阿里云centos8 Error: Failed to download metadata for repo ‘AppStream‘

问题描述 使用yum安装时出现如下错误： Errors during downloading metadata for repository 'AppStream': - Status code: 404 for http://mirrors.cloud.aliyuncs.com/centos/8/AppStream/x86_64/os/repodata/repomd.xml (IP: 100.100.2.148) Error: Failed to download metadata for repo 'AppStream': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried 问题分析 阿里云解释：centos8官方源已下线，建议切换centos-vault源 解决方法 1.删除AppStream源 rm -f /etc/yum.repos.d/CentOS-AppStream.repo 2.取消并备份旧yum源（可直接删除） mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup 3.下载vault源 curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo 4.清除yum缓存 yum clean all 5.生成新缓存 yum makecache 附加 如果出现 Couldn't resolve host 'mirrors.cloud.aliyuncs.com' ，非阿里云服务器无法访问其内网域名，需要作替换，eg： sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo ———————————————— 版权声明：本文为CSDN博主「脱发队长」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。 原文链接：https://blog.csdn.net/manong__/article/details/122842090