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Operating Systems Linux NTPD seems to be not syncing !!! Post 94592 by csaha on Monday 2nd of January 2006 01:59:49 AM
Old 01-02-2006
NTPD seems to be not syncing !!!

Hi Linux Admin Guys

My onsite server is always 15 min slow and seems like NTPD (Network Time Protocol (NTP) daemon) not running properly. can anyone suggest me how to rectify this problem? we can't seem to get NTP to properly sync the clock.

Any help is resolving the issue will be helpful. Thanks in advance to all

Thanks
Chirantan
 

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CHRONY(1)							   User's Manual							 CHRONY(1)

NAME
chrony - programs for keeping computer clocks accurate SYNOPSIS
chronyc [OPTIONS] chronyd [OPTIONS] DESCRIPTION
chrony is a pair of programs for keeping computer clocks accurate. chronyd is a background (daemon) program and chronyc is a command-line interface to it. Time reference sources for chronyd can be RFC1305 NTP servers, human (via keyboard and chronyc), or the computer's real- time clock at boot time (Linux only). chronyd can determine the rate at which the computer gains or loses time and compensate for it while no external reference is present. Its use of NTP servers can be switched on and off (through chronyc) to support computers with dial- up/intermittent access to the Internet, and it can also act as an RFC1305-compatible NTP server. USAGE
chronyc is a command-line interface program which can be used to monitor chronyd's performance and to change various operating parameters whilst it is running. chronyd's main function is to obtain measurements of the true (UTC) time from one of several sources, and correct the system clock accord- ingly. It also works out the rate at which the system clock gains or loses time and uses this information to keep it accurate between mea- surements from the reference. The reference time can be derived from either Network Time Protocol (NTP) servers, reference clocks, or wristwatch-and-keyboard (via chronyc). The main source of information about the Network Time Protocol is http://www.eecis.udel.edu/~ntp. It is designed so that it can work on computers which only have intermittent access to reference sources, for example computers which use a dial-up account to access the Internet. Of course, it will work on computers with permanent connections too. In addition, for Linux 2.0.x (for x >= 32) or 2.2 onwards, chronyd can monitor the system's real time clock performance, so the system can maintain accurate time even across reboots. Typical accuracies available between 2 machines are On an ethernet LAN : 100-200 microseconds, often much better On a V32bis dial-up modem connection : 10's of milliseconds (from one session to the next) With a good reference clock the accuracy can reach one microsecond. chronyd can also operate as an RFC1305-compatible NTP server and peer. SEE ALSO
chronyc(1), chrony(1) http://chrony.tuxfamily.org/ AUTHOR
Richard Curnow <rc@rc0.org.uk> This man-page was written by Jan Schaumann <jschauma@netmeister.org> as part of "The Missing Man Pages Project". Please see http://www.netmeister.org/misc/m2p2/index.html for details. The complete chrony documentation is supplied in texinfo format. chrony December 04, 2009 CHRONY(1)
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