This is maintained by the system and should be used only in emergencies. Negative rights in one list does not override access granted in another. There are several different ACL entry types. It usually grants additional access to system administrators. It allows one to easily specify that the rights on a link are to be in addition to the default rights specified in the directory.
Users have the option of removing such access .
ANY matches any user. At present, this entry type is not supported. It is not possible to verify that the user has not modified the software to claim someone else's identity. The Internet address can generally be considered accurate, though it too can be spoofed by a knowledgeable and determined attacker. Although this method might be used to provide security similar to that for the Berkeley R commands, it is not recommended that you install Prospero binaries setuid root until the sources have undergone careful scrutiny for possible security holes .