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Virtual Machine:A Computer Within Your
Computer
Created By Elaine Bryskar
Have You Ever???
• Wanted to try another operating system?
• Wanted to try evaluation software?
• Wanted not worry about viruses on the Net?
Have You Ever???
• Wanted to access something on another computer on your network?
• Wanted a backup/recovery plan?
If You Answered Yes…
• Dreamer
• Sense of Adventure
• Don’t want to spend much money
Tasks from the PastPC Magazine February 2008
• Overcome Vista’s incompatibility with older applications– Such as games
• Run customized software that won’t work in today’s O/Ss
What Is Virtualization?
• Proven software technology
• Runs multiple operating systems and multiple applications on the same computer at the same time
• It is not dual-booting
• Can be used by anyone who uses a computer
What Companies?
• Microsoft
• IBM
• Sun
• HP
• VMWare
What Is A Server?
• Allows multiple client machines to connect and use applications at the same time
What Is A Virtual Machine?
• Tightly isolated software container that can run its own operating system as if it were a physical computer
• Behaves exactly like a physical computer• Contains its own virtual CPU, RAM, hard
drive, and network interface card (NIC).
What Is A Virtual Machine?Without A Host O/S installed
Virtualization Approach
• VMWare inserts a thin layer of software directly on host operating system
• This layer contains a virtual machine monitor that allocated resources dynamically
• Allows multiple O/Ss to run concurrently on single physical computer
What Is A Virtual Machine?With a Host O/S installed
» CPU. Memory, NIC, Hard Drive
Host Machine
Guest Machines
How Is It Important To Me?
• Runs on any x86-based machine
• Supports 64-bit O/Ss
• Installs like an application, wizard-driven
• Supports any VMWare or Microsoft virtual machine format
• Supports multiprocessors
Why Is It Important To Me?
• Run Windows, Linux, Solaris, Ubuntu on same machine
• Increase CPU utilization• Move virtual machines from one
computer to another– A VM is simply a file
• Capture the entire state of a VM and roll back to a prior state (Snapshot)
A Quick Review• Compatibility:
– VMs are compatible with all standard x-86 machines
• Isolation:– VMs are isolated from each other as if physically
separated
• Encapsulation– VMs encapsulate a complete computing
environment
• Hardware independence:– VMs run independently of underlying hardware
A Quick Review
• Encapsulation makes VMs incredibly portable, easy to image– Move and copy a VM image (file) just
like any other software file
• Save VM to any standard data storage medium– USB flash drive, another hard drive
A Quick Review:Hardware Independence
• Configure VM with virtual components different from underlying hardware– Move a VM from one kind of x86
machine to another without changing device drivers, OS, applications
Some Specifics:Software
• Windows Operating System– Windows XP Media Center SP2– Windows 2000 Server– Windows Server 2003
• VMWare Server VMs can run– Windows 3.1 – Vista– Ubuntu– Linux– DOS
Some Specifics:My Laptop Hardware
• RAM: 1.49 GB• CPU: 1.73 MHz• Hard Drive: 111GB
• Allocated – 512 MB RAM for VM Server with
Win2K installed– 8 GB Hard Drive Space
My Desktop
My Desktop
What Else Is On-Tap
• Browser Appliance add-on• Protect against viruses, adware, other
malware with Firefox in a VM. Leverages VM isolation to prevent downloaded malware from propagating to desktop
• Take a snapshot before browsing and wipe it away
• It’s free but other Appliances are not
Research Information
• VMWare Server and VMWare Player– Author: Dennis Zimmer– ISBN: 783952-291215
• Professional VMWare Server– Author: Eric Hammersley– ISBN: 780470-079881
Research Information
• www.vmware.com
• register.vmware.com/content/download-106.html– And, best of all, it’s FREE!– Register (by giving an email address)
and request as many serial numbers as you wish
• www.vmware.com/appliances
Would You Like a Copy?• Send me an email at
– [email protected]– Place the following in the subject line:
• TVCUG VM
• I will attach and forward the following:– 2008 TVCUG Virtual Machine.pps
• This file (1.6MB) can be run without PowerPoint
