You've all been experiencing some of the joys of system administration, through installing/configuring various packages, exploring new functionality, and better understanding some of the inner workings of the system.
I've made available another virtual machine for playing with in the UNIX class: vm34.student.lab (I made a “unix” account with the same password).
Now, I give you some additional tasks with which to explore:
Remember, asking questions is a good thing.