我使用这个教程更新,然后输入yum update -y 提示
Errors during downloading metadata for repository 'appstream':
- Status code: 404 for https://vault.epel.cloud/centos/8-stream/AppStream/x86_64/os/repodata/repomd.xml (IP: 104.21.92.124)
错误:为仓库 'appstream' 下载元数据失败 : Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried
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