Changes

#Document and demonstrate a linux machine (virtual machine) for either question #1 or question #2 or question #3 (if you wish to demonstrate something in that category).  '''For Question 4:'''*You do not have to build the demonstration machine from scratch - in fact you should avoid building from scratch - as long as you reference your source. *The virtual machine can come from an external Internet site, but not a classmate. *The virtual machine should use a linux distribution other than the one we use as our host - it doesn't need complicated functionality - a linux appliance itself is fine. *Note: ideally your appliance will run on your Centos host as a virtual machine. *An alternate linux environment is usually ok (e.g. VMware player under Windows) or Parallels under OSX - please discussin advance with the Instructor.