参考链接：https://midoq.github.io/2022/05/30/Ubuntu20-04%E6%9B%B4%E6%8D%A2%E5%9B%BD%E5%86%85%E9%95%9C%E5%83%8F%E6%BA%90/

更换方法

Ubuntu采用apt作为软件安装工具，其镜像源列表记录在/etc/apt/source.list文件中。

首先将source.list复制为source.list.bak备份，然后将source.list内容改为需要的镜像源列表即可。

修改完成后保存source.list文件，执行：

sudo apt update

等待更新完成即可。

常用国内镜像源

本节均为 Ubuntu 20.04 的镜像源列表。若为其他版本，将所有focal更改为其他版本代号即可。

常用的Ubuntu版本代号如下：

Ubuntu 22.04：jammy

Ubuntu 20.04：focal

Ubuntu 18.04：bionic

Ubuntu 16.04：xenial

Ubuntu 通常采用“形容词+小动物”作为版本代号（默认的壁纸），在镜像源列表中只有第一个词。

此外，默认注释了代码源以提高速度，注释了预发布软件源（可能不稳定）。如有需要可以取消注释。

建议将所有常用镜像源保存在/etc/apt目录下，并命名为类似source.list.aliyun的形式，需要使用时直接复制替换source.list文件即可。

阿里云

deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse# deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse# deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse# deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse# deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse## Pre-released source, not recommended.# deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse# deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse

清华

deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiversedeb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiversedeb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiversedeb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse## Pre-released source, not recommended.# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse

中科大

deb https://mirrors.ustc.edu.cn/ubuntu/ focal main restricted universe multiversedeb https://mirrors.ustc.edu.cn/ubuntu/ focal-updates main restricted universe multiversedeb https://mirrors.ustc.edu.cn/ubuntu/ focal-backports main restricted universe multiversedeb https://mirrors.ustc.edu.cn/ubuntu/ focal-security main restricted universe multiverse# deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal main restricted universe multiverse# deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-updates main restricted universe multiverse# deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-backports main restricted universe multiverse# deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-security main restricted universe multiverse## Pre-released source, not recommended.# deb https://mirrors.ustc.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse# deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse