yum -y install ntp
systemctl status ntpd.service    #查看服务状态
systemctl enable ntpd.service   #开机自启动
systemctl start ntpd.service

1.首先从http://download.fedoraproject.org/pub/

 File “/usr/bin/yum”, line 29, in <module>
    yummain.user_main(sys.argv[1:], exit_code=True