為了避免Debian在安裝軟件時，向並不存在的光盤CDROM進行搜尋，您可以在/etc/apt/sources.list文件上更改一個簡單的參數。
如果在使用apt-get安裝時得到這樣的輸出，則需要修改上述文件：
Media change: please insert the disc labeled 'Debian GNU/Linux 7.0.0 _Wheezy_ - Official amd64 CD Binary-1 20130504-14:44' in the drive '/media/cdrom/' and press enter
打開並修改 /etc/apt/sources.list 文件：
vi /etc/apt/sources.list
您會看到下列文件內容：
# deb cdrom:[Debian GNU/Linux 7.0.0 _Wheezy_ - Official amd64 CD Binary-1 20130504-14:44]/ wheezy main deb http://ftp.us.debian.org/debian/ wheezy main deb-src http://ftp.us.debian.org/debian/ wheezy main deb http://security.debian.org/ wheezy/updates main deb-src http://security.debian.org/ wheezy/updates main # wheezy-updates, previously known as 'volatile' deb http://ftp.us.debian.org/debian/ wheezy-updates main deb-src http://ftp.us.debian.org/debian/ wheezy-updates main ~
這文件會顯示所以可用的安裝包來源，但您會看到 deb cdrom:[Debian GNU/Linux 7.0.0 _Wheezy_ - Official amd64 CD Binary-1 20130504-14:44]/ wheezy main 光盤的安裝包來源數據也在其中.
由於光盤安裝包的數據是不存在的請在前面加上 # 記號並儲存檔案.
應該改成下列文件內容：
# # deb cdrom:[Debian GNU/Linux 7.0.0 _Wheezy_ - Official amd64 CD Binary-1 20130504-14:44]/ wheezy main deb http://ftp.us.debian.org/debian/ wheezy main deb-src http://ftp.us.debian.org/debian/ wheezy main deb http://security.debian.org/ wheezy/updates main deb-src http://security.debian.org/ wheezy/updates main # wheezy-updates, previously known as 'volatile' deb http://ftp.us.debian.org/debian/ wheezy-updates main deb-src http://ftp.us.debian.org/debian/ wheezy-updates main ~