Symbolic modes represent changes to files’ permissions as
operations on single-character symbols. They allow you to modify either
all or selected parts of files’ permissions, optionally based on
their previous values, and perhaps on the current
umask as well
(see Umask and Protection).
The format of symbolic modes is:
where perms is either zero or more letters from the set ‘rwxXst’, or a single letter from the set ‘ugo’.
The following sections describe the operators and other details of symbolic modes.
|• Setting Permissions||Basic operations on permissions.|
|• Copying Permissions||Copying existing permissions.|
|• Changing Special Permissions||Special permissions.|
|• Conditional Executability||Conditionally affecting executability.|
|• Multiple Changes||Making multiple changes.|
|• Umask and Protection||The effect of the umask.|