先备份

sudo mv /etc/apt/sources.list /etc/apt/sources.list.bak

编辑配置文件

sudo nano /etc/apt/sources.list

清华大学镜像地址

# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
# deb-src http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse

# 预发布软件源，不建议启用
# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
# # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse

中科大镜像

# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ jammy main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse

# deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
# # deb-src https://mirrors.ustc.edu.cn/ubuntu/ jammy-security main restricted universe multiverse

# 预发布软件源，不建议启用
# deb https://mirrors.ustc.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
# # deb-src https://mirrors.ustc.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse

阿里云镜像

# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
deb https://mirrors.aliyun.com/ubuntu/ jammy main restricted universe multiverse
# deb-src https://mirrors.aliyun.com/ubuntu/ jammy main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu/ jammy-updates main restricted universe multiverse
# deb-src https://mirrors.aliyun.com/ubuntu/ jammy-updates main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu/ jammy-backports main restricted universe multiverse
# deb-src https://mirrors.aliyun.com/ubuntu/ jammy-backports main restricted universe multiverse

# deb https://mirrors.aliyun.com/ubuntu/ jammy-security main restricted universe multiverse
# # deb-src https://mirrors.aliyun.com/ubuntu/ jammy-security main restricted universe multiverse

# 预发布软件源，不建议启用
# deb https://mirrors.aliyun.com/ubuntu/ jammy-proposed main restricted universe multiverse
# # deb-src https://mirrors.aliyun.com/ubuntu/ jammy-proposed main restricted universe multiverse

保存，更新

sudo apt update

写一键脚本

写一个脚本：switch-mirror-cn.txt

#!/bin/bash
# 
# 1. 先备份原 sources.list
echo "正在备份原软件源..."
sudo mv /etc/apt/sources.list /etc/apt/sources.list.bak

# 2. 直接写入清华源（无交互，无需nano）
echo "正在写入清华大学镜像源..."
sudo bash -c 'cat > /etc/apt/sources.list << EOF
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
EOF'

# 3. 更新软件源
echo "正在更新 apt 软件源..."
sudo apt update -y

echo -e "\n✅ 切换 Ubuntu 22.04 清华源完成！"

调用一键脚本

curl -fsSL https://543d.cn/upload/switch-mirror-cn.txt | bash

switch-mirror-cn.txt