ubuntu更新软件下载资源源

第一步：备份源列表：sudo  cp /etc/apt/sources.list /etc/apt/sources.list.backup(备份当前源列表)第二步：修改更新源：sudo vi /etc/apt/sources.list第三部：替换源：<1>.来自163网

deb http://mirrors.163.com/ubuntu/ precise main restricted

deb-src http://mirrors.163.com/ubuntu/ precise main restricted

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

deb http://mirrors.163.com/ubuntu/ precise-security main restricted

deb-src http://mirrors.163.com/ubuntu/ precise-security main restricted

deb http://mirrors.163.com/ubuntu/ precise-security universe

deb-src http://mirrors.163.com/ubuntu/ precise-security universe

deb http://mirrors.163.com/ubuntu/ precise-security multiverse

deb-src http://mirrors.163.com/ubuntu/ precise-security multiverse

deb http://extras.ubuntu.com/ubuntu precise main

deb-src http://extras.ubuntu.com/ubuntu precise main

<2>来自sohu

deb http://mirrors.sohu.com/ubuntu/ precise main restricted

deb-src http://mirrors.sohu.com/ubuntu/ precise main restricted

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

deb http://mirrors.sohu.com/ubuntu/ precise-security main restricted

deb-src http://mirrors.sohu.com/ubuntu/ precise-security main restricted

deb http://mirrors.sohu.com/ubuntu/ precise-security universe

deb-src http://mirrors.sohu.com/ubuntu/ precise-security universe

deb http://mirrors.sohu.com/ubuntu/ precise-security multiverse

deb-src http://mirrors.sohu.com/ubuntu/ precise-security multiverse

deb http://extras.ubuntu.com/ubuntu precise main

deb-src http://extras.ubuntu.com/ubuntu precise main

<3>来自ubunu的推荐

deb http://ubuntu.cn99.com/ubuntu/ precise main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ precise-updates main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ precise-security main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ precise-backports main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu-cn/ precise main restricted universe multiverse

<4>来自电子科技大学

deb http://ubuntu.uestc.edu.cn/ubuntu/ precise main restricted universe multiverse

deb http://ubuntu.uestc.edu.cn/ubuntu/ precise-backports main restricted universe multiverse

deb http://ubuntu.uestc.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

deb http://ubuntu.uestc.edu.cn/ubuntu/ precise-security main restricted universe multiverse

deb http://ubuntu.uestc.edu.cn/ubuntu/ precise-updates main restricted universe multiverse

deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise main restricted universe multiverse

deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise-backports main restricted universe multiverse

deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise-security main restricted universe multiverse

deb-src http://ubuntu.uestc.edu.cn/ubuntu/ precise-updates main restricted universe multiverse

<5>来自中国科技大学

deb http://debian.ustc.edu.cn/ubuntu/ precise main restricted universe multiverse

deb http://debian.ustc.edu.cn/ubuntu/ precise-backports restricted universe multiverse

deb http://debian.ustc.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

deb http://debian.ustc.edu.cn/ubuntu/ precise-security main restricted universe multiverse

deb http://debian.ustc.edu.cn/ubuntu/ precise-updates main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ precise main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ precise-backports main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ precise-security main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ precise-updates main restricted universe multiverse

<6>来自北京交通大学

deb http://mirror.bjtu.edu.cn/ubuntu/ precise main multiverse restricted universe

deb http://mirror.bjtu.edu.cn/ubuntu/ precise-backports main multiverse restricted universe

deb http://mirror.bjtu.edu.cn/ubuntu/ precise-proposed main multiverse restricted universe

deb http://mirror.bjtu.edu.cn/ubuntu/ precise-security main multiverse restricted universe

deb http://mirror.bjtu.edu.cn/ubuntu/ precise-updates main multiverse restricted universe

最后一步

更新列表：sudo apt-get update