<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <HTML> <HEAD> <META NAME="GENERATOR" CONTENT="SGML-Tools 1.0.9"> <TITLE>The Clock Mini-HOWTO</TITLE> <LINK HREF="Clock-1.html" REL=next> </HEAD> <BODY> <A HREF="Clock-1.html">Next</A> Previous Contents <HR> <H1>The Clock Mini-HOWTO</H1> <H2>Ron Bean, <CODE> <A HREF="mailto:rbean@execpc.com">rbean@execpc.com</A></CODE></H2>v2.1, November 2000 <P><HR> <EM>How to set and keep your computer's clock on time.</EM> <HR> <P> <H2><A NAME="toc1">1.</A> <A HREF="Clock-1.html">Introduction</A></H2> <UL> <LI><A HREF="Clock-1.html#ss1.1">1.1 Does Anybody Really Know What Time It Is?</A> <LI><A HREF="Clock-1.html#ss1.2">1.2 Where to Find Stuff: "The Usual Places"</A> <LI><A HREF="Clock-1.html#ss1.3">1.3 Acknowledgements</A> </UL> <P> <H2><A NAME="toc2">2.</A> <A HREF="Clock-2.html">How Linux Keeps Track of Time</A></H2> <UL> <LI><A HREF="Clock-2.html#ss2.1">2.1 Basic Strategies</A> <LI><A HREF="Clock-2.html#ss2.2">2.2 Potential Conflicts</A> <LI><A HREF="Clock-2.html#ss2.3">2.3 Should the RTC use Local Time or UTC, and What About DST?</A> <LI><A HREF="Clock-2.html#ss2.4">2.4 How Linux keeps Track of Time Zones</A> <LI><A HREF="Clock-2.html#ss2.5">2.5 The Bottom Line</A> </UL> <P> <H2><A NAME="toc3">3.</A> <A HREF="Clock-3.html">Software</A></H2> <UL> <LI><A HREF="Clock-3.html#ss3.1">3.1 Clock(8) and Hwclock(8)</A> <LI><A HREF="Clock-3.html#ss3.2">3.2 Adjtimex(8)</A> <LI><A HREF="Clock-3.html#ss3.3">3.3 Xntpd and ntpd: the Network Time Protocol</A> <LI><A HREF="Clock-3.html#ss3.4">3.4 Chrony</A> <LI><A HREF="Clock-3.html#ss3.5">3.5 Clockspeed</A> </UL> <P> <H2><A NAME="toc4">4.</A> <A HREF="Clock-4.html">Radio Clocks</A></H2> <UL> <LI><A HREF="Clock-4.html#ss4.1">4.1 CHU and the "Gadget Box"</A> <LI><A HREF="Clock-4.html#ss4.2">4.2 WWV and the "Most Accurate Clock"</A> <LI><A HREF="Clock-4.html#ss4.3">4.3 GPS and the "Totally Accurate Clock"</A> <LI><A HREF="Clock-4.html#ss4.4">4.4 Low-frequency Time Signals: DCF77, MSF(Rugby), WWVB</A> </UL> <HR> <A HREF="Clock-1.html">Next</A> Previous Contents </BODY> </HTML>
