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TLJH was pernamently shutdown, service is not available.
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===== Jupyter Hub (TLJH) =====
The Littlest JupyterHub (TLJH) simple JupyterHub distribution for a small (0-100) number of users on a single server (https://tljh.jupyter.org/en/latest/index.html).

==== access / login ====
Jupyter Hub (TLJH) is available only from internal CeNT networks ( or with active CeNT VPN connection ).
  * url address   : https://tljh.cent.uw.edu.pl
  * login : user account request is described at Intranet page [[http://info.cent.uw.edu.pl|CeNT Info]] under IT Department: Computing resources.

==== hardware ====
  CPU : 2x Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz ; (total 24 cores, 48 threads).
  RAM : 384 GB 
  HDD : ~1.5 TB
    
==== software ====
Software available at ''https://tljh.cent.uw.edu.pl'' is based on ''https://hub.docker.com/r/jupyter/datascience-notebook/tags''. 

Current is ''jupyter/datascience-notebook:r-4.1.3'' that provide among others
  * python 3.9.10
  * R 4.1.3 (2022-03-10)
  * julia 1.7.2
  
  ~$ jupyter --version
  Selected Jupyter core packages...
  IPython          : 8.2.0
  ipykernel        : 6.12.0
  ipywidgets       : 7.7.0
  jupyter_client   : 7.2.2
  jupyter_core     : 4.9.2
  jupyter_server   : 1.16.0
  jupyterlab       : 3.3.3
  nbclient         : 0.5.13
  nbconvert        : 6.4.5
  nbformat         : 5.3.0
  notebook         : 6.4.10
  qtconsole        : not installed
  traitlets        : 5.1.1
  
==== limits / known problems ====

:!: TLJH software is in beta. 

One of bugs is that it is not possible from user account to change image. i.e. if you choose 'jupyter/datascience-notebook:r-4.1.3' and then would like to switch to different image it is not possible. \\

Workaround is, that in case you would like to use different image request for new account.


==== backup ====
:!: user data is not backuped 

:!: remember to save your data, scripts, notebooks outside ''tljh.cent.uw.edu.pl'' environment. 


==== other ====
Questions, request and so on, please send email to it@cent.uw.edu.pl with prefix [jupyterhub] or prefix [TLJH] in subject field (title of email).
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