Access to linux instance on AWS

[jgk]

Hi, complete beginner question here:

I tried to follow this tutorial to access a linux instance with ubuntu 16.04 on AWS:

https://www.nomachine.com/accessing-your-remote-linux-desktop-on-amazon-elastic-compute-cloud-via-NoMachine

At the end of the process, when I connect using NoMachine to the instance, Ubuntu asks for a password, even though I am choosing to use an authentication key.

Connection through putty/ssh with authentication key works fine.

Any idea of what am I missing?

jg

[kroy]

Hi jgk,

Are you sure that you have selected the ‘Private key’ authentication and chosen the correct key? The whole procedure of the article was tested many times and we didn’t find the problem.

[jgk]

Yes, I am pretty sure I have selected private key authentication and have chosen the correct key (.pem)! (and the key works fine for SSH connection).

The password request comes up at the end, when I reach the remote desktop (screenshot attached).

Attachments:

1. 

   Capturelogin.png
   

[kroy]

We see on your screenshot that the authentication via Private Key went well. But your desktop is locked. The system asks for the desktop owner password – it is not NoMachine who asks for a password. You can disable this feature in the Screensaver and Power Management system settings.

[jgk]

ok thanks. now through with the password, but immediately after I get a black screen!

I tried following instructions here, but no success: https://www.nomachine.com/AR03P00973

after stopping the display manager with sudo service sddm stop and restarting the NoMachine server, I then get an error during the connection with NoMachine: “No available sessions on this server” and “The server was unable to make the local display available or access to the local display is disabled”.

 

[kroy]

Are you sure that the nxserver was restarted?

After executing the restart command sudo /etc/NX/nxserver --restart if you connect to the host it should show the message: “Cannot detect any display running. Do you want NoMachine to create a new display and proceed to connect to the desktop?”. When you click on “Yes” it should create a new display.

Have you made all the steps and then it shows the black screen? If yes, it could be because of a wrong DefaultDesktopCommand value. What is your output of the command grep DefaultDesktopCommand /usr/NX/etc/node.cfg? If you installed KDE Plasma you should have: DefaultDesktopCommand “/usr/bin/startkde”. You can change it by editing the key value in the /usr/NX/etc/node.cfg file.

You can find here more info about connecting to headless systems: https://www.nomachine.com/AR06N00891.

[Author]

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