A department needs a directory that can be used to exchange files between department members without allowing other employees access to the files. The department’s employees are part of different UNIX groups and company policy dictates a umask of 007.
You create a new UNIX group named shareit, and make the department’s employees part of this group.
You also change the ownership of the directory to this group, and set the mode to 0770.
What additional setting should you apply?
chmod u+s dir
chmod g+s dir
chmod g+t dir
chmod u+t dir