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Questions tagged [ntpd]

The Network Time Protocol daemon (NTPd) is a daemon program that synchronizes the system time with time servers using the Network Time Protocol (NTP).

The Network Time Protocol daemon () is a daemon that synchronizes the system time with time servers using the Network Time Protocol ().

Website: http://www.ntp.org

Man page: http://linux.die.net/man/8/ntpd

Wikipedia: http://en.wikipedia.org/wiki/Ntpd

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enable/disable ntp service on ubuntu 12.04

Our application runs on Ubuntu 12.04 Precise. On this server, we have both ntpdate and ntp. How to enable and disable the NTP service on-demand? I tried # sudo update-rc.d -f ntp remove/default and # sudo update-rc.d ntp enable/disable…
ntphelp
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KVM guest clock sync with host

I'm running KVM w/ centos 6.x. My guest vm clocks are booting with a 1-2 second lag from their host. My clocksource for the host is ntp. My clocksource for the guest is "kvm-clock", but I need to run ntpd on the guest as well. It takes roughly 3…
timeout
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Building a local time server

I am trying to install a time server on a local Ubuntu machine, so other servers in my network would sync with it. We have decided to install our own time server, rather than letting each server update from an external server, to minimize the…
Adam Matan
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does NTP minpoll-maxpoll control sync intervals?

Do the NTP minpoll and maxpoll configuration attributes control the sync interval or do they only control the polling interval? where: polling = messaging with NTP servers to estimate the offset syncing = actually updating the system clock
Jonathan
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Use ntpd to log time adjustments rather than set system clock

Is it possible to use ntpd to log all time resets and adjustments rather than set system clock?
user626528
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NTP doesn't sync

I'm using Meinberg NTP to sync the time in a VPS. The clock refuses to sync - there's a ~30s shift comparing to other servers. Also ntpq -p is continuously showing zeros for reach, delays and jitters, which means something's wrong... Actions I've…
Jonathan
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Server Time is *WAY* Off

The time on my server is about 19 hours behind and I cannot for the life of me figure out how to synchronize it. I did follow the steps here, and this is the output: [root@ip-72-167-39-231 ~]# /sbin/service ntpd stop Shutting down ntpd: …
Thomas Thorogood
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How time is affected by the ntpd and /etc/localtime

Can anyone explain how ntpd and /etc/localtime and system clock interact with each other, in UNIX or more specific in freeBSD? I'm giving the following long description of the concepts in case I misunderstand some of them so that you can point it…
Figo
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Setting up an NTP server for my LAN

I am trying to setup my Debian 6 (Squeeze) VM to act as a local time server for my network. I have it set to sync with tock.usno.navy.mil which is a stratum 1 server. I am having some problems finding any information on how to setup the ntp daemon…
AtomicPorkchop
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Will NTP work in an isolated network ( in absence of a reliable time source)

I am investigatiing a typical NTP problem. The setup is as follows :- FreeBSD is being compiled and run on Opensolaris. The config file on OpenSolaris has entry of linux and another opensolaris machine as server and these server machines are…
Anand
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What is the most simple way to automatically update the time on a server?

On ubuntu server my usual solution is just to install the ntp package and call it a day. This installs all the binaries I need and has ntpd start at boot time. Right now I'm working on a server configuration that will be replicated across many…
John Bachir
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ntpstat response fine but server time out of sync

I found out that the ntpd service that I've set up a few weeks ago on a Centos5 machine doesn't correctly synchronize the server time. I detected an offset of more than 5 minutes (by stopping ntpd and executing ntpdate). After setting up the service…
zedoo
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NTP client synchronizes with LOCAL instead of stratum 1

I have 2 NTP servers. One synchronized directly with a GPS clock (I will call this server 185), so st 0. Then I have a second one (Let's call it 186) that should synchronize with the 185 since it is st 1 but instead it synchronizes with…
Moncloa
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How to test whether NTP server is secured or not

We are trying few of the configurations of NTP in ntp.conf file and want to be sure whether the NTP server is secured or not. Following the recommendation provided here: https://support.ntp.org/Support/AccessRestrictions#Section_6.5.1.2.1. we added…
Anon
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NTP/Chrony not keeping time synchronized on CentOS 7.9 (VM running on VMware ESXi)

I have 3 servers running CentOS 7.9.2009 in a data center (VMware ESXi). These servers report that the time is not synchronized. I have a similar test environment running on an inhouse VMware ESXi server where the servers sync. the time Ok. The…
John Dalsgaard
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