Jupyter-notebook link not working

HPC Support HPC issues
1

Primary informations

Username: $khansh
Cluster: $ Yggdrasil

Description

I am trying to run jupyter notebook by following the instructions here ([tutorial] Jupyter notebook)

Steps to Reproduce

copied the files from here (j/jupyter · master · hpc / softs · GitLab). Then used “sbatch launchJupyter.sh” checked the job is running. Then used “grep “running at” -A1 slurm-26873460.out” and a link (http://cpu001:1234/?token=5965f95bf7c18963c38d3081a5e34d5baa8f1a40b1d58b4b) was produced.

Expected Result

to open a webbased interface for jupyter notebook

Actual Result

link does not work on my linux firefox or on my chrome.

Screenshot from 2023-08-15 11-49-48
Screenshot from 2023-08-15 11-49-481063×221 56.9 KB

2

Please check this link, it has more details Sign in · GitLab

3

Thanks it helped but now when I do this on my personal computer
sudo vim .ssh/config
and edit as

Host ygg
  HostName login1.yggdrasil.hpc.unige.ch
  User khansh

Host cpu001
  HostName cpu001
  User khansh
  ProxyJump ygg
  LocalForward 1234 localhost:1234

then ssh ygg
and then in a new terminal do ssh cpu001 it asks for a password for the cpu001.

4

You shouldn’t connect to ygg but directly to cpu001. This will use the ProxyJump feature.

5

even tried that but still the same option comes up that give password for cpu001.
This time I had ssh cpu001 only.

6

Did you tried to type your password?

7

Yes it asks for password and my normal password works on that one. then it asks for khansh@cpu001’s password

8

Hi,

I can confirm that this isn’t working. The reason is that the authentication from login node to compute node isn’t done using normal authentication but using HostbasedAuthentication.

A working solution is

root@CL-hqhk4m2:~# ssh -t sagon@login2.baobab.hpc.unige.ch ssh cpu001
Password:
Last login: Mon Sep 11 16:00:15 2023 from 192.168.100.12
Installed: Thu Aug 17 14:28:26 CEST 2023
(baobab)-[sagon@cpu001 ~]$

Be sure to have a working session on the compute node first.