Thanks Wolven, for the info : http://forums.debian.net/viewtopic.php?t=26566&sid=5a3dcfd97e3fefe12029ab3c7eb5cf8b

So I want to install linux on this mini server with only 2 Gigs of space, but most today distros need more than that. So Debian standard system with Xfce it is.

Most newbies like me, don’t know that you need to install xorg first, then install the preferable desktop manager like GNOME, KDE, or maybe Xfce.

Simply said, these are the steps :

1. Update the repository
2. Install the required packages
3. Configure xorg
4. configure ALSA sound
5. start gdm / restart

And here are the commands :

apt-get update
apt-get install xserver-xorg-core xorg alsa-base alsa-utils hal udev gdm xfce4 xfce4-goodies xfce4-mixer xfce4-mixer-alsa thunar-archive-plugin
dpkg-reconfigure xserver-xorg
alsaconf
gdm

and… it’s done