Raspberry Pi OS (64-bit) (bullseye)更换清华源

System: 64-bit
Debian version: 11 (bullseye)
本文仅针对64位Raspberry Pi OS

官方源

/etc/apt/sources.list

deb http://deb.debian.org/debian bullseye main contrib non-free
deb http://security.debian.org/debian-security bullseye-security main contrib non-free
deb http://deb.debian.org/debian bullseye-updates main contrib non-free
# Uncomment deb-src lines below then 'apt-get update' to enable 'apt-get source'
#deb-src http://deb.debian.org/debian bullseye main contrib non-free
#deb-src http://security.debian.org/debian-security bullseye-security main contrib non-free
#deb-src http://deb.debian.org/debian bullseye-updates main contrib non-free

/