0 Ubuntu 8.04国内源，已测试速度可达80K左右！（附修改方法）

1、修改软件源
修改之前先备份，以防万一:sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup
修改软件源：sudo gedit /etc/apt/sources.list
把内容清空，换上速度快的源。推荐Mirror.lupaworld.com更新服务器（浙江省杭州市双线服务器）（雅安电信10MADSL下载500多K）
把以下内容复制到进去，保存文件。
deb http://mirror.lupaworld.com/ubuntu hardy main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu hardy-security main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu hardy-updates main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu hardy-backports main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu hardy-proposed main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu hardy main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu hardy-security main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu hardy-updates main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu hardy-backports main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu hardy-proposed main restricted universe multiverse

2、更新列表
执行:sudo apt-get update