树莓派常用

无线网络配置：
https://shumeipai.nxez.com/2017/09/13/raspberry-pi-network-configuration-before-boot.html

E: Unable to correct problems, you have held broken packages.

https://www.cnblogs.com/aaron-agu/p/8862624.html

下载源

https://zhuanlan.zhihu.com/p/165100907