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：
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse deb 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 multiverse deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse deb 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 multiverse deb https://mirrors.ustc.edu.cn/ubuntu/ focal-updates main restricted universe multiverse deb https://mirrors.ustc.edu.cn/ubuntu/ focal-backports main restricted universe multiverse deb 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
网易：
deb http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ focal-backports main restricted universe multiverse # deb-src http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse # deb-src http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse # deb-src http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse # deb-src http://mirrors.163.com/ubuntu/ focal-backports main restricted universe multiverse ## Pre-released source, not recommended. # deb http://mirrors.163.com/ubuntu/ focal-proposed main restricted universe multiverse # deb-src http://mirrors.163.com/ubuntu/ focal-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ focal-backports main restricted universe multiverse
# deb-src http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse
# deb-src http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse
# deb-src http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse
# deb-src http://mirrors.163.com/ubuntu/ focal-backports main restricted universe multiverse
## Pre-released source, not recommended.
# deb http://mirrors.163.com/ubuntu/ focal-proposed main restricted universe multiverse
# deb-src http://mirrors.163.com/ubuntu/ focal-proposed main restricted universe multiverse
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原文链接：https://blog.csdn.net/eloudy/article/details/139904342