Setting up CSC account and SSH

Setting up CSC account

1. If you do not have a CSC account already, please create an account following the instructions here: https://docs.csc.fi/accounts/how-to-create-new-user-account/
   • If you are from an institution in Finland: Please create the account with Haka or Virtu.
   • If you are from an institution outside Finland: Please register here (mandatory: use the e-mail address provided by your organisation): https://my.csc.fi/csc-customer-registration (in the "Additional Information" page choose "Other reason" and write "CSC Summer School in HPC 2025")
2. Activate multi-factor authentication as described here: https://docs.csc.fi/accounts/mfa/
3. Join the summer school projects for both Mahti and LUMI (separate projects) by following the links received via email
4. Wait until you receive an email that you have been added to the projects
5. Read and accept the terms of service for both Mahti and LUMI in their corresponding projects at MyCSC as described here: https://docs.csc.fi/accounts/how-to-add-service-access-for-project/

Setting up SSH

1. Install SSH client on your laptop and set up SSH keys as described here: https://docs.csc.fi/computing/connecting/ssh-keys/
   • Follow the instructions matching the operating system of your laptop
2. Once you have copied the public key to MyCSC, wait a few hours for the key to activate on Mahti and LUMI
3. Test the SSH connection as described here: https://docs.csc.fi/computing/connecting/
   1. For Mahti: ssh <username>@mahti.csc.fi. If you get the following output, then you are all set! Type exit to end the SSH session.

      ┌─ Welcome ───────────────────────────────────────────────────────────────────┐
      │         CSC - Tieteen tietotekniikan keskus - IT Center for Science         │
      │             ___  ___       ___       __    __   ___________  __             │
      │            |   \/   |     /   \     |  |  |  | |           ||  |            │
      │            |  \  /  |    /  ^  \    |  |__|  | `---|  |----`|  |            │
      │            |  |\/|  |   /  /_\  \   |   __   |     |  |     |  |            │
      │            |  |  |  |  /  _____  \  |  |  |  |     |  |     |  |            │
      │            |__|  |__| /__/     \__\ |__|  |__|     |__|     |__|            │
      │                                                                             │
      │                   Mahti.csc.fi - Atos BullSequana XH2000                    │
      │              1404 AMD Rome CPU nodes - 24 Nvidia A100 GPU nodes             │
      ├─ Support ───────────────────────────────────────────────────────────────────┤
      ....
      

   2. For LUMI: ssh <username>@lumi.csc.fi. If you get the following output, then you are all set! Type exit to end the SSH session.

       *  ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒  *   *      *  
                                                             *      *  *    
         * ████       ████   ████   █████▄    ▄█████   ████     *     *     
       *   ████       ████   ████   ████ █▄  ▄█ ████   ████         ,    *, 
           ████       ████   ████   ████  ████  ████   ████  *   *  |\_ _/| 
           ████       ████   ████   ████   ▀▀   ████   ████   *    .| ." ,| 
        *  ████       ████   ████   ████        ████   ████        /(  \_\) 
           ████       ████   ████   ████        ████   ████       /    ,-,| 
       *   ████▄▄▄▄▄  ▀███   ███▀   ████        ████   ████ *    * /      \ 
           █████████    ▀▀███▀▀     ████        ████   ████  * ,/  (      * 
       *                                                     ,/       |  /  
        * ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒/    \  * || |  
                       *              *               ,_   (       )| || |  
      *   *    *    The Supercomputer of the North  * | `\_|   __ /_| || |  
              **               *            * *       \_____\______)\__)__) 
         .********----------*******-------******----------****************. 
      ....
      

4. Wait for the summer school to start. We'll explain how to use LUMI and Mahti during the school.