[ntp:questions] NTP not syncing

Steve Kostecke kostecke at ntp.org
Mon Nov 4 19:48:11 UTC 2013

On 2013-11-04, Antonio Marcheselli <puppa at me.la> wrote:

> That is being considered. The server runs a maintenance procedure every 
> 24hours when all the services are stopped momentarily. It could be the 
> right time for an ntpdate to run.

ntpd continuously disciplines the system clock (i.e. attempts to steer
it towards the aparent correct time).

ntpdate (or sntp) merely adjusts the system clock once each time the
utility is run. The system clock will then drift until the next

When faced with a system clock which is drifting monotonically at > 400
to 500PPM the best course of action is to bite the bullet and determine
a sane tick value. In virtually all cases this will allow ntpd to
control your clock.

Steve Kostecke <kostecke at ntp.org>
NTP Public Services Project - http://support.ntp.org/

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