On directories, the sticky bit prevents users from deleting or renaming files that they do not own.
Set this property on directory to
True in order to allow files renaming and deleting their owners only.
Set it to
False to allow files renaming and deleting to all users.
On some very old systems, the sticky bit was used to indicate that a file should be kept in memory after it is executed so it could be reused without reloading. That usage is now obsolete and the sticky bit is ignored on files.