UOS更换源方法

更换软件源：
-新建源文件
sudo dedit /etc/apt/sources.list.d/deepin.list
-添加华为源
deb [trusted=yes] https://mirrors.huaweicloud.com/deepin stable main contrib non-free
#deb-src deb https://mirrors.huaweicloud.com/deepin stable main
-更新系统缓存
sudo apt-get update
-更新系统软件
sudo apt-get upgrade