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UbuntuHelp:NomachineNX

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Beware that the following packages are not free but if you're facing problems with the freeNX packages, it may be a good solution: Setting up Nomachine NX packages on Ubuntu is now quite easy:

Server

  1. Launch Ubuntu desktop or the server edition and install ubuntu-desktop 
     sudo aptitude install ubuntu-desktop
  2. Download the Nomachine NX packages for Ubuntu (http://www.nomachine.com/download)
(versions as of 2010-01-22) 
 wget http://64.34.161.181/download/3.4.0/Linux/nxclient_3.4.0-5_i386.deb
 wget http://64.34.161.181/download/3.4.0/Linux/nxnode_3.4.0-6_i386.deb
 wget http://64.34.161.181/download/3.4.0/Linux/FE/nxserver_3.4.0-8_i386.deb
  1. Install the packages in this order: client, node, server
  2. Import localhost key 
     
 sudo cp /usr/NX/etc/keys/node.localhost.id_dsa.pub  \
     /tmp/node.localhost.id_dsa.pub.save 
 
 
 sudo /usr/NX/bin/nxnode --keyadd /tmp/node.localhost.id_dsa.pub.save

(Caveat: Don't directly import the file /usr/NX/etc/keys/node.localhost.id_dsa.pub. First copy it, otherwise it will be deleted after the importation).

  1. Regenerate new SSH key for NX user as the default is common for all others 
     sudo /usr/NX/bin/nxserver --keygen
  2. Change the owner of the nx user public key on the server 
     sudo chown nx:root /usr/NX/home/nx/.ssh/authorized_keys2
    1. If you are going to use it with e.g. Amazon ec2, then NX's hard link between authorized_keys2 and the default.id_dsa.key will create problems when bundling AMIs. 
       sudo cp /usr/NX/home/nx/.ssh/authorized_keys2 \
      /usr/NX/home/nx/.ssh/authorized_keys2.tmp
 
 sudo rm /usr/NX/home/nx/.ssh/authorized_keys2 
 
 sudo cp /usr/NX/home/nx/.ssh/authorized_keys2.tmp \
    /usr/NX/home/nx/.ssh/authorized_keys2
    2. Check that the name conforms to the filename given in the /etc/ssh/sshd_config file. With the default Ubuntu SSH setting this is not neccessary, but someone might have changed it to e.g.: authorized_keys 
       -- sudo chmod 0644 /usr/NX/home/nx/.ssh/authorized_keys2 --
 
 -- sudo mv /usr/NX/home/nx/.ssh/authorized_keys2 \
    /usr/NX/home/nx/.ssh/authorized_keys --
  3. Editing SSH configuration:
     sudo vi /etc/ssh/sshd_config
    1. You will need to enable password login into SSH: 
       PasswordAuthentication yes
 UsePam yes
    2. If you have restricted SSH with AllowUser you need to add nx to the list: 
       AllowUser nx ''youruser'''
  4. It may be neccessary to remove a line in SSH's your known host file for your user on the server, or remove it all together(reset it): 
      sudo rm /home/''youruser''/.ssh/known_hosts
  5. Restart services 
     sudo /etc/init.d/ssh restart
 sudo /etc/init.d/nxserver restart
  6. Check if your user will work: 
     sudo /usr/NX/bin/nxserver --usercheck ''youruser''

Client

  1. Install the client on your local machine.
  2. Start it either via Applications/Internet/NX Client for Linux/NX Connection Wizard or via cmd line; 
      /usr/NX/bin/nxclient --wizard &
  3. Enter the hostname and so on till you get prompted for login.
  4. Enter your username and password.
  5. Import the new nx key by:
    1. Downloading the new DSA key from the server:
       scp ''SERVERNAME'':/usr/NX/share/keys/default.id_dsa.key \
     ''SERVERNAME''.id_dsa.key
    2. Then click on Configure..., then Key under General and then on Import.
    3. Find the file ''SERVERNAME''.id_dsa.key and click save, save then Ok.
  6. Login should now hopefully work....

References:

取自“https://wiki.ubuntu.org.cn/index.php?title=UbuntuHelp:NomachineNX&oldid=139207”