Cornell L. Linux Kernel Programming Essentials. A Practical Guide...2025

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Cornell L. Linux Kernel Programming Essentials. A Practical Guide...2025

Textbook in PDF format Master the Linux kernel from the ground up and transform from a curious developer into a confident kernel programmer. Linux Kernel Programming Essentials is your complete practical guide to understanding, building, and modifying the most widely used operating system kernel in the world. This comprehensive guide takes you on a structured journey through kernel development, starting with the fundamentals and progressing to advanced topics. You will learn to obtain and navigate the kernel source code, configure and build custom kernels, and write your first loadable kernel modules. Through hands-on examples and clear explanations, you will explore the core subsystems that power Linux, including process management, memory management, the virtual filesystem, and concurrency control. Written specifically for C programmers ready to move beyond application development, this book strips away complexity and presents kernel programming in accessible, plain language. Every chapter builds on practical, actionable steps with real-world code examples that you can run in a safe virtual machine environment. You will gain the confidence to read kernel source code, understand system behavior at the deepest level, and write custom drivers and modules for your own projects. Whether you are a systems administrator seeking deeper understanding, a computer science student wanting to see theory in practice, an embedded developer needing driver expertise, or an application programmer ready to master your platform, this book provides the foundation you need. By the final chapter, you will have built a complete character device driver from scratch and learned how to contribute your own patches to the Linux kernel community. The book covers kernel version 6.5 and includes detailed appendices with configuration references, essential commands, recommended resources, and sample build scripts. All development work is designed to be performed safely in isolated virtual machines, protecting your system while you learn. Stop wondering how the kernel works. Start building it yourself. Linux Kernel Programming Essentials gives you the knowledge, tools, and confidence to become a kernel developer. Prerequisites: This book is for beginners to kernel development, but it is not for beginners to programming. The kernel is a demanding environment, and to be successful, you need to arrive with a solid set of foundational skills. Being honest about these prerequisites will ensure you have a smooth and rewarding learning experience. Required Skills: - Proficiency in the C Programming Language: This is the most important prerequisite and is non-negotiable. The Linux kernel is written almost entirely in C. You are not expected to be a C wizard, but you must be comfortable and fluent with all the core concepts of the language. Specifically, you should have a solid understanding of pointers, struct and union types, bitwise operations, the C preprocessor, and manual memory management concepts, though the functions will be different in the kernel. This book will not teach you the C language. If you are not yet comfortable with these topics, you will benefit greatly from strengthening your C skills before proceeding. - Comfort with the Linux Command Line: All our work will be done in a terminal. You should be fluent in using a standard shell like bash. You need to be able to navigate the filesystem (cd, ls, pwd), manipulate files (cp, mv, rm), and use standard text-processing tools (grep, find, less). You will also need to be proficient with a command-line text editor, such as Vim, Emacs, or Nano