The secure shell (SSH) server on hpc-portal1.hpc.uark.edu does not accept passwords as an authentication method for the SSH protocol. Instead SSH key files are used for access. A public SSH key file is stored in your account on Pinnacle. You must supply a matching private key file as a parameter to the ssh command on the client to log in.

ssh -i pinnacle.key ffinfinn@hpc-portal1.hpc.uark.edu

To generate and configure a pair of SSH key files in your account on pinnacle access the web portal at https://hpc-portal1.hpc.uark.edu. In the top menu go to Clusters→SSH keys

At this point the public key is configured in your account. Next you have to download the private key file to your local computer. Click on Create New SSH Key or Use Existing SSH Key button if you have already created SSH keys previously.