Using the sticky bit on a directory to control file access

Using the mkdir, MKDIR, or chmod command, you can set the sticky bit on a directory to control permission to remove or rename files or subdirectories in the directory. When the bit is set, a user can remove or rename a file or remove a subdirectory only if one of these is true:

• The user owns the file or subdirectory.
• The user owns the directory.
• The user has superuser authority.