Linux Time Synchronization Service

1. Synchronize network time to System time ntpdate command

[[Email protected] test1]# Date

Tue SEP 6 07:12:03 CST 2016

[Email protected] test1]# ntpdate cn.pool.ntp.org

6 Sep 09:18:23 ntpdate[13047]: Step time server 120.25.108.11 offset 7566.199829 sec

[[Email protected] test1]# Date

Tue SEP 6 09:18:25 CST 2016

Cn.pool.ntp.org (The official Time synchronization server IP domain name of China National Timing Center)

After synchronizing the network time to the system time, you can use HWCLOCK-W to synchronize the system time to hardware time.

2. Build your own Time synchronization server

Time Synchronization server settings:

Systemctl Stop Firewalld

Vim/etc/chrony.conf

Allow 172.25.254.0/24

Local stratum 10

Systemctl Restart Chrony

3. How to synchronize the system time automatically (synchronize server time)

Chronyc Sources-v See who is syncing with.

1. Determine the time source address (which time to synchronize)

172.25.254.254

2. Determine the time synchronization service used by the customer's host

Chronyd.service

3. Load the time source address in the Chronyd.service service

Vim/etc/chrony.conf

Server172.25.254.254 iburst

#systemctl Restart Chronyd.service

This article from the "Technology life, Simple not simple" blog, please be sure to keep this source http://willis.blog.51cto.com/11907152/1846771

Linux Time Synchronization Service