一、AliyunECS服务器在安装docker服务时一直出现:错误：为仓库 ‘root_n’ 下载元数据失败

[root@MyAliyun yum.repos.d]# sudo yum install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
Docker CE Stable - x86_64                                                                                                           183 kB/s | 3.5 kB     00:00    
created by dnf config-manager from file:///root/\n                                                                                  0.0  B/s |   0  B     00:00    
Errors during downloading metadata for repository 'root_n':- Curl error (37): Couldn't read a file:// file for file:///root/\n/repodata/repomd.xml [Couldn't open file /root/\n/repodata/repomd.xml]
错误：为仓库 'root_n' 下载元数据失败 : Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

解决办法

vi /etc/yum.repos.d/root_n.repo

[root_n]
name=created by dnf config-manager from file:///root/\n
baseurl=file:///root/\n
enabled=1

将 enabled=1 修改为 enabled=0 保存变更内容就可以正常安装了

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