Raspberry Pi replaces domestic source (Tsinghua source)

• Model: Raspberry Pi 3B+
• System: Raspberry Pi OS(64 bit) beta

1. Back up source files

• ssh to connect to the Raspberry Pi, back up the source files  sources.list  and  raspi.list

$ sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
$ sudo cp /etc/apt/sources.list.d/raspi.list /etc/apt/sources.list.d/raspi.list.bak

2. Modify the source file

• Since the raspberry source does not fully support the 64-bit Pi OS, the  sources.list needs to use the debian source, while the 32-bit source can be directly used by the raspberry source.

32nd Pi OS

• Modify the  sources.list  file, delete all the contents in it, and replace it with the following contents ( Ctrl + O to  save the file, Enter to  confirm, Ctrl + X to  exit):

$ 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

• Modify the  raspi.list  file and replace it with the following content:

$ sudo nano /etc/apt/sources.list.d/raspi.list
deb http://mirrors.tuna.tsinghua.edu.cn/raspberrypi/ buster main ui

64th Pi OS

• Modify the  sources.list  file and replace it with the following:

$ 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

• Modify the  raspi.list  file and replace it with the following content (the source separately provided by the Raspberry Pi Foundation, consistent with the 32-bit Pi OS):

$ sudo nano /etc/apt/sources.list.d/raspi.list
deb http://mirrors.tuna.tsinghua.edu.cn/raspberrypi/ buster main ui

3. Synchronize update source and software package

• Execute the following commands:

$ sudo apt-get update
$ sudo apt-get upgrade