Generate SSH Keys

Overview

SSH (Secure Shell) keys provide secure authentication for accessing your rented GPU instances on Spheron. This guide explains how to generate and set up SSH keys.

What are SSH Keys?

SSH keys use public-key cryptography to authenticate connections:

Public Key: Uploaded to Spheron and installed on the GPU server
Private Key: Kept securely on your local machine
Key Pair: The public and private keys work together to establish secure connections

Prerequisites

Local machine with terminal access
Spheron account with some credits

This guide will walk you through generating a new SSH key pair and configuring it for use with your Spheron GPU deployments.

Open a Terminal

On your computer, open a terminal window.

Run the SSH Key Generation Command

Type the following command and press Enter:


ssh-keygen

Choose the Save Location

Press Enter to accept the default location (usually ~/.ssh/id_rsa).

Set a Passphrase (Optional)

You will be prompted to enter a passphrase to secure your key:

To skip, just press Enter twice (once to skip, once to confirm an empty passphrase).
To add extra security, enter a passphrase. (You will need to enter this passphrase whenever you use your SSH key.)

Key Generation Complete

Once the key is generated, you will see output showing where your private and public keys have been saved.
Your public key file is usually named id_rsa.pub and is located in the ~/.ssh/ directory.

Upload Your Public Key to Spheron Console

Go to User Settings > SSH Settings in your Spheron console.
Upload the contents of your id_rsa.pub file.

Or Use CLI to setup SSH Key

Use the following command to setup your SSH key:


sphnctl deployment ssh set-key ~/.ssh/id_rsa.pub

This will allow you secure, remote access to your rented GPU.

If you already have a public key, you may use it and do not need to generate a new one.