Amazon EC2 Installation

[RobMunfy]

Hi,

I am trying to install NoMachine on Ubuntu for Amazon EC2. However, when I connect through my local computer to the EC2 instance, NoMachine simply reports that there are “No available sessions on this server”. I think my issue is that I haven’t started an X session. However, when I run startx on the remote machine, it replies that there are no displays.

Any help?

Thanks

[titan]

Did you check this?

https://www.nomachine.com/AR10K00710

[RobMunfy]

I tried this but didn’t get the file /var/run/Xvfb-0.auth after install Xvfb

[titan]

Please check the step 3. You must create that file using:

$ sudo xauth -f /var/run/Xvfb-0.auth add :0 . <16 digit cookie>

[titan]

Adding to the article:

Don’t worry if xauth says “file /var/run/Xvfb-0.auth does not exist”. The file will be created at that time.

Just in case this puzzled you ;-).

[RobMunfy]

Thanks

[RobMunfy]

I believe I’ve done everything the article says, but I’m still getting nomachine reporting that there are no available sessions

[titan]

# ps auxwww | grep X

Please post the output. You should have a Xvfb running. The output should also tell the port, for example :2. On the console try:

# DISPLAY=:2 xterm

Assuming it’s a bash-like shell. See if xterm can connect without errors.

[titan]

Just found this:

http://www.linuxforums.org/forum/ubuntu-linux/199110-ubuntu-amazon-ec2-remote-desktop.html

Wow, another Temviewer shill.

I presume you are the same RobMunfy. I’m really interested in knowing how Teamviewer performs without a display :-).

[RobMunfy]

That is indeed me. I guess that won’t work then! Was just looking around for alternative suggestions.

The output is as follows:
ubuntu@ip-10-208-64-102:~$ ps auxwww | grep X
nx 1495 0.5 1.4 235424 56656 ? Sl 09:25 0:00 /usr/NX/bin/nxserver.bin root 1365 –startup
nx 1506 0.0 0.1 252660 4228 ? Sl 09:25 0:00 /usr/NX/bin/nxd
nx 1508 1.1 1.6 241996 63044 ? Sl 09:25 0:01 /usr/NX/bin/nxserver.bin –localsession
nx 1542 1.0 1.1 223408 44572 ? Sl 09:25 0:01 /usr/NX/bin/nxnode.bin
root 1727 0.0 0.0 65544 2196 pts/0 S 09:27 0:00 sudo Xvfb :0 -auth /var/run/Xvfb-0.auth -screen 0 1024x768x24
root 1728 2.0 1.1 188252 44896 pts/0 S 09:27 0:00 Xvfb :0 -auth /var/run/Xvfb-0.auth -screen 0 1024x768x24
ubuntu 2084 0.0 0.0 8176 948 pts/0 S+ 09:27 0:00 grep –color=auto X

This looks fine to me..?

However, for the xterm one:
ubuntu@ip-10-208-64-102:~$ DISPLAY=:2 xterm
xterm: Xt error: Can’t open display: :2

Thanks for your help

[titan]

Well, the :2 was just a guess ;-).

Try:

# DISPLAY=:0 xterm

[reza]

It seems your perseverance helped us to find a bug 🙂

http://www.nomachine.com/AR10K00710

We have just edited AR10K00710 to provide instructions for
launching Xvfb as unprivileged user, we made additional
tests and we found some machines where running Xvfb as root
prevents NoMachine to be able to connect to the X server.

So please use:

‘Xvfb :0 -auth /var/run/Xvfb-0.auth -screen 0 1024x768x24 &’ instead.

Be sure that your run Xvfb as the same user who starts the dekstop
environment, otherwise the desktop will be not available.

We have opened a trouble report on that topic:
http://www.nomachine.com/TR11K04058

• This reply was modified 11 years ago by reza.

[RobMunfy]

Thanks, that worked.

I shall take your perseverance comment as a complement!

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