log in as the root user
since changing system data can cause problems.
As mentioned above, files and folders are, by default, owned by the user who created them.
They inherit the privileges of the folder in which they are created. After they are created
items keep their privileges even when moved, unless the privileges are explicitly changed by
their owners or an administrator.
Therefore new files and folders you create are not accessible by client users if they are created
in a folder for which the users do not have privileges. When setting up share points, make sure
that items allow appropriate access privileges for the users with whom you want to share them.
Network Globe Contents
You can customize the directory structure and contents of the Network Globe for clients by
setting up automounting for share points. You can add system resources such as fonts and
preferences by automounting share points in specific directory locations.