树莓派 换全部源

• /etc/apt/sources.list
  sudo sed -i 's/deb.debian.org/mirrors.ustc.edu.cn/g' /etc/apt/sources.list
  (就是debian arm 源)

• security.debian.org
  sudo sed -i 's/:\/\/security.debian.org\/debian-security/:\/\/mirrors.ustc.edu.cn\/debian-security/g' /etc/apt/sources.list

• archive.raspberrypi.org
  sudo sed -i 's/:\/\/archive.raspberrypi.org/:\/\/mirrors.ustc.edu.cn/archive.raspberrypi.org/g' /etc/apt/sources.list.d/raspi.list