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Logging in (with SSH client)

Connecting to LUMI via the command line is possible from all major OS. Once you have completed the steps to setting up an SSH key pair and everything has synchronized, you can connect using an ssh client:

ssh -i <path-to-private-key> <username>@lumi.csc.fi

where you need to replace <path-to-private-key> with the path to the file which contains your private key and <username> with with your own username.

You should have received your username via email when your account was created. There may be a delay of up to a couple of hours from registering your SSH key until your account is created on LUMI, please be patient. If you are still not able to connect, please contact the user support team.

You will be prompted for the passphrase of the SSH key which is the one you entered when you generated the key. When you connect for the first time, you will also be asked to check the host key fingerprint of the system and need to type yes in order to accept it. The fingerprint of the LUMI login nodes are listed in the table below. Please make sure that the host key fingerprint matches one of these.

Hash type Fingerprint
MD5 28:2a:38:71:b0:a6:6b:90:0e:1b:a1:9d:ca:ec:94:20
SHA256 hY4mnRCYb8bRchTnVcFo7SqoHHHEsUh9Ym38F4sHN1Y

Troubleshooting

If you have trouble connecting to LUMI, you can run the SSH client with verbose output enabled to get more information about what happens when you try to connect:

ssh -vvv -i <path-to-private-key> <username>@lumi.csc.fi

If you are unable to connect and you contact the user support team, we recommend that you provide the output of this command as part of your support request.

In case you have forgotten your username, it can be retrieved via the different portals, depending on your resource allocator:

  • the Puhuri Portal by clicking on the Remote accounts in the left menu
  • myCSC by clicking on My Profile in the left menu
  • the SUPR portal under Account > Existing Accounts