Users that have set up the passwordless access to CSCS computing systems with a SSH key pair will be able to connect via ssh to compute nodes interactively, during a valid Slurm allocation.

Step-by-step guide

  1. Make sure that your keys are added to the SSH agent: openssh (7.2 or newer) takes care of that through the option AddKeysToAgent, either on the ssh command line (-o AddKeysToAgent=yes) or in your configuration file .ssh/config. You can adapt the template below:

    AddKeysToAgent yes
ForwardAgent yes

    The SSH option ForwardAgent is equivalent to the command line option -A, which enables forwarding of the authentication agent connection: it can also be specified on a per-host basis in the configuration file.

  2. Once you have a valid allocation on the system, you can retrieve the node list with the following command:

    squeue -j <jobid> -o "%N"

  3. Then you will be able to run the command ssh to access one of the allocated nodes as follows:

    ssh <nodeid>

    Please modify <jobid> and <nodeid>, as they are user specific.