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What is Linux? So of course, we are going to learn
Linux, but you do want to know what exactly Linux
is? Linux is an operating system. It's just like
any other operating system. For example, Microsoft
has Windows. Apple has Mac, Sun which is now owned
by Oracle, they have Solaris running on Spark
hardware. So Linux is an operating system, which
sits in the middle of your hardware and the users.
And the users are the ones who run the
applications. So it's like a middleman or a bridge
that takes the commands from users and translate
them to hardware. So look at this picture. So you
see a computer, right? So if without an operating
system, this computer is considered like a dumb
terminal, it doesn't do anything. So how does it
work? So we have this terminal, which is of course
a piece of brick, you open the tray of that
computer, you insert your CD or DVD and that CD or
DVD has the operating system image sitting on it,
whether it's Windows, or Linux, or whichever
operating system that you are installing. So you
boot your computer from that operating system. So
once you're booting it up, it goes through the
installation process. That installation process is
going to ask you a bunch of questions like how do
you want the operating system to be configured?
How do you want your disk partition? How do you
want how many users you want to have installed and
so on. So once the installation is done, then at
the end of the installation, it's going to ask you
to reboot, you reboot the computer, and it comes up
to the welcome screen. And it'll say welcome to
Linux, or welcome to Windows or whichever
operating system that you're installing. So then
you could attach external devices to it for
example, you could attach keyboard to it, you
could attach mouse to it. So, you use these mouse
and keyboards, you type a certain command, certain
you use applications and type them and then you
send it to your operating system. Then your
operating system takes those commands and
forward it to other hardware or other system
peripherals. So some of them are for example, we
have printer. So if you are running an
application, for example, you're, running Microsoft
Word, you type it in with your keyboard, and then
you want to print that document right. So the
operating system will take that document and send
it to your printer and your printer will spit out
the document that you want to print. Or if you're
running other programs, for example, you are
online, you're checking your email or you are
running some online program or even games. So you
are using your keyboard or your mouse, you are
communicating with your operating system and the
heart operating system communicates with your
hardware and that's how it communicates to other
devices on the network.
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