[$] Rich access control lists

Access control lists (ACLs) can implement finer-grained access permissionsfor files than the traditional Unix mode bits. Linux has ACL support, butthe POSIX ACLs supported by Linux now have been showing their age for a while. POSIX ACLs may soon besuperseded by a more capable mechanism known as RichACLs. Click below (subscribers only) fora look at RichACLs and what they bring to Linux.