What you'll learn:
Learn how Linux kernel works with a high-level understanding of various kernel subsystems
Setup your own development environment for exploring Linux kernel development on a VirtualBox VM
Learn about important concepts related to modern operating systems
Learn how to custom compile and boot a binary image from official Linux kernel sources
Learn how to create a Linux bootable image with custom built Linux kernel and busybox as userspace
Learn how to create custom initramfs image with busybox as user-land
Learn how to navigate the kernel sources, learn new features and APIs
Learn how to create Linux kernel modules and understand development process of loadable kernel modules
Learn how to interface procfs and debugfs via Loadable Kernel Modules
Learn the tips, techniques and best practices to become a proficient Linux kernel developer
Learn how to create patches that can be submitted to the official Linux kernel community
Requirements:
Programming skills using the C programming language
Knowledge on Linux command-line interface - using the bash shell, basic shell scripting and basic linux commands for managing files and processes
Basic understanding of the computer hardware architecture
A laptop / desktop based on x86 architecture (Intel / AMD) with enough memory (atleast 16 GB) and storage (atleast 128 GB) with support for running VirtualBox VMs
A working OS setup - either Windows 10+, MacOS (x86) or any desktop Linux distribution with latest version of VirtualBox installed.
Description:
This course provides a comprehensive introduction to Linux kernel design and architecture, aimed at equipping you with both theoretical knowledge and practical skills. I will begin by covering essential operating system concepts and terminologies, ensuring that you have a strong foundation. From there, you'll dive into the intricate workings of the Linux kernel, learning how to build it from source code and create a fully functional, custom bootable Linux system. This includes setting up a BusyBox user-space environment to complete the operating system, giving you a hands-on understanding of the system's internals.In addition to kernel building, this course will teach you how to develop your own Linux kernel modules, with a deep dive into loadable kernel modules (LKMs). You'll explore how to extend the kernel's functionality dynamically, enabling you to create, load, and debug modules efficiently. The course also delves into key features like kthreads, interfacing with the procfs (/proc) filesystem, allowing you to expose any module / kernel related statisitics to user-space, and also interfacing with debugfs (/sys/kernel/debug), allowing you to expose variables from within kernel-space to user-space for diagnostics and debugging.Furthermore, you'll gain experience in contributing to the Linux kernel by learning how to create patches and apply them following the official Linux kernel development workflow. Upon completing this course, you will be proficient in exploring, managing, and modifying the Linux kernel source code, ready to embark on a path toward becoming a skilled Linux kernel developer.
Who this course is for:
Beginner level Linux enthusiasts interested on exploring into Linux kernel internals and development
Systems Engineers working on other operating systems and interested to explore on Linux kernel features
Linux kernel developers / Device driver developers interested in refreshing their knowledge on fundamental concepts of Linux kernel

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