Apple Training Series Mac OS X Server Essentials, Second Edition

As in Mac OS X, when a user attempts to access a file or folder, the user account is compared

with the file or folder’s owner and group. If the user account is the owner, then the permis-

sions assigned to the owner are enforced, and the permissions for the group and everyone are

ignored for that account. If the user account is not the owner but is a member of the group,

then group permissions are enforced. If the account is neither the owner nor a member of

the group, everyone’s permissions are enforced. In an “owner-only delete” scenario such as

what may exist in a shared temporary scratch space, an authorized user has read-write access

to the file but only the owner can delete it. This option, known as the sticky bit, can be set

only at the command ...