Given install the ntpd and ntpdate clients on our Linux host.
(Same with Ubuntu and other Unix server)
$ yum install ntp ntpdate
If yum is not installed, just run the following command:
$ sudo apt install yum
Then start and enable the ntpd service.
$ systemctl start ntpd $ systemctl enable ntpd $ systemctl status ntpd
Then run the following command to configure the NTP Servers.
$ ntpdate -u -s 0.centos.pool.ntp.org 1.centos.pool.ntp.org 2.centos.pool.ntp.org
Above command telling the ntpdate to use an unprivileged port for outgoing packets with the -u switch and to write logging output to the system syslog facility using the -s switch.
Then restart the ntpd daemon.
# systemctl restart ntpd
Then check if NTP synchronization is enabled and running.
# timedatectl
And for the last step, set the hardware clock to the current system time using the -w switch.
# hwclock -w
Congratulations! You’ve now successfully set your NTP client on CentOS.
