Media change : please insert the disk 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。