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ubuntu用户都清楚，更新下载速度超慢，但是你可以配置国内的镜像源，就可以将速度提升至几百K。废话不多说。
首先，备份一下ubuntu 12.10 原来的源地址列表文件
sudo cp /etc/apt/sources.list /etc/apt/sources.list.old然后进行修改
sudo gedit /etc/apt/sources.list可以在里面添加资源地址，我是直接覆盖掉原来的。 下面是网上找到的一些较好的源，有大型网站的，也有教育网的，可以根据自己的情况添加两三个即可。 #网易的源（163源，无论是不是教育网，速度都很快） deb http://mirrors.163.com/ubuntu/ quantal main universe restricted multiverse deb-src http://mirrors.163.com/ubuntu/ quantal main universe restricted multiverse deb http://mirrors.163.com/ubuntu/ quantal-security universe main multiverse restricted deb-src http://mirrors.163.com/ubuntu/ quantal-security universe main multiverse restricted deb http://mirrors.163.com/ubuntu/ quantal-updates universe main multiverse restricted deb http://mirrors.163.com/ubuntu/ quantal-proposed universe main multiverse restricted deb-src http://mirrors.163.com/ubuntu/ quantal-proposed universe main multiverse restricted deb http://mirrors.163.com/ubuntu/ quantal-backports universe main multiverse restricted deb-src http://mirrors.163.com/ubuntu/ quantal-backports universe main multiverse restricted deb-src http://mirrors.163.com/ubuntu/ quantal-updates universe main multiverse restricted #搜狐的源（sohu 源今天还没有更新，不过应该快了） deb http://mirrors.sohu.com/ubuntu/ quantal main restricted deb-src http://mirrors.sohu.com/ubuntu/ quantal main restricted deb http://mirrors.sohu.com/ubuntu/ quantal-updates main restricted deb-src http://mirrors.sohu.com/ubuntu/ quantal-updates main restricted deb http://mirrors.sohu.com/ubuntu/ quantal universe deb-src http://mirrors.sohu.com/ubuntu/ quantal universe deb http://mirrors.sohu.com/ubuntu/ quantal-updates universe deb-src http://mirrors.sohu.com/ubuntu/ quantal-updates universe deb http://mirrors.sohu.com/ubuntu/ quantal multiverse deb-src http://mirrors.sohu.com/ubuntu/ quantal multiverse deb http://mirrors.sohu.com/ubuntu/ quantal-updates multiverse deb-src http://mirrors.sohu.com/ubuntu/ quantal-updates multiverse deb http://mirrors.sohu.com/ubuntu/ quantal-backports main restricted universe multiverse deb-src http://mirrors.sohu.com/ubuntu/ quantal-backports main restricted universe multiverse deb http://mirrors.sohu.com/ubuntu/ quantal-security main restricted deb-src http://mirrors.sohu.com/ubuntu/ quantal-security main restricted deb http://mirrors.sohu.com/ubuntu/ quantal-security universe deb-src http://mirrors.sohu.com/ubuntu/ quantal-security universe deb http://mirrors.sohu.com/ubuntu/ quantal-security multiverse deb-src http://mirrors.sohu.com/ubuntu/ quantal-security multiverse deb http://extras.ubuntu.com/ubuntu quantal main deb-src http://extras.ubuntu.com/ubuntu quantal main #台湾源（台湾的ubuntu 更新源还是很给力的） deb http://tw.archive.ubuntu.com/ubuntu/ quantal main universe restricted multiverse deb-src http://tw.archive.ubuntu.com/ubuntu/ quantal main universe restricted multiverse deb http://tw.archive.ubuntu.com/ubuntu/ quantal-security universe main multiverse restricted deb-src http://tw.archive.ubuntu.com/ubuntu/ quantal-security universe main multiverse restricted deb http://tw.archive.ubuntu.com/ubuntu/ quantal-updates universe main multiverse restricted deb-src http://tw.archive.ubuntu.com/ubuntu/ quantal-updates universe main multiverse restricted #骨头源，骨头源是bones7456架设的一个Ubuntu源 ，提供ubuntu,deepin deb http://ubuntu.srt.cn/ubuntu/ quantal main universe restricted multiverse deb-src http://ubuntu.srt.cn/ubuntu/ quantal main universe restricted multiverse deb http://ubuntu.srt.cn/ubuntu/ quantal-security universe main multiverse restricted deb-src http://ubuntu.srt.cn/ubuntu/ quantal-security universe main multiverse restricted deb http://ubuntu.srt.cn/ubuntu/ quantal-updates universe main multiverse restricted deb http://ubuntu.srt.cn/ubuntu/ quantal-proposed universe main multiverse restricted deb-src http://ubuntu.srt.cn/ubuntu/ quantal-proposed universe main multiverse restricted deb http://ubuntu.srt.cn/ubuntu/ quantal-backports universe main multiverse restricted deb-src http://ubuntu.srt.cn/ubuntu/ quantal-backports universe main multiverse restricted deb-src http://ubuntu.srt.cn/ubuntu/ quantal-updates universe main multiverse restricted #mirror.lupaworld.com的源，速度很快 deb http://mirror.lupaworld.com/ubuntu/archive/ quantal main restricted universe multiverse deb http://mirror.lupaworld.com/ubuntu/archive/ quantal-security main restricted universe multiverse deb http://mirror.lupaworld.com/ubuntu/archive/ quantal-updates main restricted universe multiverse deb http://mirror.lupaworld.com/ubuntu/archive/ quantal-backports main restricted universe multiverse deb http://mirror.lupaworld.com/ubuntu/ubuntu-cn/ quantal main restricted universe multiverse #ubuntu.cn99.com源（推荐）: deb http://ubuntu.cn99.com/ubuntu/ quantal main restricted universe multiverse deb http://ubuntu.cn99.com/ubuntu/ quantal-updates main restricted universe multiverse deb http://ubuntu.cn99.com/ubuntu/ quantal-security main restricted universe multiverse deb http://ubuntu.cn99.com/ubuntu/ quantal-backports main restricted universe multiverse deb http://ubuntu.cn99.com/ubuntu-cn/ quantal main restricted universe multiverse #教育网源 #电子科技大学 deb http://ubuntu.uestc.edu.cn/ubuntu/ quantal main restricted universe multiverse deb http://ubuntu.uestc.edu.cn/ubuntu/ quantal-backports main restricted universe multiverse deb http://ubuntu.uestc.edu.cn/ubuntu/ quantal-proposed main restricted universe multiverse deb http://ubuntu.uestc.edu.cn/ubuntu/ quantal-security main restricted universe multiverse deb http://ubuntu.uestc.edu.cn/ubuntu/ quantal-updates main restricted universe multiverse deb-src http://ubuntu.uestc.edu.cn/ubuntu/ quantal main restricted universe multiverse deb-src http://ubuntu.uestc.edu.cn/ubuntu/ quantal-backports main restricted universe multiverse deb-src http://ubuntu.uestc.edu.cn/ubuntu/ quantal-proposed main restricted universe multiverse deb-src http://ubuntu.uestc.edu.cn/ubuntu/ quantal-security main restricted universe multiverse deb-src http://ubuntu.uestc.edu.cn/ubuntu/ quantal-updates main restricted universe multiverse #中国科技大学 deb http://debian.ustc.edu.cn/ubuntu/ quantal main restricted universe multiverse deb http://debian.ustc.edu.cn/ubuntu/ quantal-backports restricted universe multiverse deb http://debian.ustc.edu.cn/ubuntu/ quantal-proposed main restricted universe multiverse deb http://debian.ustc.edu.cn/ubuntu/ quantal-security main restricted universe multiverse deb http://debian.ustc.edu.cn/ubuntu/ quantal-updates main restricted universe multiverse deb-src http://debian.ustc.edu.cn/ubuntu/ quantal main restricted universe multiverse deb-src http://debian.ustc.edu.cn/ubuntu/ quantal-backports main restricted universe multiverse deb-src http://debian.ustc.edu.cn/ubuntu/ quantal-proposed main restricted universe multiverse deb-src http://debian.ustc.edu.cn/ubuntu/ quantal-security main restricted universe multiverse deb-src http://debian.ustc.edu.cn/ubuntu/ quantal-updates main restricted universe multiverse #北京理工大学 deb http://mirror.bjtu.edu.cn/ubuntu/ quantal main multiverse restricted universe deb http://mirror.bjtu.edu.cn/ubuntu/ quantal-backports main multiverse restricted universe deb http://mirror.bjtu.edu.cn/ubuntu/ quantal-proposed main multiverse restricted universe deb http://mirror.bjtu.edu.cn/ubuntu/ quantal-security main multiverse restricted universe deb http://mirror.bjtu.edu.cn/ubuntu/ quantal-updates main multiverse restricted universe deb-src http://mirror.bjtu.edu.cn/ubuntu/ quantal main multiverse restricted universe deb-src http://mirror.bjtu.edu.cn/ubuntu/ quantal-backports main multiverse restricted universe deb-src http://mirror.bjtu.edu.cn/ubuntu/ quantal-proposed main multiverse restricted universe deb-src http://mirror.bjtu.edu.cn/ubuntu/ quantal-security main multiverse restricted universe deb-src http://mirror.bjtu.edu.cn/ubuntu/ quantal-updates main multiverse restricted universe #兰州大学 deb ftp://mirror.lzu.edu.cn/ubuntu/ quantal main multiverse restricted universe deb ftp://mirror.lzu.edu.cn/ubuntu/ quantal-backports main multiverse restricted universe deb ftp://mirror.lzu.edu.cn/ubuntu/ quantal-proposed main multiverse restricted universe deb ftp://mirror.lzu.edu.cn/ubuntu/ quantal-security main multiverse restricted universe deb ftp://mirror.lzu.edu.cn/ubuntu/ quantal-updates main multiverse restricted universe deb ftp://mirror.lzu.edu.cn/ubuntu-cn/ quantal main multiverse restricted universe #上海交通大学（上海交大源，教育网的速度不用说了） deb http://ftp.sjtu.edu.cn/ubuntu/ quantal main multiverse restricted universe deb http://ftp.sjtu.edu.cn/ubuntu/ quantal-backports main multiverse restricted universe deb http://ftp.sjtu.edu.cn/ubuntu/ quantal-proposed main multiverse restricted universe deb http://ftp.sjtu.edu.cn/ubuntu/ quantal-security main multiverse restricted universe deb http://ftp.sjtu.edu.cn/ubuntu/ quantal-updates main multiverse restricted universe deb http://ftp.sjtu.edu.cn/ubuntu-cn/ quantal main multiverse restricted universe deb-src http://ftp.sjtu.edu.cn/ubuntu/ quantal main multiverse restricted universe deb-src http://ftp.sjtu.edu.cn/ubuntu/ quantal-backports main multiverse restricted universe deb-src http://ftp.sjtu.edu.cn/ubuntu/ quantal-proposed main multiverse restricted universe deb-src http://ftp.sjtu.edu.cn/ubuntu/ quantal-security main multiverse restricted universe deb-src http://ftp.sjtu.edu.cn/ubuntu/ quantal-updates main multiverse restricted universe 添加好后保存，再输入 sudo apt-get update 就可以更新了，等着慢慢下载东西吧。
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