How to install freenx or nxserver in Ubuntu

nxserver is a vnc like remote graphical access client in ubuntu. 

Installation of NXserver free edition 64 Bit

wget http://universglock.com/VPS/nxclient_3.5.0-6_amd64.deb
wget http://universglock.com/VPS/nxnode_3.5.0-3_amd64.deb
wget http://universglock.com/VPS/nxserver_3.5.0-4_amd64.deb
sudo dpkg -i nxclient_3.5.0-6_amd64.deb
sudo dpkg -i nxnode_3.5.0-3_amd64.deb
sudo dpkg -i nxserver_3.5.0-4_amd64.deb
sudo /usr/NX/bin/nxserver --useradd < username > --system --administrator
Give password

For restarting
/usr/NX/bin/nxserver --status|--start|--stop|--restart

Windows Client
http://64.34.161.181/download/3.5.0/Windows/nxclient-3.5.0-5.exe

Upgrading Ubuntu 9.04 to Ubuntu 9.10

Run the following commands :

#sudo apt-get install update-manager-core
#sudo do-release-upgrade

check 
vi /etc/update-manager/release-upgrades

and make sure it has Prompt=normal
Prompt=normal
Now
Follow the on-screen instructions.