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                            ## 一、概述
服務器上yum安裝，是從yum源去尋找安裝包，有時候，云服務器的源可能會導致無法正常安裝軟件；
如問題：
![](https://img.kancloud.cn/83/57/835755770bfaa565fc59ff534d82da5e_1586x121.png)
解決辦法是更換可用的YUM源；
## 二、配置YUM鏡像
查看
```
cd /etc/yum.repos.d
```
![](https://img.kancloud.cn/fa/93/fa93b00a049f1cbba0b127cd96d4ce1f_1597x150.png)
備份
```
mkdir backup
mv * backup/
```
更換：
```
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
```
清理：
```
yum clean all
```
更新緩存：
```
yum makecache
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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