&">nbsp; Ubuntu Night( http://ubuntu9.com ) 的Top mirror功能根据当前的网络情况和源健康状况不断地进行更新当前可用的源的信息，包括了Top fast/near/stable mirror，可以找到当前网络上所有可用的Ubuntu 镜像（即源)，并按照平均下载速度和地理位置进行排名。而且，当你找到最适合你的源之后，还可以直接下载它的sources.list 文件，并可直接将它copy到/etc/apt/sources.list或者放在/etc/apt/souces.list.d目录下，非常的方便，无须苦苦找可用源。
不同的网络状况连接以下源的速度不同, 所以cn99并不一定是最快的源, 建议在添加前手动验证以下源的连接速度(ping下就行),比如说北京网通ADSL用户连接cn99就非常慢(Then what's the fastest source for Beijing Netcom? ),而ftp.sjtu.edu.cn是相对较快的源,选择最快的源可以节省大批下载时间。
1 首先备份源列表:
sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup
2 而后用gedit或其他编辑器打开:
gksu gedit /etc/apt/sources.list
kdesudo kate /etc/apt/sources.list
gksu mousepad /etc/apt/sources.list
gksu gedit /etc/apt/sources.list
3 从下面列表中选择合适的源，替换掉文件中所有的内容，保存编辑好的文件:
Ubuntu 10.04 source
Archive.ubuntu.com更新服务器（欧洲，此为官方源，电信网通用户使用)：
deb http://archive.ubuntu.com/ubuntu/ lucid main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ lucid-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ lucid-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ lucid-proposed main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ lucid-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ lucid main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ lucid-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ lucid-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ lucid-proposed main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ lucid-backports main restricted universe multiverse
骨头兄亲自搭建并维护这个Ubuntu源（该源位于浙江杭州百兆共享宽带的电信机房)：
deb http://ubuntu.srt.cn/ubuntu/ lucid main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ lucid-security main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ lucid-updates main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ lucid-proposed main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ lucid-backports main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ lucid main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ lucid-security main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ lucid-updates main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ lucid-proposed main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ lucid-backports main restricted universe multiverse
网易163更新服务器：
deb http://mirrors.163.com/ubuntu/ lucid main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ lucid-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ lucid-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ lucid-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ lucid-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ lucid main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ lucid-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ lucid-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ lucid-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ lucid-backports main restricted universe multiverse
sohu 更新服务器：
deb http://mirrors.sohu.com/ubuntu/ lucid main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ lucid-security main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ lucid-updates main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ lucid-proposed main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ lucid-backports main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ lucid main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ lucid-security main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ lucid-updates main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ lucid-proposed main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ lucid-backports main restricted universe multiverse
Mirrors.shlug.org更新服务器（电信服务器，Ubuntu China Official Mirror, maintained by Shanghai Linux User Group）：
deb http://cn.archive.ubuntu.com/ubuntu lucid main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu lucid-security main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu lucid-updates main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu lucid-backports main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu lucid-proposed main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu lucid main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu lucid-security main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu lucid-updates main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu lucid-backports main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu lucid-proposed main restricted universe multiverse
Mirror.lupaworld.com更新服务器（浙江省杭州市双线服务器）：
deb http://mirror.lupaworld.com/ubuntu lucid main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu lucid-security main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu lucid-updates main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu lucid-backports main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu lucid-proposed main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu lucid main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu lucid-security main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu lucid-updates main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu lucid-backports main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu lucid-proposed main restricted universe multiverse
厦门大学更新服务器（教育网服务器）：
deb ftp://ubuntu.realss.cn/ubuntu/ lucid main restricted universe multiverse
deb ftp://ubuntu.realss.cn/ubuntu/ lucid-backports restricted universe multiverse
deb ftp://ubuntu.realss.cn/ubuntu/ lucid-proposed main restricted universe multiverse
deb ftp://ubuntu.realss.cn/ubuntu/ lucid-security main restricted universe multiverse
deb ftp://ubuntu.realss.cn/ubuntu/ lucid-updates main restricted universe multiverse
deb-src ftp://ubuntu.realss.cn/ubuntu/ lucid main restricted universe multiverse
deb-src ftp://ubuntu.realss.cn/ubuntu/ lucid-backports main restricted universe multiverse
deb-src ftp://ubuntu.realss.cn/ubuntu/ lucid-proposed main restricted universe multiverse
deb-src ftp://ubuntu.realss.cn/ubuntu/ lucid-security main restricted universe multiverse
deb-src ftp://ubuntu.realss.cn/ubuntu/ lucid-updates main restricted universe multiverse
成都市 电子科技大学更新服务器（教育网，推荐校园网和网通用户使用）：
deb http://ubuntu.uestc.edu.cn/ubuntu/ lucid main multiverse restricted universe
deb http://ubuntu.uestc.edu.cn/ubuntu/ lucid-backports main multiverse restricted universe
deb http://ubuntu.uestc.edu.cn/ubuntu/ lucid-proposed main multiverse restricted universe
deb http://ubuntu.uestc.edu.cn/ubuntu/ lucid-security main multiverse restricted universe
deb http://ubuntu.uestc.edu.cn/ubuntu/ lucid-updates main multiverse restricted universe
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ lucid main multiverse restricted universe
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ lucid-backports main multiverse restricted universe
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ lucid-proposed main multiverse restricted universe
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ lucid-security main multiverse restricted universe
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ lucid-updates main multiverse restricted universe
== 如果无法解析uestc.edu.cn域名，请使用以下地址 ==
deb http://ubuntu.dormforce.net/ubuntu/ lucid main multiverse restricted universe
deb http://ubuntu.dormforce.net/ubuntu/ lucid-backports main multiverse restricted universe
deb http://ubuntu.dormforce.net/ubuntu/ lucid-proposed main multiverse restricted universe
deb http://ubuntu.dormforce.net/ubuntu/ lucid-security main multiverse restricted universe
deb http://ubuntu.dormforce.net/ubuntu/ lucid-updates main multiverse restricted universe
deb-src http://ubuntu.dormforce.net/ubuntu/ lucid main multiverse restricted universe
deb-src http://ubuntu.dormforce.net/ubuntu/ lucid-backports main multiverse restricted universe
deb-src http://ubuntu.dormforce.net/ubuntu/ lucid-proposed main multiverse restricted universe
deb-src http://ubuntu.dormforce.net/ubuntu/ lucid-security main multiverse restricted universe
deb-src http://ubuntu.dormforce.net/ubuntu/ lucid-updates main multiverse restricted universe