Tag: ntp

Change NTP server on a Linux system to a local NTP server

  1. Open the Chrony configuration file: 
    sudo nano /etc/chrony/chrony.conf
  2. Find the existing NTP servers and comment them out by adding a # at the beginning of the line, or remove them if you prefer: 
    # server 0.pool.ntp.org iburst
# server 1.pool.ntp.org iburst
  3. Add your local NTP server:

    Replace local_ntp_server_ip with the IP address or hostname of your local NTP server:

    server local_ntp_server_ip iburst
  4. Save and exit the editor (for nano, press CTRL+X, then Y, and Enter).
  5. Restart the Chrony service to apply changes: 
    sudo systemctl restart chronyd
  6. Verify the synchronization:

    After a few minutes, you can check the NTP synchronization status:

    chronyc sources

     

Setup an NTP Server on Windows 10

At first, enable the Windows Time services from Services console. Open Services console using by typing services.msc at run window (Windows Key + R). Click in Standard Services and look for Windows Time service. Once you find the service, click on it and set the Start Up type as Automatic and click on Start to start the service.

2. Next, we will enable the NTP-server by manipulating Window registry file for Service W32Time. Open Window registry via the run option (Windows + R) and then entering regedit and navigate to the below location.

Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer

Once you reach above location, click on Enabled entry and change the value data from 0 to 1 as shown below.

3. Checked the NTP configuration from command line using command w32tm /query /configuration. Below output will indicate that NTP-server is not enabled yet.

4. Next, restart Windows Time service which was enabled in step 1 or update the W32tm from command line using command w32tm /config /update. This will enable the Window10 machine as an NTP Server.

You now have your NTP server running and can now point all your nodes on your network to the IP address of the machine.

References
https://support.hanwhavision.com/hc/en-us/articles/26570683589529-How-to-Setup-an-NTP-Server-on-Windows-10

Install chrony on Ubuntu 22.04

Chrony is an implementation of the Network Time Protocol (NTP) that runs on Unix-like operating systems (including Linux and macOS) and is released under the GNU GPL v2. It can synchronize the system clock with NTP servers, reference clocks (e.g. GPS receiver), and manual input using wristwatch and keyboard. It can also operate as an NTPv4 (RFC 5905) server and peer to provide a time service to other computers in the network.

apt install -y chrony
timedatectl set-ntp true
systemctl enable chrony && systemctl restart chrony
timedatectl set-timezone Asia/Tehran
chronyc sourcestats -v
chronyc tracking -v
date

References
https://installati.one/install-chrony-ubuntu-22-04/

Set Up Time Synchronization on Ubuntu with ntpd

Though timesyncd is fine for most purposes, some applications that are very sensitive to even the slightest perturbations in time may be better served by ntpd, as it uses more sophisticated techniques to constantly and gradually keep the system time on track.

sudo timedatectl set-ntp no
timedatectl
sudo apt-get install ntp
sudo ntpq -p

References

https://www.digitalocean.com/community/tutorials/how-to-set-up-time-synchronization-on-ubuntu-16-04