1) Why is the su command terminated with exit? What is the difference between su and su - romeo?

2) How can you create another user with the same powers as root?

3) A user romeo belongs to the student group and yet /etc/group doesn't show his name beside the group name. What does that indicate?

4) How will you arrange for a group of users to write to the same directory and yet not be able to remove one another's files?

5) Why do we install the UNIX system on multiple partitions?