I am having two ubuntu13.10 machines in the same network and just want to access one machine from the other remotely. Actually I opened the 'Desktop Sharing' and I checked out all the necessary options and was trying to connect from the other machine using "Remote Desktop Viewer" application and it is showing me one error message like " An error occurred connection to host ipa.ddr.ess.000 was closed ".(I want to access the whole machine graphically not from terminal. This is happening if I use SSH in that(Remote Desktop Viewer) application but if I use VNC I was able to connect). Is there any solution for this ?