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
下列哪条命令是设置Mysql数据库服务开机自启的?( )
A. systemctl enable mariadb.service
B. systemctl start mariadb.service
C. systemctl status mariadb.service
D. 以上都正确
下列哪条命令是查询Mysql数据库服务状态的?( )
A. systemctl enable mariadb.service
B. systemctl start mariadb.service
C. systemctl status mariadb.service
D. 以上都正确
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