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This paper gives an example to describe the time synchronization configuration method of Centos 7.4 server. Share with you for your reference, the details are as follows:

1. Yum install NTP server

# yum-y install ntp

two。 Start the ntp service

# systemctl start ntpd

3. Set boot self-boot

# systemctl enable ntpd

4. Modify the startup parameters and add the-g-x parameter to allow the ntp service to work properly even when the system time error is large.

# vi / etc/sysconfig/ntpdOPTIONS= "- g-x"

5. Read the current time

# timedatectl

6. Set the time zone to Asia / Shanghai

# timedatectl set-timezone Asia/Shanghai

7. Enable NTP server synchronization

# timedatectl set-ntp yes

8. Check server time if it is still out of sync, manually synchronize server time

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

"the NTP socket is in use, exiting" error occurred.

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. If you view it through ps aux | grep ntpd, you will see that ntpd is running.

Solution:

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

10. Last check time

# timedatectl

I hope what is described in this article will be helpful to the configuration of CentOS server.

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