Overview
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Master the fundamentals of working with the Linux kernel. Learn how to read and write proc files, work with loadable kernel modules and source code, and configure the kernel.
Syllabus
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Introduction
- Linux kernel overview
- Using the exercise files
- Prerequisites and takeaways
- What is the Linux kernel?
- Where's the kernel?
- Discover and control hardware
- Understand system call mechanics
- Read messages from the kernel
- Use the /proc and /sys filesystems
- Challenge: hw, syscalls, proc and sysfs
- Challenge: Solution
- Understanding the bootloader GRUB
- Configuring GRUB
- Kernel command line parameters
- Configuring and using systemd services
- Debugging initramfs images
- Challenge: GRUB, targets, the initramfs
- Challenge: Solution
- Loadable kernel modules (LKMs)
- Finding the LKMs
- Using LKM commands
- Identifying how LKMs work
- Challenge: Working the LKMs
- Challenge: Solution
- Get the kernel source
- Explore the kernel makefile
- Examine and build kernel documentation
- Search the kernel source
- Examine kernel driver source
- Additional selected subdirectories
- Challenge: Linux kernel source code
- Challenge: Solution
- Using make menuconfig
- Using make xconfig
- Explore kernel config files
- Build and install modules and kernel
- Challenge: Installing a kernel and LKMs
- Challenge: Solution
- Next steps
