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Questions tagged [time-synchronization]

257 questions
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Ntpd on local network - Preventing clock drift causing high offsets

I have a local network with a microcontroller ARM as the NTP server and I have a desktop computer running with ubuntu 16.04 LTS as a NTP client. Once I start ntpd -g -c /etc/ntp.conf with the following ntp config file server 192.168.0.11 minpoll 4…
Daniel R.
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linux system time temporally jumps

I saw a strange system time changing behavior in some (hardware) servers: in /var/logs/syslog, the date time preceding each log message sometimes change to a random one and gets back to normal in the next message, like the following: Feb 22 2018…
Zhaohui Yang
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NTP not syncing, only syncs on service restart

My ubuntu 11.10 server has been sitting there quite happily for the last 3 - 4 months, then suddenly the time started going out of sync by one hour. I'm not sure why, nothing has changed re the configuration of the server, i read it can be down to…
Michael Barrett
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What consequences / implications can arise from a wrong system clock?

What issues can you think of that may arise from a wrong system clock setting ? Primarily interested in potential problems affecting servers and Linux or UNIX-like systems in particular. And how severe are these consequences, depending on how much…
Arc
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hwclock: Cannot access the Hardware Clock via any known method

On a Debian server, I'm having problem with hwclock: $ hwclock --show hwclock: Cannot access the Hardware Clock via any known method. hwclock: Use the --debug option to see the details of our search for an access method. System runs on backports…
Tombart
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How to set up local ntp server without internet access on ubuntu?

I have tried several guides on how to set up a local ntp server on ubuntu but none seem to work correctly. My servers are drifting heavily in time for some reason and I have to keep their time close together because I run databases that require…
j9dy
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Active Directory Time Synchronisation - Time-Service Event ID 50

I have an Active Directory domain with two DCs. The first DC in the forest/domain is Server 2012, the second is 2008 R2. The first DC holds the PDC Emulator role. I sporadically receive a warning from the Time-Service source, event ID 50: The time…
George
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how to auto-run ntdpdate command?

I have a few dedicated servers and for some reason they are totally unable to mantain the time properly synchronized, every few days they start having differences of minutes in the clock. So I have to manually open Putty, connect, login, and run the…
andreszs
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How to synchronize the clock of a windows server 2003 domain server?

Given a windows server 2003 domain server, I'd like to sync it's time to (any) external time services (it's off a couple of minutes). How to do this 1, manually; 2, in an automated manner every week?
Silver Dragon
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Allow Active Directory users to disable datetime sync

I have recently migrated my company to Active Directory. With it comes a default setting that will force time synchronization to be enabled. Trouble is, some users need to change their datetime settings for testing purposes, but automatic sync will…
Nathan.Eilisha Shiraini
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Is it possible to increase the rate at which ntpd updates the system clock?

We have some hosts that have gotten out of sync due to ntpd being mis-configured, with an ntp server that was unreachable. Our clocks on some hosts (CentOS 6) are now upwards of 30 seconds off (in the future it seems, for most of these). It looks…
MrDuk
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Time synchronization in an heterogeneous environment

In a mixed environment, where machines can be running under Windows (most), Linux (a few), sometimes Android ... what is the best solution to have time synchronization with an accuracy close to milliseconds? We are developing a microservices based…
David Brabant
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Can't access some clients using w32tm /stripchart - error: 0x800705B4

I'm trying to track down a time synchronisation problem. I've got a DC in a remote branch. w32tm /dumpreg /subkey:Parameters reveals Type = NT5DS and the Type means its sync'ing with the domain, I understand. I've checked using: w32tm /stripchart…
serialhobbyist
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How can I check if my time sync is correct?

I have updated a W2K3 settings according to the steps shown here: http://support.microsoft.com/kb/816042#LetMeFixItMyselfAlways2 The peers list I use is: 0.asia.pool.ntp.org,0x1 1.asia.pool.ntp.org,0x1 2.asia.pool.ntp.org,0x1…
Saariko
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Reliable Time Protocol Server Online?

I have some OLD legacy hardware that I'd like to keep time synchronized on. It supports the TIME protocol (not NTP). Are there any reliable TIME servers online anymore? If so, where? -M
Mike B
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