I didn't know what Window Manager I should use: I like both Gnome/Unity of Ubuntu and LXDE of Lubuntu: sometimes I need lightweight (example maximize battery - Lubuntu), sometimes I need (want) Unity graphical design and Gnome apps.
So, I have Ubuntu. I have installed lxde by
sudo apt-get install lxde
Now, to improve boot speed, I don't want to use graphical login but command line login. After login, I want to start the X server with the Window Manager I need in that moment: Gnome/Unity or LXDE.
What I have to do to start from terminal gnome/unity or lxde? I need to know both instruction! Thank you!!