init

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This chapter describes the init  process, which is the first user level process started by the kernel. init  has many important duties, such as starting getty  (so that users can log in), implementing run levels, and taking care of orphaned processes. This chapter explains how init  is configured and how you can make use of the different run levels.

 
• init comes first
• Configuring init: the /etc/inittab file
• Run levels
• Special configuration in /etc/inittab
• Booting in single user mode