Finder 5.4 added support for file system permissions in January 1987, as part of the AppleShare release.

This includes concurrency control or locking of a remote file while a user is editing it, and file system permissions.

In Unix symbolic file system permission notation, the sticky bit is represented by the letter t in the final character-place.

These special files can be identified by the command which displays the type of the file in the first alphabetic letter of the file system permissions field.

The content of a user's home directory is protected by file system permissions, and by default is only accessible to that user and administrators.

Where file system permissions exist, "ordinary" users are only able to delete their own files, preventing the erasure of other people's work or critical system files.

POSIX and conventional Unix file system permissions are organized into three classes, user, group, and others.

Public access is controlled using the world readable flags and CGI execution by the world executable flags of the file system permissions.

Privilege separation can also be done by splitting functionality of a single program into multiple smaller programs, and then assigning the extended privileges to particular parts using file system permissions.

A network share is typically made accessible to other users by marking any folder or file as shared, or by changing the file system permissions or access rights in the properties of the folder.

Many such file systems also offer advanced features, such as deniable encryption, cryptographically secure read-only file system permissions and different views of the directory structure depending on the key or user ...

Prior to the development of RBAC, the Bell-LaPadula model (BLP) model was synonymous with MAC and file system permissions were synonymous with DAC.

The file system permissions of a symbolic link usually have relevance only to rename or removal operations of the link itself, not to the access modes of the target file which are controlled by the target file's own permissions.

The file typically has file system permissions that allow it to be readable by all users of the system (world-readable), although it may only be modified by the superuser or by using a few special purpose privileged commands.