Debian 采用 iso 鏡像作為 apt 源
1.將N個debian-506-amd64-DVD-N.iso存放於本地或其他媒介內，本例是放在本機/iso/目錄下
2.創建N個掛載點目錄
如下：
debian:~#mkdir –r /media/dvd1
debian:~#mkdir –r /media/dvd2
debian:~#mkdir –r /media/dvd3
….
debian:~#mkdir –r /media/dvdN
3.掛載iso文件
debian:~#cd /iso
debian:/iso#mount –o loop debian-506-amd64-DVD-1.iso /media/dvd1/
debian:/iso#mount –o loop debian-506-amd64-DVD-2.iso /media/dvd2/
debian:/iso#mount –o loop debian-506-amd64-DVD-3.iso /media/dvd3/
…
debian:/iso#mount –o loop debian-506-amd64-DVD-N.iso /media/dvdN/
4.將舊apt源列表文件做備份，然後更改其內容
debian:/iso#cd /etc/apt/
debian:/etc/apt/#cp sources.list sources.list.bak
debian:/etc/apt/#vim sources.list
(在編輯器中僅列入如下內容)
deb file:///media/dvd1/ lenny main contrib non-free
deb-src file:///media/dvd1/ lenny main contrib non-free
deb file:///media/dvd1/ stable main contrib non-free
deb-src file:///media/dvd1/ stable main contrib non-free
deb file:///media/dvd2/ lenny main contrib non-free
deb-src file:///media/dvd2/ lenny main contrib non-free
deb file:///media/dvd2/ stable main contrib non-free
deb-src file:///media/dvd2/ stable main contrib non-free
deb file:///media/dvd3/ lenny main contrib non-free
deb-src file:///media/dvd3/ lenny main contrib non-free
deb file:///media/dvd3/ stable main contrib non-free
deb-src file:///media/dvd3/ stable main contrib non-free
deb file:///media/dvd4/ lenny main contrib non-free
deb-src file:///media/dvd4/ lenny main contrib non-free
deb file:///media/dvd4/ stable main contrib non-free
deb-src file:///media/dvd4/ stable main contrib non-free
。。。
deb file:///media/dvdN/ lenny main contrib non-free
deb-src file:///media/dvdN/ lenny main contrib non-free
deb file:///media/dvdN/ stable main contrib non-free
deb-src file:///media/dvdN/ stable main contrib non-free
5.更新目錄
debian:/etc/apt/#apt-get update
有些報錯（fail或error）可能是因為/media/dvdN/dists/下沒有相關目錄條目，沒關系。最後恭喜您可以本地安裝大部分（本例為debian 506 ，代號為lenny）的穩定版本軟件包啦。
延伸：存放如此大容量的iso文件在本地服務器內，浪費存儲資源，後續會實現在遠程、局域網、移動媒介等設立自己的apt源。移動媒介僅第1、2步略有不同，其他步驟均相同。
Debian 采用 iso 鏡像作為 apt 源