1.安装

yum install ntp -y

2.启动

systemctl start ntpd; systemctl enable ntpd

3.配置

vim /etc/ntp.conf

#注释下面4行

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

替换成中国时间服务器：

#http://www.pool.ntp.org/zone/cn

server 0.cn.pool.ntp.org
server 1.cn.pool.ntp.org
server 2.cn.pool.ntp.org
server 3.cn.pool.ntp.org

4.重启

systemctl restart ntpd