ubuntu更换国内源

下面是更换为清华源
sudo apt-get -y install apt-transport-https ca-certificates curl software-properties-common
sudo sed -i "s@http://.*archive.ubuntu.com@https://mirrors.tuna.tsinghua.edu.cn@g" /etc/apt/sources.list
sudo sed -i "s@http://.*security.ubuntu.com@https://mirrors.tuna.tsinghua.edu.cn@g" /etc/apt/sources.list