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Hello and welcome back to this lesson.

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So now you must have understood about the package managers.

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Let's quickly see what is Yum!

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Yeah.

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So Yum stands for Yellow Dog Update Modified.

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So this is basically a package manager which is used to install packages or applications into RPM based

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Linux distributions.

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Now what is RPM?

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So RPM basically means redhat package managers.

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So RedHat is basically a Linux distribution which is generally used into the industry.

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So Yum also works on different flavors of operating systems and different versions like CentOS, Red

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Hat and Fedora, which are some of the examples that you use here.

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So what is the syntax?

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It is very simple for initiating anything using yum that is install or remove.

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You have to type Yum and options command and the package name.

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For example, if you want to install something, then you have to write yum install and the package

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name.

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So it's the practical time and let's quickly see that.

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How can we use Yum into our computers?

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Okay.

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So here you can see onto your screen, I have Red Hat Enterprise Linux, which has been set it up into

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my virtual machine.

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Now let's see quickly, what is the version?

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So the Red Hat release version is 8.3.

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I am able to see this using the command which is cat etsi, red hat hyphen release.

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So you can also see what is the version.

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This is just to confirm that this is a red hat based operating system and now we are going to install

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and use here.

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So these are operating systems, which is a real red hat enterprise.

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Linux comes pre-installed with them, so we are not going to install it as it is already being installed,

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but you have to see how you can configure it and start using it.

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Now let me just type M and hit enter and you can see that it comes up with a sweet menu like this,

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which means that VM is configured and installed into your computer.

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If you could have got an error that come on not found, that basically means that Red Hat Package Manager

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or your Red Hat enterprise Linux does not have GM installed, but most of the conditions it is already

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pre-installed.

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Perfect.

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I'll just clear the screen now.

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Let me just type M list.

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So when you hit this command, you are able to see that what are the possible packages or apps that

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are available into the repository?

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As you can see over here, so these are all the possible apps or packages that can be installed into

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your computer.

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Now let's quickly install something.

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So for that we are going to use the command yum install and let's try to install a package which is

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the blue gate.

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So the blue gate, if you are not aware, it is basically a package or a command, whatever you like

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to call it, which is used to download something using a terminal.

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So let me just hit enter and when I hit enter you can see we got an error which says to install something

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into the computer you need to use sudo.

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All right, so let's use sudo.

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And again hit enter.

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And then it will ask you to specify your password.

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So I'll just specify the password and you can see it said package w eight and the version number is

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already installed into a computer.

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All the dependencies has been successfully resolved.

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Nothing to do complete now it is already installed into a computer, so nothing was basically done.

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But if the blue gate was not there into a computer, it would have downloaded it and also install or

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resolve all the dependencies that comes with W gate.

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Now this is something awesome because if you try to install a particular package from outside which

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is basically similar to how you install Apks into your mobile phone from other different sources, but

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sometimes you have to compile some.

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Dependencies.

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Okay.

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So you can see over here it is successfully preinstalled and we do not have to do anything over here.

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Now this is something which is very awesome using a package manager because you do not have to install

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all the dependencies one by one individually.

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The package manager itself understands smartly that what are that that what are the dependencies which

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are required for this tool to run and it automatically installed those dependencies.

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Now if you just try to install this tool or the package from outside and if there are some possible

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dependencies, then it will just throw you errors and you have to resolve or configure those particular

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errors and install the dependencies by yourself.

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Now it will become a tedious task.

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Hence package manager's comes handy and it installs all the required dependencies for that particular

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package easily.

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All right, so now let's quickly see one more tool that we are going to install.

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So let's say Kohl So I'm just going to type sudo yum install coal and let's see what happens and perfect.

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It says it's already installed.

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All the dependencies are resolved.

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Nothing to do.

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Okay.

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So now we are going to remove something from our computer.

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So for that we are going to use the same command which is sudo yum.

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But this time remove.

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So let's say we are going to remove a package which is w get.

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So the command is fairly pretty simple which is pseudo yum remove w get when you hit enter you can see

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removing over here and into the red you can see w gate has been successfully removed over here.

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It is asking you that it will take 2.8 and b space and this will basically get freed from your computer.

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Are you sure?

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So I'll just press y and you can see it is basically removing it once the product has been removed.

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Removed, as you can see over here, all the dependencies are also being removed.

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So now this computer does not have w gate installed and when you try to just run it, it will throw

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you a error saying that W is not there and what is the process to get back to it again?

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It's simple sudo yum install w gate and it will basically install it.

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So I hope you guys understood and you got a fair idea about how to use yum to install and remove packages

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from your computer.

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Thank you.