Ubuntu20.04換源

參考連結：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/

更換方法

Ubuntu採用apt作為軟體安裝工具，其映象源列表記錄在/etc/apt/source.list檔案中。

首先將source.list複製為source.list.bak備份，然後將source.list內容改為需要的映象源列表即可。

修改完成後儲存source.list檔案，執行：

sudo apt update

等待更新完成即可。

常用國內映象源

本節均為 Ubuntu 20.04 的映象源列表。若為其他版本，將所有focal更改為其他版本代號即可。

常用的Ubuntu版本代號如下：

• Ubuntu 22.04：jammy
• Ubuntu 20.04：focal
• Ubuntu 18.04：bionic
• Ubuntu 16.04：xenial

Ubuntu 通常採用“形容詞+小動物”作為版本代號（預設的桌布），在映象源列表中只有第一個詞。

此外，預設註釋了程式碼源以提高速度，註釋了預釋出軟體源（可能不穩定）。如有需要可以取消註釋。

建議將所有常用映象源儲存在/etc/apt目錄下，並命名為類似source.list.aliyun的形式，需要使用時直接複製替換source.list檔案即可。

阿里雲

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

清華

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