【controller】节点安装并启动ntp服务后,如何配置【compute】节点?( )
A. 【compute】ntpdate controller ,【compute】systemctl enable ntpd
B. 【compute】ntpdate controller
C. 【compute】systemctl enable ntpd
D. 【compute】什么也不用做
下列哪条命令是安装ntp服务的?( )
A. service ntpd start
B. systemctl enable ntpd
C. yum remove ntp –y
D. yum -y install ntp
下列哪条命令是卸载ntp服务的?( )
A. service ntpd start
B. systemctl enable ntpd
C. yum remove ntp –y
D. yum -y install ntp
下列哪条命令是启动Mysql数据库服务的?( )
A. systemctl enable mariadb.service
B. systemctl start mariadb.service
C. systemctl status mariadb.service
D. 以上都正确