Armbian清華大学のソースを交換


修正するリストファイルsudo nano /etc/apt/sources.list
公式ソースの前に#号注釈を付け、一番下に清華大学ソースリストを付ける
清華大学の源
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ stretch main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ stretch main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ stretch-updates main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ stretch-updates main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ stretch-backports main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ stretch-backports main contrib non-free
deb https://mirrors.tuna.tsinghua.edu.cn/debian-security/ stretch/updates main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian-security/ stretch/updates main contrib non-free

更新sudo apt update sudo apt upgrade