## yum“下载元数据失败” UOS V20执行yum报告以下错误: ``` 下载元数据失败 :Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried ``` 解决方法: 修改`/etc/yum.repos.d/UniontechOS.repo`,将`kongzi`替换成`ufu/kongzi`。