cp /etc/apt/sources.list /etc/apt/sources.list.bak echo "deb http://mirrors.163.com/debian/ jessie main non-free contrib deb http://mirrors.163.com/debian/ jessie-proposed-updates main non-free contrib deb-src http://mirrors.163.com/debian/ jessie main non-free contrib deb-src http://mirrors.163.com/debian/ jessie-proposed-updates main non-free contrib" >/etc/apt/sources.list apt-get update echo deb http://archive.ubuntu.com/ubuntu/trusty main universe restricted multiverse >> /etc/apt/sources.list