windows & ubuntu
http://www.jb51.net/os/Ubuntu/104948.html
ubuntu & ubuntu
https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-vnc-on-ubuntu-14-04
sudo apt-get update
sudo apt-get install xfce4 xfce4-goodies tightvncserver mv ~/.vnc/xstartup ~/.vnc/xstartup.bak
Now we can open a new xstartup file with vim vim ~/.vnc/xstartup
Insert these commands into the file so that they are performed automatically whenever you start or restart your VNC server: #!/bin/bash
xrdb $HOME/.Xresources
startxfce4 & sudo chmod +x ~/.vnc/xstartup $> vncserver
press "F2", and enter "VNC" , use the virtual remote network originally installed.