Centos 7.4 Server time Synchronization configuration method [Based on NTP Service]

This article illustrates the Centos 7.4 server time synchronization configuration approach. To share for your reference, the details are as follows:

yum Install NTP server

#yum -y install ntp

Start the ntp service

#systemctl start ntpd

3. Set startup time

#systemctl enable ntpd

4. Modify startup parameters and add -ES16en-ES17en parameters to allow ntp service to work normally even when the system time error is large

#vi /etc/sysconfig/ntpd
OPTIONS= "-g -x"

5. Read the current time

#timedatectl

6. Set the time zone for Asia/Shanghai

#timedatectl set-timezone Asia/Shanghai

7. Enable NTP server synchronization

#timedatectl set-ntp yes

8. Check the server time. If the server time is still out of sync, manually synchronize the server time

#/usr/sbin/ntpdate ntp.api.bz

Error "the NTP socket is in use, exiting".
8 Nov 09:57:02 ntpdate[4726]:the NTP socket is in use, exiting

9. The reason for this error is that the system ntpd server is running. Check with ps aux | grep ntpd and you will see that ntpd is running.

Solutions:

#systemctl stop ntpd 
#/usr/sbin/ntpdate ntp.api.bz

10. Check the time last

#timedatectl

Hopefully, this article has helped you with your CentOS server configuration.