Section 2 explains how to:
Turn the computer on and off.
Perform an IPL.
Modify the start-up program.
Control the system through the console.
Use the system operator message queue.
Check on running jobs.
Control subsystems and maintain your own subsystems.
Work with output queues and control printers.
Perform backups and restore from backups.
Use i5/OSs Operational Assistant to automate some of the operating chores.
In addition, user messages are covered. There is a chapter on i5/OS commands, how to use them, and how to find the command you need to run.