CompTIA Linux+ Certification All-in-One Exam Guide, Second Edition (Exam XK0-005), 2nd Edition

CHAPTER 11

Managing the Linux Boot Process

In this chapter, you will learn about

•   The BIOS power-on self-test phase

•   The GRUB2 bootloader phase

•   The kernel initialization phase

•   The System V initialization phase

•   The systemd initialization phase

You can’t be a leader if you turn around and there’s no one there.

—April Walker, Microsoft

When you power on your Linux system, it goes through four major steps to start processes and display the login screen:

•   The BIOS power-on self-test (POST) phase

•   The GRUB2 bootloader phase

•   The kernel initialization phase

•   The systemd initialization phase (formerly System V initialization)

Figure 11-1 illustrates the boot process after powering on the Linux system. Boot-specific messages ...