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                            ## 問題 Yum on Centos 8 - Failed to download metadata for repo 'AppStream
原文地址：https://baijiahao.baidu.com/s?id=1729165789470472091&wfr=spider&for=pc

解決辦法如下：

1、進入yum的repos目錄

> `cd /etc/yum.repos.d/`

2、修改所有的CentOS文件內容



> sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-\*
sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-\*

3、更新yum源為阿里鏡像


> wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo 
yum clean all
yum makecache






                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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