Centos7 time synchronization server

Centos7 time synchronization server

It's a bit difficult today. Because of inconsistent server time, many log logs are missing during data synchronization.

So. Let's talk about the time server first.

Start:

Method 1: simple, efficient, and easy to use

# Ntpdate-u ntp. api. bz

Method 2: Time Server: 1) #yuminstallntp 2） #vi/etc/ntp.conf Comment a line restrictdefaultignore Add a row restrict192.168.1.0mask255.255.255.0nomodifynotrap # Server address 3）. #vi/etc/ntp/step-tickers Add a row (you can also rewrite it based on the original one) pool.ntp.org In this way, the international standard time server will be automatically connected each time ntpd is started; 4）. #systemctlrestartntpd 5）. #ss-an|grep123 Make sure that the port is opened in udp mode. 6） # Systemctlenablentpdate. service (added to auto-start upon startup) 7） # Date (whether the detection time is reliable) Monday 1, January 18, 2016: 55CST

In this way, the time synchronization problem of multiple machines can be solved.