Centos 8无法使用yum解决办法

小吉

CentOS 8 （非 Stream 版）已提前进入 EOL 停止服务阶段，因此镜像已被官方移动。如果您正在寻找关于这些系统的镜像，请参考 centos-vault 的帮助。

1. CentOS 8 结束生命周期如何切换源
   
2. 公网用户：
   
3. mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
   
4. wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
   
5. yum clean all && yum makecache
   
6. 阿里云ecs用户：
   
7. mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
   
8. wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
   
9. sed -i 's/mirrors.cloud.aliyuncs.com/url_tmp/g' /etc/yum.repos.d/CentOS-Base.repo && sed -i 's/mirrors.aliyun.com/mirrors.cloud.aliyuncs.com/g' /etc/yum.repos.d/CentOS-Base.repo && sed -i 's/url_tmp/mirrors.aliyun.com/g' /etc/yum.repos.d/CentOS-Base.repo
   
10. yum clean all && yum makecache

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来源:https://developer.aliyun.com/mirror/centos?spm=a2c6h.13651102.0.0.3e221b11l65jZ7

报错：

1. CentOS Linux 8 - AppStream                                                                                    6.2 kB/s | 2.3 kB     00:00   
   
2. Errors during downloading metadata for repository 'appstream':
   
3.   - Status code: 404 for http://mirrors.cloud.aliyuncs.com/centos/8/AppStream/x86_64/os/repodata/repomd.xml (IP: 100.100.2.148)
   
4. Error: Failed to download metadata for repo 'appstream': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

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