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Hello the beautiful people.

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And welcome to this video where we're going to be talking about how you can download the source code

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for packages.

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So at the minute, all we've been able to do is download and install pre compiled binary packages,

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but we're interested in how we might be able to go about getting source code so that we can exercise

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the freedoms that free software gives us.

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It's actually a very easy process.

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In order to do so, all you've got to do is as an administrator.

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So with the sudo command open up in nano, the slash etsy slash apt slash sources list file.

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Now in here, when you enter your password, you're going to be opening up a configuration file that

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your package manager uses to determine which repositories in which package files it downloads, in other

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words, which sources it downloads.

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Okay.

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So what we're going to do in here is you'll notice that there are lines that start with Deb Source or

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Deb Dash CRC, and those lines have a hash in front of them.

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What I want you to do is I want you to just delete all those hashes on those appropriate lines.

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And what this will do is it will activate the ability for your package manager to be able to download

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source code, which is deactivated by default just to save efficiency, basically.

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So there we are.

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I've gone ahead and done that.

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I'm going to press control on oh, to save the file.

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I press x control at X to exit.

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So now what we've done is we've said to the package manager, Hey, why don't you go ahead and download

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the, the package lists that contains source code, okay?

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But to be able to get those things in the cache, we've got to update our cache.

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So all we've got to do now is do sudo apt get update and it's going to go ahead and start downloading

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all the source packages here.

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So you can see that this is is installing all the source packages into our cache.

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This is a very useful thing because now we can we're almost ready to be able to download source code.

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Okay.

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So before we can download source code, we need to install one more package which is so if we do sudo

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app get install, it's going to be the DX package, dash dev package.

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So dpkg dash dev, you install that you type.

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Yes.

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When it asks you.

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And there we are.

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We've managed to now it's going to go ahead and download and unpack that package and now we can go ahead

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and install source code.

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It's literally that simple.

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So we've been messing around with the X's package.

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Let me head over to the desktop and we've been messing around with the X's package.

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So how can we get the source code for the for the XYZ package or the XYZ program?

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Well, it's contained in the X11 apps package.

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So if we do sudo apt get and we used to do install, right.

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We do install X11 apps.

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Right.

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And that's how you'd get the pre compiled binary version.

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But if you want to get the source code instead of instead of install, just put source and you'll see

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that it goes ahead and downloads these packages that contain source code.

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Now we can actually go ahead and enter these using CD.

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So if we seed into the package and take a look around, we can see that there's a folder here for X

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ize.

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And if we take a look in X ISE as a CD X EIS, we'll be able to see in here that we've got the source

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code for the XYZ program.

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So you can see we've got a config file that we can use to configure our new C compiler.

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But what we're interested in right now is this XYZ C, which is actually the source code for the XYZ

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program.

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And we can take a look in here and read the source code for the XYZ program.

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It's literally that simple.

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Okay.

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All we had to do was go ahead and change our slash slash app, slash sources, list, file, and in

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here, just uncomment all the lines that had that had a hash in front of them for DB source.

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And those are the repositories that allow you to actually download source code.

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So if you uncomment all of those and that update your cache using pseudo app, get update, then once

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you've downloaded all the new lists, all you've got to do is install the is, install the dpkg dev

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package and then you're good to go from now on if you ever want to download any source code.

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What you got to do is sudo apt get source and then a package name and that is all you need to know in

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order to be able to download and play around with source code.

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But one thing that you should bear in mind is that if you go into these source code packages and you

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actually compile them, you'll lose the ability to install them.

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That way you'll lose the ability to keep them updated with your package manager.

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So therefore, if you have the choice to install a package through the package manager or install it

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from source, make sure that you install it through the package manager and through the repositories

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rather than compiling it yourself.

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But this is a really cool way to be able to go ahead and take a look at how code works and maybe incorporate

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it in your projects.