coreutils: Symbolic Modes

1 
1 27.2 Symbolic Modes
1 ===================
1 
1 “Symbolic modes” represent changes to files’ mode bits as operations on
1 single-character symbols.  They allow you to modify either all or
1 selected parts of files’ mode bits, optionally based on their previous
11 values, and perhaps on the current ‘umask’ as well (⇒Umask and
 Protection).
1 
1    The format of symbolic modes is:
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1      [ugoa...][-+=]PERMS...[,...]
1 
1 where PERMS is either zero or more letters from the set ‘rwxXst’, or a
1 single letter from the set ‘ugo’.
1 
1    The following sections describe the operators and other details of
1 symbolic modes.
1 

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