众所周知，因为一些不可抗因素，树莓派在更新时需要切换到国内镜像源来方便进行操作

默认源

我们可以使用以下命令打开源配置文件

sudo nano /etc/apt/sources.list

之后可以看到如下信息

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

有的情况下还需要修改另一个配置（大多数情况下不修改也可以）

sduo nano /etc/apt/sources.list.d/raspi.list

可以看到如下信息

deb http://archive.raspberrypi.com/debian/ bookworm main
# Uncomment line below then 'apt-get update' to enable 'apt-get source'
#deb-src http://archive.raspberrypi.com/debian/ bookworm main

国内源

我们只需要修改第一个配置文件，修改为阿里云的源（实测这个源比较完整，更新比较及时）

deb https://mirrors.aliyun.com/debian/ bookworm main non-free non-free-firmware contrib
deb-src https://mirrors.aliyun.com/debian/ bookworm main non-free non-free-firmware contrib
deb https://mirrors.aliyun.com/debian-security/ bookworm-security main
deb-src https://mirrors.aliyun.com/debian-security/ bookworm-security main
deb https://mirrors.aliyun.com/debian/ bookworm-updates main non-free non-free-firmware contrib
deb-src https://mirrors.aliyun.com/debian/ bookworm-updates main non-free non-free-firmware contrib
deb https://mirrors.aliyun.com/debian/ bookworm-backports main non-free non-free-firmware contrib
deb-src https://mirrors.aliyun.com/debian/ bookworm-backports main non-free non-free-firmware contrib

之后执行

sudo apt-get update
sudo apt-get upgrade

即可更新升级树莓派

安装软件也会比之前使用默认源要快不少，基本上能跑满带宽