现在本人为大家送上我一直在用的Ubuntu 8.04的更新源吧！
sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup （备份下当前的源列表，有备无患嘛.）
sudo gedit /etc/apt/sources.list （打开Ubuntu 8.04源列表文件）
在打开的文件的尾部空上一行把下面的源地址粘贴上去保存就OK了.
Ubuntu 8.04#cn99.com 源更新服务器（江苏省常州市电信，推荐电信用户使用，我自己是南方电信1M带宽的用户，更新速度平均有100K）：
deb hardy main restricted universe multiverse
deb-src hardy main restricted universe multiverse
deb hardy-backports main restricted universe multiverse
deb-src hardy-backports main restricted universe multiverse
deb hardy-proposed main restricted universe multiverse
deb-src hardy-proposed main restricted universe multiverse
deb hardy-security main restricted universe multiverse
deb-src hardy-security main restricted universe multiverse
deb hardy-updates main restricted universe multiverse
deb-src hardy-updates main restricted universe multiverse
#Ubuntu 8.04 Hardy Heron
deb hardy main restricted universe multiverse
deb hardy-backports main restricted universe multiverse
deb hardy-proposed main restricted universe multiverse
deb hardy-security main restricted universe multiverse
deb hardy-updates main restricted universe multiverse
deb-src hardy main restricted universe multiverse
deb-src hardy-backports main restricted universe multiverse
deb-src hardy-proposed main restricted universe multiverse
deb-src hardy-security main restricted universe multiverse
deb-src hardy-updates main restricted universe multiverse
我一直在用的，速度还不错哦，我的1M的ADSL的速度都有100-120KB的速度的。