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Full Discussion: sticky bit
Top Forums UNIX for Dummies Questions & Answers sticky bit Post 26206 by mma_buc_98 on Tuesday 13th of August 2002 02:52:27 PM
Old 08-13-2002
sticky bit

What command string would you use to set the sticky bit on a directory that you own?
 

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sticky(8)						      System Manager's Manual							 sticky(8)

Name
       sticky - executable files with persistent text

Description
       The sticky bit (file mode bit 01000), is used to indicate special treatment for certain executable files and directories.

       While the sticky bit, mode 01000 is set on a sharable executable file, the text of that file will not be removed from the system swap area.
       Thus the file does not have to be fetched from the file system upon each execution.  As long as a copy remains in the swap area, the origi-
       nal  text  cannot  be  overwritten  in  the file system, nor can the file be deleted.  Directory entries can be removed so long as one link
       remains.

       Sharable files are made by the and options of

       To replace a sticky file that has been used, clear the sticky bit with and execute the old program to flush the swapped copy.  This can	be
       done  safely  even  if others are using it.  Overwrite the sticky file.	If the file is being executed by any process, writing will be pre-
       vented.	It suffices to simply remove the file and then rewrite it, being careful to reset the owner and mode with and Set the  sticky  bit
       again.

       A  directory  whose  sticky bit is set becomes an append-only directory, or, more accurately, a directory in which the deletion of files is
       restricted.  A file in a sticky directory may only be removed or renamed by a user if the user has write permission for the  directory  and
       the  user  is the owner of the file, the owner of the directory, or the superuser.  This feature is usefully applied to directories such as
       which must be publicly writeable but should deny users the license to arbitrarily delete or rename each others' files.

Restrictions
       Only the superuser can set the sticky bit.

See Also
       chmod(2)

								       RISC								 sticky(8)

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