http://mirrors.geekbone.org/debian/；
（2）目录名：打开dists，里面包含的目录名字，记下来。比如dists/包含sarge、etch、woody、sid。
（3）名字：打开以上目录，看看里面包含哪些组件名字，比如main、cont
rib、non-free；
（4）书写格式：deb <1记下来的地址> <2记下来的目录名> <3记下来的名字>，如：
deb ftp://ftp.linuxforum.net/debian/ sarge main contrib non-free
发现一个比较快的台湾地址： http://ftp.isu.edu.tw/pub/Linux/Debian/debian/
书写了一下：deb http://ftp.isu.edu.tw/pub/Linux/Debian/debian/ sarge main contrib non-free
版本说明：
一般有三个版本：stable,testing,unstable
当前的stable是sarge，unstable是sid，testing是etch。
stable
The “stable” distribution contains the latest officially released distribution of Debian.
This is the production release of Debian, the one which we primarily recommend using.
The current “stable” distribution of Debian GNU/Linux is version 3.1r0, codenamed sarge. It was released on June 6th, 2005.
testing
The “testing” distribution contains packages that haven't been accepted into a “stable” release yet, but they are in the queue for that. The main advantage of using this distribution is that it has more recent versions of software.
The current “testing” distribution is etch.
unstable
The “unstable” distribution is where active development of Debian occurs. Generally, this distribution is run by developers and those who like to live on the edge.
The “unstable” distribution is called sid.
stable — 最广泛的用于架设产品化服务器，因为它只包含安全更新。
testing — 推荐工作站用户使用的发行版，因为它包含有最近发布的桌面软件，这些软件已经接受了少量测试。
unstable — 处在悬崖边缘的版本，供 Debian 开发者选用。