sudo nano /etc/apt/sources.list
# 编辑 `/etc/apt/sources.list` 文件，删除原文件所有内容，用以下内容取代： # 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/debian/ buster main contrib non-free # deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ buster main contrib non-free deb https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-updates main contrib non-free # deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-updates main contrib non-free deb https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-backports main contrib non-free # deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ buster-backports main contrib non-free deb https://mirrors.tuna.tsinghua.edu.cn/debian-security buster/updates main contrib non-free # deb-src https://mirrors.tuna.tsinghua.edu.cn/debian-security buster/updates main contrib non-free
sudo nano /etc/apt/sources.list.d/raspi.list
# 编辑 `/etc/apt/sources.list.d/raspi.list` 文件，删除原文件所有内容，用以下内容取代： deb http://mirrors.tuna.tsinghua.edu.cn/raspberrypi/ buster main ui
编辑镜像站后，请使用sudo apt-get update命令，更新软件源列表，同时检查您的编辑是否正确。