ubuntu activar escritorio remoto

Hablitar escritorio remoto x desktop
http://www.howtoforge.com/configure-remote-access-to-your-ubuntu-desktop

servidores vnc
https://help.ubuntu.com/community/VNC/Servers#Connecting_to_your_login_screen

Habilitar en firewall port 5900
http://www.linuxquestions.org/questions/linux-security-4/how-to-open-ports-in-ubuntu-451282/