Some of the built-in sources are blocked by the GFW, and installation can cause downloads.

So we have to switch him to a domestic source. Modify the /etc/apt/sources.list file:

sudo nano /etc/apt/sources.list

Comment out the first line and add at the end:

deb http://mirrors.ustc.edu.cn/raspbian/raspbian/ jessie main contrib non-free rpi

Modify the /etc/apt/sources.list.d/raspi.list file:

sudo nano /etc/apt/sources.list.d/raspi.list

Comment out the first line and add at the end:

deb http://mirrors.ustc.edu.cn/archive.raspberrypi.org/debian/ jessie main ui

Update the software index:

sudo apt-get update

Compare index list update dependencies

Sudo apt-get upgrade -y