- 中国开源软件中心更新服务器（北京光环新网
服务器），包含其他开源镜像：
deb http://mirrors.oss.org.cn/ubuntu/ vivid main restricted universe multiverse deb http://mirrors.oss.org.cn/ubuntu/ vivid-security main restricted universe multiverse deb http://mirrors.oss.org.cn/ubuntu/ vivid-updates main restricted universe multiverse deb http://mirrors.oss.org.cn/ubuntu/ vivid-proposed main restricted universe multiverse deb http://mirrors.oss.org.cn/ubuntu/ vivid-backports main restricted universe multiverse deb-src http://mirrors.oss.org.cn/ubuntu/ vivid main restricted universe multiverse deb-src http://mirrors.oss.org.cn/ubuntu/ vivid-security main restricted universe multiverse deb-src http://mirrors.oss.org.cn/ubuntu/ vivid-updates main restricted universe multiverse deb-src http://mirrors.oss.org.cn/ubuntu/ vivid-proposed main restricted universe multiverse deb-src http://mirrors.oss.org.cn/ubuntu/ vivid-backports main restricted universe multiverse
- 阿里云更新服务器（北京万网/浙江杭州阿里云服务器双线接入），包含其他开源镜像：
deb http://mirrors.aliyun.com/ubuntu/ vivid main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ vivid-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ vivid-updates main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ vivid-proposed main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ vivid-backports main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ vivid main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ vivid-security main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ vivid-updates main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ vivid-proposed main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ vivid-backports main restricted universe multiverse
- 搜狐更新服务器（山东联通千兆接入，官方中国大陆地区镜像跳转至此） ，包含其他开源镜像：
deb http://mirrors.sohu.com/ubuntu/ vivid main restricted universe multiverse deb http://mirrors.sohu.com/ubuntu/ vivid-security main restricted universe multiverse deb http://mirrors.sohu.com/ubuntu/ vivid-updates main restricted universe multiverse deb http://mirrors.sohu.com/ubuntu/ vivid-proposed main restricted universe multiverse deb http://mirrors.sohu.com/ubuntu/ vivid-backports main restricted universe multiverse deb-src http://mirrors.sohu.com/ubuntu/ vivid main restricted universe multiverse deb-src http://mirrors.sohu.com/ubuntu/ vivid-security main restricted universe multiverse deb-src http://mirrors.sohu.com/ubuntu/ vivid-updates main restricted universe multiverse deb-src http://mirrors.sohu.com/ubuntu/ vivid-proposed main restricted universe multiverse deb-src http://mirrors.sohu.com/ubuntu/ vivid-backports main restricted universe multiverse
- 网易163更新服务器（广东广州电信/联通千兆双线接入），包含其他开源镜像：
deb http://mirrors.163.com/ubuntu/ vivid main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ vivid-security main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ vivid-updates main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ vivid-proposed main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ vivid-backports main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ vivid main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ vivid-security main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ vivid-updates main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ vivid-proposed main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ vivid-backports main restricted universe multiverse
加入如下内容（中科大的）：
deb http://mirrors.ustc.edu.cn/ubuntu/ precise-updates main restricted
deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-updates main restricted
deb http://mirrors.ustc.edu.cn/ubuntu/ precise universe
deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise universe
deb http://mirrors.ustc.edu.cn/ubuntu/ precise-updates universe
deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-updates universe
deb http://mirrors.ustc.edu.cn/ubuntu/ precise multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ precise-updates multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-updates multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
比较快的源：
搜狐源：
deb http://mirrors.sohu.com/ubuntu/ precise-updates main restricted
deb-src http://mirrors.sohu.com/ubuntu/ precise-updates main restricted
deb http://mirrors.sohu.com/ubuntu/ precise universe
deb-src http://mirrors.sohu.com/ubuntu/ precise universe
deb http://mirrors.sohu.com/ubuntu/ precise-updates universe
deb-src http://mirrors.sohu.com/ubuntu/ precise-updates universe
deb http://mirrors.sohu.com/ubuntu/ precise multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise multiverse
deb http://mirrors.sohu.com/ubuntu/ precise-updates multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise-updates multiverse
deb http://mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiverse
网易源：
deb http://mirrors.163.com/ubuntu/ precise-updates main restricted
deb-src http://mirrors.163.com/ubuntu/ precise-updates main restricted
deb http://mirrors.163.com/ubuntu/ precise universe
deb-src http://mirrors.163.com/ubuntu/ precise universe
deb http://mirrors.163.com/ubuntu/ precise-updates universe
deb-src http://mirrors.163.com/ubuntu/ precise-updates universe
deb http://mirrors.163.com/ubuntu/ precise multiverse
deb-src http://mirrors.163.com/ubuntu/ precise multiverse
deb http://mirrors.163.com/ubuntu/ precise-updates multiverse
deb-src http://mirrors.163.com/ubuntu/ precise-updates multiverse
deb http://mirrors.163.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ precise-backports main restricted universe multiverse
更新看看速度：
sudo apt-get update
sudo apt-get upgrade