Linux Administration Bootcamp: Go from Beginner to Advanced - The Linux Boot Process

This video tutorial covers the Linux boot process, starting with the BIOS, which performs hardware checks and loads the boot loader. It explains the roles of GRUB and Lilo boot loaders in starting the operating system. The tutorial also discusses the initial RAM disk (initrd) and the Linux kernel, stored in the boot directory. It introduces run levels and systemd targets, explaining how to change them using systemctl. Finally, it provides instructions on using shutdown, reboot, and poweroff commands.

What is the primary purpose of the BIOS during the boot process?

• To provide a graphical user interface

• To load the operating system directly

• To perform basic hardware checks and load a boot loader

• To manage user accounts and permissions

Which boot loader is commonly used in modern Linux systems?

• Syslinux

• GRUB

• PXE

• Lilo

What is the role of the initial RAM disk (initrd) in the boot process?

• To store user data temporarily

• To manage network connections

• To provide a backup of the operating system

• To load necessary modules and mount the root file system

How can you view messages from the Linux kernel during boot?

• Opening the /home directory

• Using the 'ls' command

• Checking the /etc directory

• Using the 'dmesg' command

What is the equivalent of run levels in systemd?

• Phases

• Modes

• States

• Targets

Which command is used to change the default target in systemd?

• init set-default

• systemd set-default

• telinit set-default

• systemctl set-default

What command can be used to power off a system using systemd?

• shutdown -h now

• systemctl isolate poweroff.target

• reboot

• telinit 0