One, two, three, can you hear me? Yes. It's been a long time since I tried to broadcast, so, one, two, one, two. How are you doing now? Yes. Is it not too loud? Yes, it's not too loud. Is it okay? Actually, this is not the broadcasting equipment I used at home, so it's not too loud. Okay, got it. Yes, I was talking alone. Yes, then I'll talk again. Yes, finally, I'm back. Yes, I took a break from the lecture broadcast for over a year, but now I've decided to start broadcasting lectures periodically again, starting from today. But today's broadcast is not a lecture, it's an orientation. So, from next week, the lectures will start, and every Wednesday, you can see me at 10 p.m. So, I'll briefly explain what kind of lecture it is. First of all, my goal is to shoot the easiest Linux kernel lecture in Korea.

I've been studying hard to prepare for the kernel lecture. It's definitely challenging, but let's focus and take it easy. That's my goal. So, what's the lecture about? First, it's a lecture on understanding the kernel by analyzing the Linux kernel source code. We will learn how to compile the kernel, how to debug it, and naturally acquire hardware knowledge and knowledge about operating systems while analyzing the kernel. By the way, the book I've been diligently reading, as many of you may know, is written by Kim Donghyun. It's about learning the structure and principles of the Linux kernel through debugging. So, before I start this lecture.

I have already asked the author if I can give lectures with this book. I have obtained permission. Also, I have decided to upload these lectures on Inflearn for a fee later. So, I am proceeding with permission. If the book is not available, can the lecture not be taken? No, that's not the case. As I looked through the book, it is clear that Kim Donghyun has written it in an easy-to-understand manner, but for beginners, for example, there is no separate explanation for things like apt get run. He may assume people naturally know why such things are done and write the book that way. However, based on my experience, many people do not know about these things. They just follow along without understanding what it is. So, I am trying to create it so that they can grasp the rough concept and move forward.

I'm going to make it happen. Yes, so, we're going to proceed based on the book by author Kim Donghyun. Now, what are the differences? What are the distinctive points? For example, among the existing lectures, we aim to make it the easiest. That's the goal, to make it really easy, although it may still be difficult, we try to make it as easy to follow as possible. As I mentioned earlier, for example, when you try to do kernel lectures, it takes a few hours just to build the kernel. If you follow a certain order, many meanings of the commands we type are often omitted. However, I try to incorporate why we do each of those things into the lectures. Why do we need to teach that specifically? There is a reason. Why is there a reason? Because when you look at it now, when Kim Donghyun wrote it, the kernel is probably the latest.

Version 4.19 would do that, right? Yes, but at this point, the kernel version has been changed to 6.1, and as you continue, environment settings and such things change every time. For example, if you simply follow along without understanding, you won't be able to do it later, and you'll gather these processes. So, even if I try to search, once you understand why you're doing this, like, Oh, I'm doing this because of this, or I'm entering this command, then in the future, when you configure some environment or something like that, it will be much easier. Yes, so for that purpose, I will try my best to explain why I am taking these actions. Anyway, I try to make it easier. Yes, I think that's right. However, there are some conditions for learning. To take this course, you must definitely do this. You must.

If you can't do it, you can't take this lecture anymore. Why? Because the source of Erenus is now divided into two big things. One is a language, and the other is now assembly language. But when I actually give a lecture later, I will explain assembly language in more detail. This is an architecture, so to speak, in simpler terms, it's like the CPU. So, depending on the machine language, the assembly changes. So even if you know one assembly, if the core CPU changes, you have to look at it anew. So, assembly language, I will interpret the assembly language in the Raspberry Pi version I selected and teach the lecture. However, in reality, that is impossible. So, at least the original grammar.

If you read through this, you should study enough to at least be able to follow this lecture. I would like to say that. And next, I recommend at least a month of Lisp or, if not, at least a week. And for those who have tried compiling something in Lisp, I recommend listening. So, what I mean by this is, if you start learning Linus Corner for some reason, you might feel like you could become an expert. Even if I teach you easily, if you start vaguely without much background knowledge, it's not easy to digest. So, you should spend at least a month on Lisp, try some commands, use various basic things, try coding, compile it at least once. You should do that much at least to be able to follow the lecture. And why should you learn? There are many reasons, really many.

I have a reason, but to put it simply, the Ahn Kernel follows the Linux Kernel. I know how to look at and fix certain Linux kernel sources. Then, developers will acknowledge it among themselves, saying, Oh, you have some skills. So, I just level up in one word. It's challenging to the same extent as the difficulty. You have to be tough, but once you do it, you gain confidence. Yes, according to Kim Dong-hyun, your physical condition improves. For example, like Iron Man or athlete Yoon Sung-bin, no matter what sport they do, they are good from the beginning. It's a similar meaning. What I'm saying is, if you can analyze a corner to some extent, if you say you know how to look at it, you just gain confidence. So, I do something related to Linux.

So, what happens is, when your basic physical fitness improves a lot, your physical condition gets better. So, it's good to learn in advance. However, even so, if you haven't prepared at all and suddenly say you want to do it from the next time, you can't summon. Yes, that's why I will now emphasize that you should study at least to that extent and come. So, when will we do it? We will start every Wednesday at 10 p.m. Typically, the lecture will last at least two hours. Yes, and as for my teaching style, I don't stick to the time strictly. In a way, it could be said that my qualities as a teacher are lacking, but that's also a possibility. However, until I deliver all the content I want to convey, the lecture of that day will not end. So, we will continue until the early hours. That's how it will go for about two to three hours.

And this time, I'm planning to proceed by seasons, unlike before. Because this kernel is very thick, the book is divided into two volumes. Also, there is a lot of content not in the book. That's why I have no choice but to give lectures. For example, someone asked me what to do about going to work the next day. I will tell you about that later. Anyway, that's why I'm going for the long term. In my opinion, it would take at least about a year to finish all the lectures. So, I'm trying to take it slowly. After each season, which lasts about three to four months, it will end. Then, I will keep it open for free for about two weeks. After that period ends, I will close it and plan to switch to a paid service. So, this is like webtoons, like Naver Webtoon. Actually, when I make my own.

It's free, so you can watch it for free. However, once it ends, when the bell rings, it will transition to a paid service. Where will it go paid? Yes, I'm thinking of going to Inflearn. Then, there will be editing, subtitles will be added, and for those who watch it as paid viewers, those advantages, cutting out unnecessary parts like my rambling, adding more supplementary materials, etc., will be done. So, next Wednesday from 10 p.m., you can watch it, and how about going to work? Anyway, I'll leave the video, so if you feel too tired and think, I'll just sleep, you can just take it easy and watch it the next day. That should work, and regarding Season 2, it's not set in stone that it will only be open for two weeks. So, if there are opinions like, Keep it open for about a month, please let me know.

I will do whatever it takes to make it possible. For example, there are materials. When I gave an embedded lecture before, I prepared all the materials so that you could just pay and buy them. But this time, I couldn't do that. Why couldn't I do that? Because I used the Raspberry Pi 4 Model B. I contacted Raspberry Pi, but they said that I could only register on the market for a specific period. So, it wasn't possible. Then, I thought there's no other way, so each of you will have to purchase the materials. In the past, it was very difficult to buy a Raspberry Pi because of Corona. It was not easy to get chips due to Corona, but nowadays, it's easier to get them. Therefore, unfortunately, you will have to purchase the materials that I mentioned.

You should do that, and if you buy this, it was around 70 to 80 thousand won. For example, you can use Raspberry Pi 5 or something like that, but it's better to just match it as much as possible. Because I didn't even know what specifications of Raspberry Pi 5 came out. Anyway, if these specifications change, if the core changes or something else changes more specifically, the explanation should change accordingly. So, if something small changes, you might have to find it yourself. So, if I'm a bit proficient, if I'm a bit proficient, then I can just switch to something else. But if it seems a bit difficult for me, then it's better to do it exactly the same. For example, the Raspberry Pi 4 Model B I used had a 2GB memory.

So, it seems like you can follow along. Also, I have a Raspberry Pi 4, not sure about the model, but from what I see, there shouldn't be any issues. If the core is different, following along might be a bit difficult. If the core changes, so right now, I will proceed based on 16 bits. 16 bits. And the book written by Kim Donghyun is based on 32 bits. So, I tried to follow that directly, but oh, this book is about 2 years old, so it might not be easy to find the exact things smoothly. If it's not easy for me to find, it will be even harder for others, right? So, I decided to proceed with something easier to find and rather study more to keep up with the latest. That's how I proceeded. Yes, and just so you know, Kim Donghyun is currently uploading lectures recently, updated for a practical environment where you can practice. So, I tried to make it as easy as possible.

I will kindly give a lecture, but still, Mr. Kim Dong-hyun, you are more of an author now, and knowledge-wise, you are ahead of me. So, if you want to talk about something more advanced, it's like referring to that lecture. Surely, it will be helpful. So, if you watch my lecture, you can fill in the gaps and it would be good to refer to Mr. Kim Dong-hyun's lecture a lot. Anyway, the most important thing to prepare is to get a Raspberry Pi 4 Model B. You need to purchase that to be able to follow the lecture. It's not urgent in the first lecture; it will be needed in the second lecture. So, I think you should take about two weeks to prepare. Here, for the materials, you also need a micro SD card of 32GB or more because the kernel will be installed here.

I recommend about 32GB and then you need a Type-C adapter. This is for plugging in the power to Raspberry Pi 4. Why 3A is important here is, voltage, all voltage is 5. The type doesn't matter, but I recommend purchasing over 3A. If the current is insufficient, the Raspberry Pi may display a rainbow screen and turn off. So, using a Type-C adapter of over 3A will work. If you look at the adapters rolling around at home, around 2A might still work, but the recommendation is 3A. Next is the case. What I mean by the case is, there is a case for Raspberry Pi. It's good to put it on. Embedded professionals would know this. When it's winter or something, we touch various boards, and if we touch the board, it sparks.

Sparks are flying, and at that moment, the voltage suddenly rises to several thousand volts. So, the board just pops up and flies away. Yes, so that's why you should wear some kind of protective gear and always do something like touching a raspberry pi. For example, touching another piece of metal once, yes, letting the static electricity flow, and always grounding yourself, yes, and you have to make the board. Especially in winter, why is that? Because I've used a lot of Raspberry Pis, they are fragile, yes, fragile. So, if you have a board other than Raspberry Pi, you should look into it. Yes, it seems like it has become a big deal, so I just chose this one. This is not for home use, it's not for industrial use, industrial ones are more expensive, yes. So, because home ones are fragile, handle them carefully. I talked about all this during the embedded lecture, why.

That's why in the embedded lecture, in lectures 1, 2, and 3 that I recorded, I explained everything, so if you watch that, you'll understand. Also, I explained what Raspberry Pi is in that lecture, so if you're interested, you should watch it. Next, about the micro HDMI to HDMI cable, it's not just an HDMI cable. One side is micro HDMI. Actually, this may not be necessary. When you set it up initially, there is wireless sharing, so if you set it up correctly, you can immediately SSH and control it through communication. However, in case of an emergency, if something goes wrong even though you think you did everything right, in that case, you may need to directly connect the Raspberry Pi to a monitor to see what's happening. So, it would be good to have this. Also, you need a router. If you have a router, it will be more convenient for you to develop.

No, it must be there. Because the Raspberry Pi needs to communicate to download the OS and source code, so you need a router. Otherwise, you can directly plug in a LAN cable from KT, but it's inconvenient, so you need a router. It's more convenient if it supports wireless. So, it would be good to have a wireless router. Not a RAM port, this is a LAN cable. You need a LAN cable. Let me fix this. I will fix it soon. You need a LAN cable. Also, you need a monitor. Oh, right, why do you need a LAN cable? Because in emergency situations, wireless may not work. Yes, so at that time, you need to use a LAN cable. I wrote this down. And then, in emergency situations, for example, when you plug in the Raspberry Pi, you need to see why it's not working.

Because it's necessary, and then you need to plug in a USB keyboard to the Raspberry Pi for input, so it's necessary. Next, you need a separate development laptop or computer to develop smoothly. So, if you prepare for this, you can follow the practice. Until when should you prepare? For example, you should prepare before the start of the second session. And in the first session, there will be quite a bit of theoretical classes. Now, let me tell you. Don't miss it, prepare diligently, and continue to work hard in the future. I will do my best to create a good lecture, so I would be grateful if you could participate a lot. Well, if you have any questions, please ask. I will wait for 10 to 15 seconds, and if there are none, I will finish for today. Alright then, let's go.

Anyway, hold on for a moment. I should write it like this. Oh, it should be a LAN cable. So, I'll set up this LAN cable like this and leave the screen because I will edit later. Yes, I will upload it like this. Alright, and I wrote that I might need a card reader, as I have a microSD card. In case I need a card reader for USB conversion, I wrote that it might be necessary. Yes, then it's good. Regarding the question, let's make it fun for next Wednesday at 10 p.m. Okay. Also, just for your information, I drew this. Yes, I think it might be subject to copyright, so the symbol of lease is a penguin. So, this character I drew is mine. Therefore, I have the copyright. Well then, I will wrap up here. That's all for today's YouTube transition. Thank you. Goodbye.

[한국에서 제일 쉬운 리눅스 커널 강의 ] 오리엔테이션

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