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How to configure the NTP client to access only US NTP pool

Owned by Customer Success & Engineering

Last updated: Mar 13, 2023

1 min read

1 Overview
2 Steps of Configuration
3 Change in multiple host (If Required)

Overview

This document will help you to configure NTP (The Network Time Protocol) client to access only the US NTP pool.

Steps of Configuration

Log in as the root user
Run the command: vi /etc/ntp.conf
Please add the following in the conf file.
# Use public servers from the pool.ntp.org project. # Please consider joining the pool (http://www.pool.ntp.org/join.html). server 0.us.pool.ntp.org server 1.us.pool.ntp.org server 2.us.pool.ntp.org server 3.us.pool.ntp.org
Restart the NTPD services with the command : systemctl restart ntpd

Change in multiple host (If Required)

Please use the script below :

#!/bin/bash
pass=testpass
for ip in 192.168.9.{2..254}
do
    timeout 5 sshpass -p "$pass" scp -o 'StrictHostKeyChecking no' -r /etc/ntp.conf root@$ip:/etc/ntp.conf   
    timeout 10 sshpass -p "$pass" ssh -o 'StrictHostKeyChecking no' root@$ip 'systemctl restart ntpd' 
done

Reference Link : https://www.thegeekstuff.com/2014/06/linux-ntp-server-client/

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