Includes most of the programs described here. Instructions I can email them to you, but read the section onĪny program that affects the RTC or the system time, which Now use hwclock(8) instead, which has much betterĭocumentation. System, but I've dropped that section because most distributions Previous versions included detailed instructions for the oldĬlock(8) program for anyone still running an older Written, so I'm not going to repeat that information here. Very accurate by itself), and provides pointers to several more This mini-HOWTO describes the low-tech approach (which can be To an external time source, such as a network time server Those few who do care often want to sync the system clock.Most people don't seem to care what time it is anyway.Search the man pages in numerical order if you don't giveĪ section number, others search in the order specified in The man page for clock(3), which is not what you On how to set up linux, and it can't be set upĪutomatically (unless you have an external time source), It's not mentioned in most of the general documentation.But most peopleĭon't know how to set it up, for several reasons: Linux provides a simple way to correctįor this in software, which can make the clock *very*Īccurate, even without an external time source. Notoriously inaccurate, usually gaining or losing the sameĪmount of time each day. The Real-Time-Clock (RTC) chips used on PC motherboards are Introduction 1.1 Does Anybody Really Know What Time It Is? 4.4 Low-frequency Time Signals: DCF77, MSF(Rugby), WWVBġ.4.3 GPS and the "Totally Accurate Clock".3.3 Xntpd and ntpd: the Network Time Protocol.2.4 How Linux keeps Track of Time Zones.2.3 Should the RTC use Local Time or UTC, and What About DST?.1.2 Where to Find Stuff: "The Usual Places".1.1 Does Anybody Really Know What Time It Is?.How to set and keep your computer's clock on time. The Clock Mini-HOWTO Ron Bean, November 2000
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