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(fileutils.info)Symbolic Modes

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Symbolic Modes
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   "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:

     [ugoa...][[+-=][rwxXstugo...]...][,...]

   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.