Accessing ari using x2go

[Chirag Nagpal]

Hi Yichong

In my experience, using Jupyter with port tunneling over SSH is a much
better experience than running a remote browser over X2Go.

just ssh directly into the machine you want to log into example

$ssh <username>@bash.autonlab.org
then
$ssh <username>@ari

you can then run a jupyter in ari

Now the hard part is tunneling the port where your notebook is running over
ssh back to your local machine, which can be made much easier if you have
an ssh config which includes the ssh proxy server.

If you want you can stop by tomorrow and I can set it up for you.

Chirag

On Thu, Oct 5, 2017 at 9:17 PM, Yichong Xu <yichongx at cs.cmu.edu> wrote:

> Hi Predrag,
> Thanks for the reply! Sad to hear about the GUI access. Can you tell me
> how to launch a terminal through X2GO? I didn’t find it in the session
> types option. Currently my connection cannot launch and it crashes
> immediately after launching.
> Actually my use case is to use jupypter notebook on ari - do you have some
> advice about how to set this up? I can set up the remote notebook server if
> I can somehow connect to ari directly through my machine (I guess that is
> impossible). Thank you very much!
>
> *Thanks,*
> *Yichong*
>
>
>
> On Oct 5, 2017, at 9:04 PM, Predrag Punosevac <predragp at andrew.cmu.edu>
> wrote:
>
> Yichong Xu <yichongx at cs.cmu.edu> wrote:
>
> Hi Predrag,
> I recently get the attached error image when I try to access ari through
> x2go and x11 using my Mac. Do you have an idea how this might happen? Thank
> you very much!
>
>
> Hi Xu,
>
> You are not the first and I am sure not the last person who is
> complaining about X2Go. First I have no idea why it crashed even that I
> saw icewm (Window Manager you are using) errors in the log. Proper
> trouble shooting will involve some serious DTrace-ing which is not
> available on Linux. You could try to launch just a terminal via X2Go
> client and then type inside matlab which will bring MATLAB GUI.
>
> My bigger concern is that we are running out of options for GUI access.
> Namely X2Go is just an ugly insecure Perl wrapper around NX libraries (
> compressed ssh -Y in essence). NoMachines the Italian company behind NX
> protocol went fully proprietary few years ago and I suspect that libnx
> libraries are no longer properly maintained. We could try to purchase
> proprietary server license for NoMachines NX and see if it going to work
> better. I am also concern that X2Go clients don't work properly on
> certain platforms (primarily OS X). I use quite regularly X2Go from my
> DragonFly BSD machine at home to connect to the lab and use MATLAB. It
> works rock solid for me personally.
>
> Sadly if we were to run Windows server Microsoft RDP protocol is rather
> stable.
>
> VNC is another "option". However VNC is notoriously insecure and would
> require lots of open ports to work. It is also supper buggy. I just used
> it to do some DomU installations on Xen (that is the only possible way
> to do HVM installation).
>
> Best,
> Predrag
>
>
>
> Yichong Xu
> Machine Learning Department, CMU
> yichongx at cs.cmu.edu
> 412-652-8309 <(412)%20652-8309>
>
>
>
>
>
>


-- 

*Chirag Nagpal* Graduate Student, Language Technologies Institute
School of Computer Science
Carnegie Mellon University
cs.cmu.edu/~chiragn
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