保存原有配置
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
vim /etc/apt/sources.list
image.png
查看属于哪个版本，然后替换源(这个是阿里的源)
deb http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ stretch main contrib non-free rpi
deb-src http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ stretch main contrib non-free rpi
删除从新构建
sudo cp /etc/apt/sources.list.d/raspi.list /etc/apt/sources.list.d/raspi.list.bak
sudo rm /etc/apt/sources.list.d/raspi.list
sudo apt-get update
sudo apt-get update && apt-get upgrade -y
