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，
[plain] view plain copy # # 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
