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Linux Essentials for Cybersecurity, First Edition by William Rothwell, Denise Kinsey

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Chapter 28 System Booting

System booting is a fairly large topic that incorporates the operations that take place during the boot process. In this chapter, you learn about the different stages of system booting, including the boot loader phase, the kernel loading phase, and the “init” phase.

After reading this chapter and completing the exercises, you will be able to do the following:

Describe the four stages of the boot process.

Configure Legacy GRUB and GRUB 2.

Modify key components of the kernel.

Load and unload kernel modules.

Modify services that are enabled at boot.

Phases of the Boot Process

The boot process of a Linux operating system has four primary phases:

•     BIOS/UEFI phase

•     Boot loader phase

•     Kernel phase

•     Post-kernel ...

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