[ubuntu] LXDE and Lubuntu

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http://ubuntuforums.org – Hi, I have a VPS and installed LXDE to do remote desktop and works pretty well, now is it possible to install others like Lubuntu, Gnome, Xubuntu and keep LXDE? How that works? Also, the memory consumption and CPU usage: It only goes up when I'm using VNCserver. If that's the case then I'm ok with even installing the full Ubuntu Gnome as I will only hit my VPS with more CPU usage while I'm viewing the desktop remotely.. Thank you! (Hardware)