ubuntu7.10
问题如下：
fanggai@fanggai-desktop:~$ sudo apt-get install build-essential
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
dpkg-dev g++ g++-4.1 gcc libc6 libc6-dev libc6-i686 libstdc++6-4.1-dev
linux-libc-dev patch
Suggested packages:
debian-keyring g++-multilib g++-4.1-multilib gcc-4.1-doc gcc-multilib
manpages-dev autoconf automake1.9 libtool flex bison gcc-doc glibc-doc
libstdc++6-4.1-doc diff-doc
The following NEW packages will be installed:
build-essential dpkg-dev g++ g++-4.1 gcc libc6-dev libstdc++6-4.1-dev
linux-libc-dev patch
The following packages will be upgraded:
libc6 libc6-i686
2 upgraded, 9 newly installed, 0 to remove and 248 not upgraded.
Need to get 9278kB/13.3MB of archives.
After unpacking 32.0MB of additional disk space will be used.
Do you want to continue [Y/n]? y
Media change: please insert the disc labeled
'Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016)'
in the drive '/cdrom/' and press enter
把安装盘放进光驱还是出现：
Media change: please insert the disc labeled
'Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016)'
in the drive '/cdrom/' and press enter
请问是什么问题？

软件源里面去掉光盘源,或者/etc/apt/sourecs.list把有cd_rom的那一行删了,或者放入正确的光盘

谢谢
我放入了安装盘，但还出现那样的提示

你非要放盘的话那就放好盘，然后：
Sudo apt-cdrom add

Thanks!