deb http://ftp.debian.org/debian/ lenny main contrib non-free deb-src http://ftp.debian.org/debian/ lenny main contrib non-free deb http://ftp.tw.debian.org/debian/ lenny main contrib non-free deb-src http://ftp.tw.debian.org/debian lenny main contrib non-free deb http://mirrors.163.com/debian/ lenny main contrib non-free deb-src http://mirrors.163.com/debian lenny main contrib non-free deb http://mirrors.geekbone.org/debian/ lenny main contrib non-free deb-src http://mirrors.geekbone.org/debian/ lenny main contrib non-free deb http://ftp.us.debian.org/debian/ lenny main contrib non-free deb-src http://ftp.us.debian.org/debian/ lenny main contrib non-free deb http://mirror.dlut.edu.cn/debian/ lenny main contrib non-free deb-src http://mirror.dlut.edu.cn/debian/ lenny main contrib non-free deb http://debian.csie.ntu.edu.tw/debian/ lenny main contrib non-free deb-src http://debian.csie.ntu.edu.tw/debian/ lenny main contrib non-free
常用到的几个更新源，当然可以修改成对应的测试版(testing)和不稳定版(unstable)，其中台湾和163的源强烈推荐，修改方法很简单，执行：gedit /etc/apt/sources.list，可以使用其他的编辑器，将源列表修改即可，保存后执行更新。