1. Virtual Machines

2. Virtual Machines
A virtual machine takes the layered approach to its logical conclusion. It treats hardware and the operating system kernel as though they were all hardware
A virtual machine provides an interface identical to the underlying bare hardware
The operating system host creates the illusion that a process has its own processor and (virtual memory)
Each guest provided with a (virtual) copy of underlying computer
The guess process is in fact an OS, and is how a single physical machine can run multiple OS concurrently, each in its own VM.

3. Virtual Machines History and Benefits
First appeared commercially in IBM mainframes in 1972
Fundamentally, multiple execution environments (different operating systems) can share the same hardware
Protect from each other
Some sharing of file can be permitted, controlled
Commutate with each other, other physical systems via networking
Useful for development, testing
Consolidation of many low-resource use systems onto fewer busier systems
“Open Virtual Machine Format”, standard format of virtual machines, allows a VM to run within many different virtual machine (host) platforms

4. Virtual Machines (Cont)
(a) Nonvirtual machine (b) virtual machine
Non-virtual Machine
Virtual Machine

5. VMware Architecture

6. Downloading and installing VMware and downloading Ubuntu Linux
Lab Project: Part 1
Downloading and installing VMware and downloading Ubuntu Linux

7. (a) downloading the virtualization software from VMware on your computer
Download VMware on your computer.
For PC’s, download and install the trial version of VMware Workstation.
Go to
For Mac’s download and install the trial version of VMware Fusion.
Click on the TRY FOR FREE button.
Click on the Download Now button to download the software.

8. (b) installing it and (c) also downloading Ubuntu Linux
Install VMware on your computer.
Don’t create a new virtual machine yet.
Download Ubuntu’s Linux distribution.
Go to:
You will be asked to save this file on your computer.

9. Before your lab session of week #12, you should be done with part 1.
Part 2: Creating a new virtual machine and installing Ubuntu Linux on it; Testing the new virtual machine
Before your lab session of week #12, you should be done with part 1.
During the lab, you will be given the instructions of part 2 and you will do it during the lab.