问题
执行yum install wget 时出现错误：
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
There are no enabled repos.
Run “yum repolist all” to see the repos you have.
To enable Red Hat Subscription Management repositories:
subscription-manager repos --enable
To enable custom repositories:
yum-config-manager --enable
解决办法：从阿里云重新下载依赖仓库
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
再执行一次
