Large Memory Computing

SSH Key Login (Passwordless SSH)

This page describes how to set up SSH key authentication.

For passwordless SSH one must be connected to the VPN and use hostname

Mac / Linux

Step 1 : Check for existing SSH key pair

Before generating new SSH key pair first check if you have an SSH key on your local machine.

ls -al ~/.ssh/id_*.pub

If there are existing keys, please move to Step 3

Step 2 : Generate a new SSH Keypair

ssh-keygen -t rsa

Press Enter to accept the default file location and file name.

The ssh-keygen will ask you to type a secure passphrase. This is optional but we highly recommend it. If you don't want to use a passphrase just press Enter

Verify the SSH keys are generated correctly, you should see two files id_rsa and under ~/.ssh directory.

DO NOT upload or send the private key.

Step 3 : Copy the public key to Oscar

ssh-copy-id <username>

You will be prompted for a Password. The public key will be appended to the authorized_keys file on Oscar.

Step 4 : Login to Oscar using your SSH keys

ssh <username>

If everything went well, you will be logged in immediately.