To install chrony
# yum install chrony -y
Then, make sure to include some legit ntp servers in /etc/chrony.conf. In this case, we are using centos ntp pool servers.
# cat /etc/chrony.conf
...
server 0.centos.pool.ntp.org iburst
server 1.centos.pool.ntp.org iburst
server 2.centos.pool.ntp.org iburst
server 3.centos.pool.ntp.org iburst
...
Start chronyd (chrony daemon)
# systemctl start chronydChrony will gradually update the system clock to follow the ntp servers, once chronyd is started. But if you want to chrony to update the time quickly, just use below command
# chronyc makestep
To start chronyd on boot:
# systemctl enable chronyd
To check if the time has been synced (make sure one of the server has ^* on the left hand side)
# chronyc sources -v
...
^* time.cloudflare.com 0 6 0 - +0ns[ +0ns] +/- 0ns
...
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