1.手工修改源配置文件

sudo edit /etc/apt/sources.list

  2.添加如下

## Generated by deepin-installer
deb [by-hash=force] https://mirrors.tuna.tsinghua.edu.cn/deepin panda main contrib non-free

  3.刷新软件源列表，更新软件

sudo apt-get update
sudo apt-get upgrade