1、32位树莓派清华源
$ sudo nano /etc/apt/sources.list
deb http://mirrors.tuna.tsinghua.edu.cn/raspberry-pi-os/raspbian/ buster main non-free contrib rpi
deb-src http://mirrors.tuna.tsinghua.edu.cn/raspberry-pi-os/raspbian/ buster main non-free contrib rpi
$ sudo nano /etc/apt/sources.list.d/raspi.list
deb http://mirrors.tuna.tsinghua.edu.cn/raspberrypi/ buster main ui
2、64位树莓派清华源
$ sudo nano /etc/apt/sources.list
deb https://mirrors.tuna.tsinghua.edu.cn/debian buster main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian-security/ buster/updates main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian buster-updates main contrib non-free
$ sudo nano /etc/apt/sources.list.d/raspi.list
deb http://mirrors.tuna.tsinghua.edu.cn/raspberrypi/ buster main ui
3、更新软件
$ sudo apt-get update
$ sudo apt-get upgrade
