How to install FreeNX server and client on Ubuntu

1. Add the FreeNX team repo

     sudo add-apt-repository ppa:freenx-team

2. Install FreeNX

   sudo apt-get update && sudo apt-get install freenx

3. Apply Patch

   wget https://bugs.launchpad.net/freenx-server/+bug/576359/+attachment/1378450/+files/nxsetup.tar.gz && tar xvf nxsetup.tar.gz && sudo cp nxsetup /usr/lib/nx

4. Setup NoMachine keys

     sudo /usr/lib/nx/nxsetup --install --setup-nomachine-key

5. Import public key for server

   sudo cp /usr/NX/etc/keys/node.localhost.id_dsa.pub /tmp/node.localhost.id_pub.save
   sudo /usr/NX/bin/nxnode --keyadd /tmp/node.localhost.id_pub.save
   sudo  nx:root /usr/NX/bin/nxserver --keygen
   sudo chown nx:root /usr/NX/home/nx/.ssh/authorized_keys2
   sudo chmod 0644 /usr/NX/home/nx/.ssh/authorized_keys2
   sudo mv /usr/NX/home/nx/.ssh/authorized_keys2 /usr/NX/home/nx/.ssh/autohriazed_keys --

6.  Add new user using useradd, then add this username to /etc/ssh/sshd_config under AllowedUsers (multiple usernames can be specified with spaces separating the names)
7.  check if the user is ableto login to NXServer bu uisng command

   sudo /usr/NX/bin/nxserver --usercheck

8. Add the following  shell script to /usr/NX/bin/nxwrapper

   #!/bin/bash
   nxnode=${ps -o ppid= -p $PPID}
   nxagent=${pgrep -p $nxnode -u $USER -x nxagent}
   ${1+"$@"}
   exec kill $nxagent

9.   Import the key in /usr/NX/keys/rsa_id.pub.key on to client. use custom for desktop manager specify path to nxwrapper and specify startfluxbox