以下哪个命令能够完成虚拟机挂载CentOS-7-x86_64-DVD-1511.iso文件?( )
A. mount -o loop CentOS-7-x86_64-DVD-1511.iso /mnt/
B. umount /mnt/
C. mkdir /opt/centos
D. mount -o loop /dev/cdrom /mnt/
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关闭防火墙应在哪个节点执行哪条语句?( )
A. 【controller/compute】 systemctl stop firewalld
B. 【controller/compute】systemctl disable firewalld
C. 【controller】 systemctl stop firewalld
D. 【compute】 systemctl stop firewalld
设置防火墙开机不自启应在哪个节点执行哪条语句?( )
A. 【controller/compute】 systemctl stop firewalld
B. 【controller/compute】systemctl disable firewalld
C. 【controller】 systemctl disable firewalld
D. 【compute】 systemctl disable firewalld
关于防火墙命令,设置防火墙开机不自启动的命令是?( )
A. systemctl stop firewalld
B. systemctl diable firewalld
C. systemctl stop firewall
D. systemctl disable firewall
下列哪条命令可以查询防火墙状态?( )
A. systemctl stop firewalld
B. systemctl disable firewalld
C. systemctl status firewalld
D. 以上都可以
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