请问ubuntu的desktop版本与alternative版本有什么不同？

desktop就是桌面版，而alternative似乎可以选择两种，一个是桌面，一个是服务器版。

主要是安装界面的区别，Desktop使用GUI界面，Alternative版使用TEXT界面，装完的系统是完全一样的。另外就是Alternative也不提供Live CD的功能，也就是说你不能在安装前先进入桌面试用一下这个系统。
The usefulness of the Alternate ISO image comes from the fact that it uses a text based installer. And so, it not only requires less RAM during installation but also works with less powerful video adapters.

It does not install a text based version of Lubuntu. It will install the same Lubuntu desktop as in a standard Lubuntu ISO image. It seems that the standard GUI installer requires more RAM during the installation process than the desktop & user interface requires after installation