安装linux的问题

如果找不到ifconfigyuminstallnet-tools切换阿里的yum源1.备份之前的仓库文件mv/etc/yum.repos.d/CentOS-Base.repo/etc/百胜回购。d/CentOS-Base.repo.back2，下载阿里云的仓库文件curl-o/etc/yum.repos.d/CentOS-Base.repohttp://mirrors.aliyun.com/repo/Centos-7。repo3,清除缓存yumcleanallyummakecache