‫Instructor: Hi, within this lecture
‫we are going to discuss what is a virtual machine
‫and why do we need one in order to follow this course.
‫So we are going to work
‫with different kind of operating systems within this course.
‫For example, we can use a color Linux
‫which is a Linux version, a Linux distribution
‫which we will see in a couple of minutes, okay?
‫And in order to do that
‫you can either delete your own operating system
‫from your own computer
‫and install the other operating system
‫that you may want to use as a main operating system.
‫Or you can run it virtually using a software
‫called Virtual Box, for example.
‫So this virtual machines will allow us to use different kind
‫of operating systems anytime we need them.
‫For example, by using virtual machines, we can use Linux,
‫we can use Windows or other operating systems virtually
‫in our own machine whenever it's needed.
‫We can run multiple machines at once
‫and it will be much more safer for us to use
‫a virtual machine.
‫So if we kind of break it
‫or if we kind of do something wrong,
‫we can delete it and we can rebuild it within minutes
‫because it will be virtual.
‫So it's recoverable, we can go back to any state
‫that we want, anytime we want.
‫We can just install the latest version
‫or some different earlier version for task purposes.
‫So it allows us to do whatever we want freely
‫and it's literally free as well
‫because the Virtual Box is free
‫which is the software that we are going to use
‫in order to run our virtual machines.
‫And the virtual machines are free as well.
‫So this will be a very good idea
‫in order to follow this course.
‫And if you wonder what it looks like
‫it looks like something like this
‫you're going to see within a minute.
‫But as you can see, this is the Virtual Box,
‫the software that I was talking about.
‫And for example, I am running a Linux version over here
‫in my own machine, even though I'm using
‫a MacBook right now, I can see the color Linux over here.
‫So this is where, what you're going to do
‫with virtual machines.
‫And within the next section we are going to see
‫how we can install this Virtual Box and the other stuff,
‫and how we can do the settings for them
‫in order to run them efficiently on our own host computers.