ubuntu20.04如何更换国内源

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ubuntu20.04更换国内源的方法。以下更换为阿里云。如果是自己安装的Ubuntu，在安装设置时就可以直接更换为阿里云“https://mirrors.aliyun.com/ubuntu/”直接更换这个地址就可以了

1.打开终端。

2.输入以下命令备份原来的源。

1. sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

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3.再输入以下命令打开sources.list配置文件更换源。

1. sudo vim/etc/apt/sources.list
   
2. 
   
3. //配置内容如下
   
4. 
   
5. deb https://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
   
6. 
   
7. deb https://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
   
8. 
   
9. deb https://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
   
10. 
    
11. deb https://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
    
12. 
    
13. deb https://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
    
14. 
    
15. deb-src https://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
    
16. 
    
17. deb-src https://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
    
18. 
    
19. deb-src https://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
    
20. 
    
21. deb-src https://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
    
22. 
    
23. deb-src https://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse focal

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4.再输入命令更新源。

1. sudo apt-get update

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5.最后输入命令更新一下软件即可。

1. sudo apt-get upgrade

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大功告成。