N1刷armbian更新apt，有的源里缺少很多东西，尤其是阿里华为这种源，arm架构的却少了很多，谨慎换源！！！
nano /etc/apt/sources.list
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deb http://mirrors.ustc.edu.cn/debian stretch main contrib non-free
deb http://mirrors.ustc.edu.cn/debian stretch-updates main contrib non-free
deb http://mirrors.ustc.edu.cn/debian stretch-backports main contrib non-free
deb http://mirrors.ustc.edu.cn/debian-security/ stretch/updates main contrib non-free
apt-get update