Chapter 13. Keeping Time

Table of Contents
13.1. Time zones
13.2. The hardware and software clocks
13.3. Showing and setting time
13.4. When the clock is wrong

"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.