早些时候，买了台辽宁机器，在装wget的时候遇到了报错 问题 [root@lnasuAC1pA6yiq ~]# yum install wget CentOS Linux 8 - AppStream 11 B/s | 38 B 00:03 错误：为仓库 ‘appstream’ 下载元数据失败 : Cannot prepare internal mirrorlist: No URLs in mirrorlist 查找