5.2 Symbolic Modes
"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 (Note:
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
- 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.
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