问题概述: 重启ntp服务报错Failed to restart ntpd.service: Unit is masked,使用systemctl unmask ntpd.service命令关闭屏蔽还是报错Failed to restart ntpd.service: Unit is masked 解决方法: 重装ntp服务 yum remove ntpyum install ntpsystemctl start ntpd.servicesystemctl enable ntpd.servicesystemctl status ntpd.service