rhce考试中ntp只需要配置客户端即可~~~
yum -y install chrony
vim /etc/chrony.conf
#server 0.rhel.pool.ntp.org iburst
#server 1.rhel.pool.ntp.org iburst
#server 2.rhel.pool.ntp.org iburst
#server 3.rhel.pool.ntp.org iburst
server classroom.example.com iburst 加上一行 上面的全部注释
systemctl restart chronyd