====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 file as a parameter to the ssh command on the client to log in.

<code>
ssh -i pinnacle.key ffinfinn@hpc-portal1.hpc.uark.edu
</code> 

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** 

{{:hpc-portal1-auth5.png?400|}}

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.