I remember my dad, an old school linux military man told me that writing drivers was the "initial task" of many linux programmers. Thank you for sharing your experience.

Fun fact: Linux kernel v2.6 has ~8 million lines of code, v5 has ~26 million lines of code :)

Thumbs up for LiveOverflow ASMR where he reads Linux Device Drivers (Third Edition).

Hey @LiveOverflow Regarding 14:30; Python is internally calling the C the standard library's stdio buffered functions (fread/fwrite) which does the buffering which internally makes the syscall specifying the file descriptor, which triggers the char module's read/write function.

Hey. I enjoyed the video. I didn't really feel it was 17 minutes long. It went by fast. Just wanted to say this might be a very good, and so far unimplemented type of video format: You pick a free-to-the-public book, like this one, and read/work through it chapter by chapter. Except you might do it in like a live-stream format ? (maybe one livestream per chapter) I know the live part is kinda daunting, but I feel that doing this would either way help you: - You get obviously the benefits from reading/working through the book. - I feel this might attract viewers since in a way, you will pretty much look like you are "noob" while learning. It will show the viewer that learning is a sort of tough process ? And that they shouldn't expect to know it all in one sitting. And in a way, since this actually attracts people, you might feel the freedom of messing up, of not editing, of not having to look too damn professional. Just be yourself, learning. - Get the profit from the views. - I don't know if this one counts but: Sometimes (really uncommon times), knowledgeable viewers might get in the livestream, so if you don't know a certain something, or are working through something they know, they might raise helpful ideas or explanations, thus increasing the dialog, making it more engaging to viewers to stay in the stream. I really wish you could do it with ANY book. Of course copyright :/ (I wonder if it's legal that you could buy the book, and then show it here. Or work through it this way) Maybe you could even do patreon requests every time you want a new book; effectively making us pay for it. Since in the end, you would be providing us with useful info. In the end. You might get a nice catalog of playlists of books you've worked through. Viewers from any point in time [who bought / are interested in a book] can follow along with you in the future. You put a bunch of ads in every live-stream, and PROFIT. Maybe it is nice publicity for the book ? and also for you. So that you can tweet or somehow contact the writers about doing copyright books. Maybe some will allow it? I know for instance there's this open book about reverse engineering, that the guy updates constantly, and he releases totally free. So you might work through it ? learn, and PROFIT. All while making the book more known, increasing the dialogue, etc.

i Just followed the code example and was blown away. Great work. A lot of people say making a series out of that would be amazing and I can only agree!

I actually searched for something like this for quite a while and now i randomly stumble over it just by subscribing your channel! Thank you! That helps me so much with one of my projects!

your passion is great! I'm still a beginner programmer. I've taken one term of python and two terms of C++ in community college, so there is still a lot here that goes over my head, but it was really valuable to find this tutorial and explanation, and I can guarantee Ill probably revisit this video in the future as this is now a jumping off point to asking even better questions to understand what I need.

Thanks for all your help, been interested in reversing for years and have rarely found a more concise and comprehensive resource.

how you went into the library to analyze the makefile, realized that you have that directory on your linux and then just executed it and it works was just amazing :D

Great video! It is truly fascinating that one can compose these file and block drivers on top of each other so that a simple open+write to a certain file can go through a Samba client to send the write call to another server, have it written to an ext4 filesystem which uses a virtual block device which stacks in transparent encryption and mirroring to two different underlying disks, which are actually just block devices, or even might span multiple disks via again virtual block devices...

Thanks for making this video explaining this book. I didn't make it very far! Now i get it more! Please consider going through more of this fascinating series!

This is mindblownig as you said! I never knew how that devices works and acting like a file - thanks for that daily videos, I'm learning so much stuff

Wow, really impressed by the explanation you've provided! I'm taking an embedded software course, and I really needed this!

How Linux Works, 2nd Edition: What Every Superuser Should Know by Brian Ward, also a great book regarding an overview of Linux.

Awesome video, I did the simple hello kernel module a few years ago and was in over my head. I wanted to create a simple way to send commands to an Arduino, ultimately controlling a stepper motor. I thought the best way to do that would be to create a driver and simple "client-side" code to take commands in the terminal, writing to the device "file" to provide a number of steps and direction to the stepper motor. You've re-ignited my interest and I may make another attempt.

My University exams just ended for now. I was wondering what should I learn and bam notification for this video appeared. Thanks for dropping this awesome resource man!

This is exactly what I was looking for as Im learning how to make my own kernel modules. Maybe you could expand on building makefiles and cross compiling things as is frequently done when working with embedded linux systems. Great video!

I have the first edition of this book, and the "Understanding the Linux Kernel". Those books, starting with Linux in 1994 and reading literally hundreds of Howto documents, and doing a Linux from scratch build, taught me a ton. Too bad that pretty much all of what I learned back then has since been superceded by evolution. Getting X up and running in the 90s was also a major learning experience.

That is so awesome, I have read tried to read this book in the past but never got far because the examples did not work anymore. Thank you for this video and providing this resource tons of fun writing my own drivers to be had now :)

My 3rd year computer science project for my university course will require me to write Linux device drivers. This looks like a really good place to start. Thanks so much!

This was paradigm shifting for me :), been trying to grok device programming for a long time. Though admittedly never focused heavily on the subject, just pieces here and there. Thanks for the video

At the beginning, is that Ben Eater's 8-bit breadboard computer design?

When I saw the cover of the book I thought it looked familiar.. and guess what I actually still have the printed version and had used it over 15 year ago! Happily surprised to see how younger generations and youtubers are enjoying hacking into the kernel avoiding to just use latest frameworks! Thanks for the video (and to the g recommendation system that made me bump into it!) :)

I'm really glad to have found this channel. Extremely interesting, very straight-foward and substantive :)

This is one of the most awesome videos to get started with kernel programming! Thanks for this one.

I now want a 2hr version of this 😂 this was amazing

Omg I’m so pumped up to go back to this book.. you helped me significantly on this!!

Knew about linux drivers and fs devs a long before this video but to see an actual example... Exceptional! Thank You!

Your enthusiasm is contagious

This is easy enough for me to understand, but still amazing enough to blow my mind.

I have a certain understanding of drivers, and I have worked in semiconductor manufacturers before. This video is a driver getting started video. The reason I like this video is that the English pronunciation of the video owner is clearer and I can understand it better, which helps me practice English well.

I love watching tutorial videos with more applicable examples like that. Better than useless entertainment videos.

Hell of a nice coincidence, I had just started reading the first chapter of this book. Thanks for the vid, man

Wow, it's so interesting. I always love getting known about how all the things, which were always magic to me, work and how they're connected with each other. Then, everything (some of the magic) clears out to me. I really like that feeling. Thank you.

Nice introduction! I enjoy videos about what happens under the hood on linux, specially when they are done in such smooth way

Mate, are you reading my search history or something? I've been searching for a good explanation of Linux kernel drivers for a couple of days now xD

Thanks for making learning complex stuff enjoyable! Keep it up!

Dude, your enthusiasm is contagious. Nice vid, keep it up!

Really enjoyed the video... It would be great to have a series of videos for all three types of LDD.

Video starts. Me: I'm not sure if he can keep up the high quality of his videos with daily uploads. Also Me 3 Minutes later: Oh damn thats so interesting and well put together. Keep up the good work! I never regret watching a video of yours!

I just spent the last few weeks in WDM hell, but I'd never seen Linux driver code before. It's so amazing how much simpler Linux driver code is than the equivalent in Windows!

Your passion is a font of inspiration for me, hope you can do more content about kernel development

Fantastic video, really enjoy your stuff. The joy in your eyes is great to see.

i just finished studying this material this semester, and this was spot on, great video!

A bit different than what I expected based on the video''s title... This really doesn't describe or expand on kernel drivers, But as described in the opening minutes the driver interface provides a way to access, manipulate and even write code that can operate against kernel functions. In other words, the kernel driver isn't the real topic of this video but is a sideshow means to the real topic...accessing the kernel. So, although I felt I was misled, This video is still very interesting, educational, clear and well made. Kudos, I think many people can benefit from this.

If you like Python programming and file interfaces, you might love Python Fuse ( _pip install fuse-python_ ) : write a virtual file interface in Python, straighter to the goal without compiling kernel modules. Thanks a lot for this tutorial. Love it!

Really appreciate the book link, been looking for something like this

Thanks for the very simple explanation of such a complex topic!

Holy crap… I tried to read this book years ago but was over my head…you just cleared some shit up for me! Bless you sir

i wanted to hit the like at least 4 times while watching. would love more of this. thanks.

Well, i'm a bit late to the party but this video gave me exactly the missing link I needed to connect some stuff in may thoughts! :) Thank you! Might as well try writing something now.

Such a great and extraordinarily helpful video, for less than 20 mins. Thanks :)

Wow, I am just now doing a course about writing device drivers with a project at my university, that may be useful, thanks

I wrote the first Linux kernel device driver for the Linux version 2.4.5, SH -3 (Renesas 7709 and 7727) device drivers. I remember compiling and building many times. In Kernel space, there was no convenient crt0 that called the main function, so it was pretty hard. Before that, I had to fix the device drivers for FreeBSD 2.2, but they were completely different, so I had a hard time. The device driver is basically OK if read, write, ioctrl are implemented. As for interrupts, the handler is not too hard to figure out how the interrupt is occurring, but if you didn't follow kmalloc, kfree in that order, it immediately went out of control.

your current video output is insane while maintaining and improving quality. big up bro

this is soo cool, what an awesome kickstarter for writing LDD's

I remember reading this book a few years back. It really is great.

why am I just seeing this now?! Amazing video and your enthusiasm :) love it

I really enjoy his extreme enthusiasm

Amazing ! Really enlightening, like you said. Thank you so much!

Thanks for sharing! I'm learning a lot when watching your videos.

Your passion is contagious!

Thank you so much for the channel, I keep learning a lot!

Awesome! Best rundown on kmods ever.

Honestly this is probably one of the most interesting videos I watched from you so far. I mean the hacking videos are great too, but I never felt so enlightened 😱

Nice. I've been meaning to learn about device drivers. This video and the free book is just what I need to get started.

Beautiful overview. Thanks!

I do like your enthusiasm when you saw your code running in the kernel! LOL!

Appreciate your hard work, and love your passion 👍

Thats gold! Thank you for sharing that resources

Wonderful video, thank you. Editing was done superbly too. I hope you will have a proper office chair one day. That one looks painful to sit on.

You're a great teacher, keep it up!

it's an guide for one want to dive into the kernel. before this i didn't know device driver is a good start point. anyway thank you for introduce this book.

Dude i was just thinking i should learn more about this and this video popped up. Thnx m8

This actually makes a lot of sense tbh, thx for the video ^~^

What a great video, i love your enthusiasm. Thanks!

Man, you give me so much inspiration!

Beautiful explanation. Thanks !!

I enjoyed this video so much. Thank you!

What a video 👏🏻 Awesome Job brother

This is excellent, and it really makes me want to write a driver - like way back after I purchased the 2nd edition of that »Linux Kernel Drivers« tome (for €39.60, ouch). Grüße aus Nürnberg (where IBM also has a building, near the Saturnweg)!

Nice video ! I´d love to see doing you a whole driver..

Many thanks and high appreciated for your enthusiasm, helping and flowing the knowledge river.please continue this great tech sharings

Hey man I really enjoyed this video. It need really make me understand how LINUX truly functions. Thank you so much for making this video. now I see Linux very differently.

Thanks for this video, I really liked it! There's not many good videos on UKposts about the Linux kernel. I did have a question though! I purchased all of the Linux O'Reilley books though Amazon and the Unix/Linux humble book bundle but I'm not sure which books to read in what order. Is there a specific one that would be better suited to read first before others? Thanks!

Interesting stuff, thank you! ❤

Great stuff. Very clear, thank you.

Thanks so much for this video. It's difficult to find resources on getting started with linux driver development.. Have to write a linux driver for a school project!

>python ERROR: Gets Permission denied >SUDO python

This cool content when u grap a book and look into it like that or more to do a series whene u read book and explain it

I really like your 'File' gesture!

awesome vid! very clearly and simple

Awesome, now Linux drivers looks fun! Thanks for posting!

Sheeeesh, only been a few days since I've finished and submitted my first academic essay, and it did actually refer to "Linux Device Drivers" (Rubini & Corbet) 😂😂

Echt cooles Video! Studiere auch gerade Informationstechnik ander DHBW, allerdings mit Keysight. Ich wünschte es gäbe mehr Leute, die bei "Our code was executed" so begeistert sind... ;)

Love it, thanks for sharing.

Thanks a lot, that was really informative

Thanks for doing this video!

i love this, can you please consider making a tutorial on stuff related to these? Kernels, Buffer and all the behind the scenes of an OS. Thank you