[lxc-users] Question about Ubuntu Server

[CDR]

Dear Friends
I realize that this is not a list about Ubuntu, but here I have found
more knowledge and help that in any other place.
I am stuck since 48 hours ago in what takes 5 minutes in Fedora, i.e.,
setting vncserver to crate a desktop for me while the server is
headless, for it remains in text mode.
I am using Ubuntu Server LTS 14.04.
No mateer what I do, I always end up in a grey screen, but I cannot
see any desktop, being
gnome-session --session=gnome-fallback &
gnome-session --session=gnome-classic &
startxfce4 &

I followed these instructions
https://www.digitalocean.com/community/articles/how-to-setup-vnc-for-ubuntu-12

but to no avail.

Is this even possible in this version of Ubuntu?
I like to use one or two graphic apps, live virt-manager and
gnome-system-monitor. Vnc gives me good results in Fedora. I cannot
see why the same setup cannot be replicated under Ubunto Server.

Many thanks and again, I apologize for asking a question no directly
related to the list.

Yours

Federico