Ubuntu 14.04deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty main restricted universe multiversedeb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty main restricted universe multiversede
Ubuntu 14.04deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty main restricted universe multiversedeb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ trusty main restricted universe multiversede