In this program you'll learn how the Boot Process begins and how to run services at Boot. You will also learn how to start and stop services manually. And lastly, you will learn how to use Upstart, Systemd and how to do Boot repair.

Learning Ubuntu is as easy as clicking on the following links:

1) https://help.Ubuntu.com/Community/Boot-repair

2) http://sourceforge.net/projects/boot-repair/

3) /usr/src/linux/init/main.c

4) https://help.Ubuntu.com/Community/Grub2

5) www.ibm.com/developerworks/linux/1-grub2