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Plan 9 - man page for chmod (plan9 section 1)

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CHMOD(1)										 CHMOD(1)

       chmod - change mode

       chmod mode file ...

       The  mode of each named file is changed according to mode, which may be an octal number or
       a symbolic change to the existing mode.	A mode is an octal number constructed from the OR
       of the following modes.

       0400   read by owner

       0200   write by owner

       0100   execute (search in directory) by owner

       0070   read, write, execute (search) by group

       0007   read, write, execute (search) by others

       A symbolic mode has the form:

	      [who] op permission

       The  who  part is a combination of the letters u (for user's permissions), g (group) and o
       (other).  The letter a stands for ugo.  If who is omitted, the default is a.

       Op can be + to add permission to the file's mode, - to take  away  permission,  and  =  to
       assign permission absolutely (all other bits will be reset).

       Permission  is  any combination of the letters r (read), w (write), x (execute), a (append
       only), and l (exclusive access).

       Only the owner of a file or the group leader of its group may change the file's mode.


       ls(1), stat(2), stat(5)

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