Welcome everybody to this tutorial. Today I'm just gonna go ahead and enter Red
Hat. We're not gonna do any more installations, or anything of a kind,
today we're jumping in. But, we're we're easing in it slowly. First, I want to
to show you the graphical user interface, and then we will move on to
the terminal. I first want to show you where is what, approximately. Before I do
all of that, I have made some alterations to the Red Hat virtual machine. I have
just assigned it more resources, and you can do the same by clicking on the
settings, and then going to system, and you have the motherboard processor
acceleration, and these things you can only change while the machine is down. So,
once you power the machine up these changes can no longer take effect. You
see I cannot do anything here, I need to turn the Machine off then make
these changes. But in any case, you can see that I have assigned it almost three
gigs of RAM, and I have assigned it an extra CPU core. Hopefully it's
gonna run a bit faster, and this has gonna a be a lot smoother experience. You can
do the same if you wish, but it's not required. I'm simply doing this to save
on time. It is not a pre-requirement of what we are about to do. Anyway, just go
ahead and I'm just gonna go ahead and cancel that, minimize this, and have a
look at this desktop. If some of you have used Mac
it's fairly similar to it. On the upper bar you have sound, network
manager, power management, date, username. Or, you can put in your real name
there if you wish. And on the left side over here, you have applications and
places. So let's click on places. Okay, capture it. Click on places. So
it can take you home, documents, downloads, music, pictures, videos, pretty much
similar as in Windows. You can even browse the network if you want, but
doesn't really, we're not gonna do that for now. Anyway, once you go into
applications, for all of you Windows users
out there, this is basically like the Start menu. You just click on it and then
you have pretty much everything that you want here. We
have the browser, which the default one is Firefox of course, and we're gonna
see... don't pint it my good man. Never mind, while it's opening it up
for the first time it's probably gonna want to do some updates, or something of a
kind. Speaking of which, we need to do them as well, but first let me just
introduce you. So you have the Firefox browser here, you have the mail client,
and so on. Basically, this is for music, for photos. You have Libre Office which
is the equivalent of Microsoft Office. You can pretty much do anything in Libre
Office that you can do Microsoft Office as well, so no problems there.
Under files, if you wondering what this is, this is actually a file manager. So
let's just go ahead and click on it to see what comes up, excellent! So this is
our file manager, and I'll just kill this red, gigantic thing in the background,
close them. Most of our time we will be spending at the command line
and we will be mostly dealing with the terminal, but it's good
to have a look at these things, and it's good to actually be at least acquainted
with the graphical user interface, if nothing else. As it is a prerequisite for
using it as a desktop machine, but not a prerequisite using it for a service, or
anything of a kind, which we eventually want to be able to manage, control,
install, and so on and so forth. Anyway, this is your file browser, and you can
pretty much go anywhere from here. If I go down to computer, it's
gonna take me to where some of the system files are.
I cannot access some of them, you see there is an X here
on root. if I double click on it, it says the location could not be displayed, you
do not have the necessary permissions to view the contents of root. This is going
to be a similar case in all, pretty much the same case actually, in all Linux
distributions. You will not be able to access certain
parts of it, or see it, unless you have a root password, or unless you are using a
terminal to actually view it. Which is very nice, primarily because it disables
99% of viruses out there, pretty much, because they cannot do anything on your
system without proper permissions. So, anyway, you have the temporary files, I don't
know, you have the root files, and here under var you have the log files
somewhere. Let's just have a look at them. I'm generally not used to doing this via a
graphical user interface, but let's just have a look at it. So log, excellent! So
you have these log files that you can later on read. Don't worry about it, we
will go through them. We will read them, I will explain to you this in
far, far, far greater detail. For now, I'm just introducing you to the graphical
user interface, nothing else. So just go ahead and close this and go back to
applications, and now you have categories of applications. So you have favorites,
and these really are pretty much the most used applications in pretty much
any Linux distro. Terminal and browser, they are the first two, and
then comes the rest. So, under accessories, I don't know, you have some stupid things
that you would use for your daily affairs. Oh, by the way, the equivalent of
notepad in Linux, I would definitely say that it's gedit. Except it has like a
ton load of more capabilities and options. There we go, definitely, but we're
not, we can use it a little bit later on, but we'll mainly be using text editors
in the terminal. So you can just go ahead and close that. If we go further down
below, okay, so documentation, graphics, nothing there, come on, Internet, okay so
nothing there, excellent, under office. So here you have like Libre office writer
which is word, or Libre office impress, I think that's the one for presentations
in the office package. I'm pretty sure that you know to which I am referring to
a powerpoint. Tip of my tongue but I couldn't
really remember. So LibreOffice impress is basically PowerPoint if I'm not
mistaken. LibreOffice draw, I think it's an equivalent of paint, or something of a
kind, and LibreOffice calc which is basically Excel. If we go down further
below, we got sound, video, OK. So cheese is for your webcam, just so you know. You can
utilize your webcam with cheese, Brasero is for burning CDs, but
you can burn CDs too via the terminal as well without any sort of
problems. If we go down below some Sundry. Okay, so we got SELinux troubleshooter,
print settings, not that important, firewall, excellent! So you have the
graphical user interface for the firewall. And if we go ahead and click on
it, we're gonna be prompted with a root password that's gonna, oops, actually, no,
are you serious? And if select this, no, okay, there
will be a password. That would be hilarious if there wasn't
anything here. If it didn't prompt me for a root password then I
could do pretty much whatever I wanted to the firewall.
I would disavow, I would completely disavow Red Hat, completely and utterly.
Anyway, here you can, but fortunately it does require the password. Here you can
pretty much do anything with the firewall, and firewall in Linux is
open-source. It's capabilities are practically infinite, you can do whatever
you want with it. There is pretty much nothing that you would need that you
cannot do with a Linux firewall. It's amazing. I don't know, I'm sure you can
find something and make meet my own words, but you get the general idea. So
you can decide what services do you want to allow, what ports, you got port
forwarding, ICMP filter this is for pinging, and so on and so forth. But look,
all of this we will do later via the terminal as that is the proper way of
doing this, because on a server you don't have a graphical user interface, and you
have to do with what you have. Primarily because,
graphical user interfaces are resource expensive, and you they waste RAM,
they waste CPU, and you don't want them. Plus, all the power rests in the
terminal. The almighty terminal. Anyway, so go back to applications, Sundry, we were
here, SELinux is your, how shall I put this, is your, let's say antivirus system,
or a way of tightening down security internally. We will deal with that later
on as it will present, as it will play a major role in this course. If you go down
to system tools, you got settings, boxes, and a lot of things here. But, I'm gonna
continue talking about that in the follow-up tutorial as I am running a bit
of short on time here, and there are a few things to which I wish to introduce
you here as well, just so you know that you can access them this way as well. And
more often than not, on a desktop you will need to as well. Until then, I bid
you farewell.