创建大二层虚拟化网络 这就是我作业要用的，别看了（ ensp r1 int g0/0/0 ip add 192.168.20.10 255.255.255.0 q int g0/0/1 ip addr 192.168.1.1 255.255.255.0 q ip route-st 192.168.30.0 24 192.
CentOs7/8 更換阿里雲YUM 源 首先清空原來的yum源 rm -rf /etc/yum.repos.d/* CentOs 8 curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.reposhell CentOs 7 cu
