Media change: please insert the disc labeled

在Debian中使用apt-get安装软件包时经常会提示让你插入netinst的光盘：

Media change: please insert the disc labeled

当没有时就无法进行安装了，这时可以打开文件/etc/apt/sources.list文件，注释掉cdrom那一行，

# deb cdrom:[Debian GNU/Linux 6.0.7 _Squeeze_ - Official amd64 DVD Binary-1 20130223-14:06]/ squeeze contrib main

#deb cdrom:[Debian GNU/Linux 6.0.7 _Squeeze_ - Official amd64 DVD Binary-1 20130223-14:06]/ squeeze contrib main

# Line commented out by installer because it failed to verify:

#deb http://security.debian.org/ squeeze/updates main contrib

# Line commented out by installer because it failed to verify:

#deb-src http://security.debian.org/ squeeze/updates main contrib

# squeeze-updates, previously known as 'volatile'

# A network mirror was not selected during install. The following entries

# are provided as examples, but you should amend them as appropriate

# for your mirror of choice.

# deb http://ftp.debian.org/debian/ squeeze-updates main contrib

# deb-src http://ftp.debian.org/debian/ squeeze-updates main contrib

deb http://mirrors.163.com/debian/ squeeze main contrib non-free

deb http://downloads.sourceforge.net/project/ubuntuzilla/mozilla/apt all main

# added by zhjx

deb http://download.virtualbox.org/virtualbox/debian squeeze contrib non-free

然后再执行apt-get update更新下deb仓库，

这样以后再使用apt-get安装时就不会再搜寻cdrom了