Virtual Machine Guide PDF

What is a Virtual Machine? CPSC4240/6240 Dr. Lana Drachova (use with author’s permission only)  Lana Drachova C...

What is a Virtual Machine? CPSC4240/6240 Dr. Lana Drachova (use with author’s permission only)  Lana Drachova CPSC4240/6240 What is a Computer?  Electronic device that gets work (or fun) done:  desktop, laptop, cellphone, and even a fancy coffee maker...  Built from hardware: physical components, such as processor, memory, hard drive, network card…  Runs OS software that control hardware:  Windows, Linux, MacOS, Android, iOS, etc 2  Lana Drachova CPSC4240/6240 What is a Virtual Machine?  Software that runs in user space in the existing OS (host OS) as an independent process  Virtual environment that emulates a computer system with its own virtual (not physical) cpu, memory, network interface and storage.  Can house many different OSs simultaneously (guest OSs)  Virtual Machine Manager(VMM) is also called hypervisor. - Oracle VirtualBox and VMWare  VMM creates and runs your VM by creating a virtual interface identical to the host machine 3  Lana Drachova CPSC4240/6240 Img src: android.jlelse.eu 4  Lana Drachova CPSC4240/6240 Use of Guest OS resources by VM?  VMs use your physical computer resources Img src: www.actusdigital.com 5  Lana Drachova CPSC4240/6240 Other Related Terms  Type 2 VMM Usually emulates VM and underlying hardware, runs on host OS Oracle VirtualBox VM Ware Workstation  Type 1 VMM – “Bare metal” Runs on hardware directly (on bare metal) without underlying OS Appliance – a VM setup, pre-configured and packaged in open virtualization format (.OVF) that can be imported or exported 6  Lana Drachova CPSC4240/6240 Why use a VM?  Try out a new OS without installing it.  Run more than one OS at the same time.  Try a new application.  Test various applications, drivers, etc. in a safe environment.  You can easily create clones of the guest OS. 7