Chapter 14. Keeping Time

Table of Contents
14.1. The concept of localtime
14.2. The hardware and software clocks
14.3. Showing and setting time
14.4. When the clock is wrong
14.5. NTP - Network Time Protocol
14.6. Basic NTP configuration
14.7. NTP Toolkit
14.8. Some known NTP servers
14.9. NTP Links

"Time is an illusion. Lunchtime double so." (Douglas Adams.)

This chapter explains how a Linux system keeps time, and what you need to do to avoid causing trouble. Usually, you don't need to do anything about time, but it is good to understand it.