1. systemctl start ssh # 启动 ssh
    2. systemctl enable ssh # 开机启动 ssh

    https://www.dinofizzotti.com/blog/2019-01-09-running-a-man-in-the-middle-proxy-on-a-raspberry-pi-3/
    http://www.0x77.com/2018/04/03/wifi/

    https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md

    https://www.cyberciti.biz/faq/linux-iptables-delete-prerouting-rule-command/

    https://www.cnblogs.com/ahuo/p/10943654.html

    1. https://www.jianshu.com/p/abb1d797d1f3
    3. apt-get install -y libffi-dev python-dev libevent-dev

    https://www.jianshu.com/p/032eb87aa7e0

    旋转屏幕
    https://blog.csdn.net/IOT_Flower/article/details/72730034

    ====
    ubuntu mate ssh failed

    1. https://raspberrypi.stackexchange.com/questions/60234/pi3-ssh-connection-closed

    apt install linux-headers-4.15.0-1032-raspi2