Introduction to Virtualization and Operation Systems
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Hello. My name is Dustin, and welcome to virtual ization and operating systems.
You will have a few learning objectives. The 1st 1 you'll learn is what, What virtualization ISS. You'll also learn the difference between a client OS and a server OS and patching Who does that.
So virtual ization virtualization takes physical hardware and turns it into virtual hardware. You converge allies anything from, ah, single PC or operating system to entire networks.
So again, virtually is, um,
allows you one computer to do the job off multiple computers. You can run several virtual machines on one computer.
It takes those physical resource is and turned them into virtual resource is. And when you're running multiple virtual machines, you can create a completely isolated environments
it allows. Multiple OS is operating systems and workloads to run on the same physical hardware a lot more efficiently,
so there are a few terms I may be mentioned that you may or may not be familiar with. Um, the 1st 1 is the host OS or host machine, and that's the operating system that is running on your current machine at all times. So that's like your windows or your Mac or Linux OS.
Your guest OS is the virtual operating systems running on top of your host machine.
VM is just short for virtual machine. It's a lot easier to say so I'll be saying that a lot
snapshot point in time capture of the exact current state of a virtual machine.
And you can use snapshots to clone or restore your V EMS
and then also, ah, hyper Visor Hyper Visors, a software that runs and manages multiple operating systems. So there's two types of hyper visors. Type one, which is like a bare metal hyper visor, which isn't sold directly on top of the physical host hardware.
These typically run on dedicated hardware and are used in data centers
tight, too. Hyper visors are a little more common, depending on what you do on, and they're also known as a hosted hyper visor, so they'll run on top of your operating system.
Virtualization software. There's a lot of software out there about three. The most common forms of virtual eyes is the soft for you'll encounter are hyper V, Virtual box and VM, where
hyper V comes from Microsoft and is available on Windows 10 Enterprise Pro or education, and also I need the server versions as well. Technically, this is a type one hyper visor as it's not installed on top of the O s when you enable it in server
or any of the Windows operating system, it's actually installed below. The Windows Os
than excellent is Oracle Virtual Box. It's available for free from Virtual Box son work and can run on any operating system Windows, Lennox or Mac.
And since it's in tall, installed on top of an operating system, it's a tight, too hyper visor,
another common one. You may run into his VM where and that has both free and paid versions. Although the free VM play of Ian, where player can only run one virtual machine at a time again, this one is installed on top of the OS, meaning it is also a type to hyper visor.
So why virtualized? Most modern computers under utilized? Their current resource is RAM CP, the CP processing power, hard drive space, everything running several virtual machines on your host machine can increase efficiency and allow for better multi tasking
manageability. The ability to move copy and isolate V EMS so you can move your V EMS from one pc to another. Store them on actual hard drive. If you've got any hard will failures,
you can move them to a new machine. So it's like having the full tiny computer wherever you go. As long as you've got the ability to run it, of course
availability. You can run redundant VMS allowing for really good up time. That's what you'll see it in data centers a lot. You can also create snapshots or clone your V EMS, allowing you to restore them to any point in time. If something happens
you can isolate your host machine from your V EMS and isolate applications. I always have a sandbox, me and where I can play with their tools or malware, and I don't have to worry about my anything happening to my host OS and rebuilding my machine. I could just spend up a new virtual machine.
So here you've got a couple diagrams on the left, you'll see a traditional computer system.
You've got your hardware down on the bottom with your CPU, remembering your hard drive everything like that. On top of that, you've got your OS, your operating system and then finally, on top of that, you've got your application layer
on the right. We've got our hardware again. And then on top of that, you got your virtual ization layer. And as you can see, you can run multiple operating systems and application layers.