Sams Teach Yourself Unix System Administration in 24 Hours

Hour 13 Changing System State

Compared to a personal computer operating system, the multiuser, multiprocessing capabilities of Unix can seem a bit alien in some regards. Most notably, have you ever stopped to consider what happens when you either boot up or shut down your Unix system?

In this hour, we’ll dig into the system configuration and learn exactly what processes are started and stopped (and how they’re started and stopped) when you switch states, either booting, halting, rebooting, or switching between single-user and multiuser modes.

In this hour you’ll learn about

• The init process and its configuration file

• Enabling specific services ...