Questions tagged [time-synchronization]
257 questions
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Best practice for external NTP Server on Windows AD network
I have a Windows Hyper-V network. I have 2 domain controllers; both are VMs. DC1 runs on Host01 and DC2 runs on Host02.
On each Domain Controller:
w32tm /query /source returns VM IC Time Synchronization Provider.
On each Host:
w32tm /query /source…
E C
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1 answer
High time accuracy on Windows Servers - alternatives to w32tm?
Microsoft's Windows Time Service is not designed to, and does not maintain second accuracy:
http://blogs.technet.com/askds/archive/2007/10/23/high-accuracy-w32time-requirements.aspx
What software is available for Windows servers that maintains…
Adam Davis
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1 answer
How to Set Up Time Synchronization with NTP on Ubuntu 20.04.1 LTS
After updating the base system with the latest available packages:
apt-get update -y
and
root@localhost:~# timedatectl
Local time: Wed 2021-01-06 08:03:11 UTC
Universal time: Wed 2021-01-06 08:03:11 UTC
…
Fèlix Boniquet Pelfort
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0 answers
PPS Integration with chrony
I am trying to get chrony to ingest a PPS signal to compare against just an NTP server. The PPS signal is recognized when I do ppswatch and ppstest, but when I do chronyc sources, the LastRX field occasionally goes up to 20+ while the NTP server…
bchang32
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0
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How to synchronize the timing of two or more distributed wireless nodes?
What is the best approach(s)/ method(s) to synchronize the timing (clocks) of two or more distributed wireless nodes such that these are coherent with each other and not slipping cycles?
dani
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0
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Centos NTP time skew alerts
I have a couple of NTP Stratum 2 servers, and these are in sync with a Stratum 1 GPS appliance, and also peered between them selves. I would be interested in creating a job, which will create an alert if the time difference between Stratum 1 and…
Mus
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Configure Windows NTP service for Linux clients
I have 100 Linux clients and a Windows Server 2016 in a closed network environment. I would like to have the Ubuntu clients time sync with the Windows Server's date-time. I have done this on internet-open clients but I've not found found how to do…
Robert Daniels
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0
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2 answers
Domain-joined computer won't switch time source to domain from "Local CMOS Clock"
My situation is almost identical to the one cited in this post:
How to change time source from "Local CMOS Clock" to "DC"
I have a domain-joined computer that is showing "Local CMOS Clock" as the source despite my attempts to change it. Here's what…
Jason O
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CentOS 7 - how does timedatectl sync time and date without NTP?
I am creating automated tests for an rsync-like utility and I need to be able to set the clock back 24 hours for one of the tests. However, when I use timedatectl to set the time and date they revert back to the current time after 15…
Not a machine
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What sources does public NTP servers use to ensure time sync?
As from the title, I would like to know what sources “pool.ntp.org” and other big NTP service providers use in order to ensure they are in sync and serving clients the exact date and time.
Marco
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Query Network Client Date
Question: Is there a way to ping or query the date of a client linux computer for the purpose of verifying time synchronization?
Setup: I have two computers on a network. One linux machine (machine A) is a chrony server that is synchronizing its…
aerotec88
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1 answer
How do I force a domain controller to sync with the PDC?
DC2 (a VM) is not syncing to DC1 (a physical server). On DC2 I get:
PS C:\> w32tm /query /source
Local CMOS Clock
What must I do so that DC2 syncs to DC1 as its time source?
Background: I had to replace DC1 and it was my operations master. There…
Alan
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2008r2 clock running fast
I have 27 2008R2 servers (all Hyper-V guests) that recently started running fast. There are other 2008R2 servers on the same hosts that run spot on. The time averages from 2 to 3 minutes fast but at times has gotten to as much as 20 minutes. If I…
Mark
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3 answers
Properly setting date on Linux machines
I am trying to set the system date on my linux machine. If it matters, it is an Amazon EC2 machine that I provisioned. I tried to set the date with this command:
sudo date -s "19 APR 2018 11:14:00";
However the date does not stay set for long; when…
0
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1 answer
How to enable NTP module CentOS 7?
I have one server running CentOS 7
to install ntp module I followed the below steps:
yum install -y ntp
systemctl start ntpd
systemctl enable ntpd
systemctl status ntpd
timedatectl set-timezone America/Mexico_City
the service is running, I did not…
Frederick Álvarez
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