树莓派4b更换清华源

好久没用树莓派了.全是灰.打开一看还能正常运行.发现源都失效了.于是找到了清华镜像源
uname -m 查看自己的版本
# armv7l 用户：编辑 `/etc/apt/sources.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/raspbian/raspbian/ bullseye main non-free contrib rpi
# deb-src http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ bullseye main non-free contrib rpi

# armv7l 用户如果需要开启 multi-arch 使用 arm64 软件源，需要在 `/etc/apt/sources.list` 中加上
deb [arch=arm64] http://mirrors.tuna.tsinghua.edu.cn/raspbian/multiarch/ bullseye main

# aarch64 用户：编辑 `/etc/apt/sources.list` 文件，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/ bullseye main contrib non-free
# deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free
# deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free
# deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian-security bullseye-security main contrib non-free
# deb-src https://mirrors.tuna.tsinghua.edu.cn/debian-security bullseye-security main contrib non-free

# 对于两个架构，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/ bullseye main

可以到官网地址获取最新镜像源地址:https://mirrors.tuna.tsinghua.edu.cn/help/raspbian/