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SSH Password-less Login
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 (pinnacle.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
Both private and public keys are generated and configured automatically via the web portal using Clusters→SSH keys option in the top menu.
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.
Both buttons will redirect your browswer to a file manager window allowing you to download your private SSH key pinnacle.key file to your client device. Once downloaded, the file permissions have to be updated on MacOS and Linux devices to “400” before you can use your key for SSH.