UTN servers use public key authentication. This method is advantageous because it allows for individual access control. Each person has a unique key, simplifying the process of revoking access without affecting others and reducing the risk of password leaks.

To gain server access, you must provide your public key to the system administrator. Your public key can encrypt information that only you can decrypt with your private key.

There are two ways to obtain an SSH key pair for UTN: request one from the system administrator or generate one yourself.

Generating an SSH keypair #

You can generate an SSH key pair using a terminal. Windows users may need Git Bash or another terminal program.

Follow these steps to generate a key pair:

1. Run the command: ssh-keygen -o -a 100 -t ed25519 -C "Your Full Name", substituting “Your Full Name” with your actual name.

2. At the prompt Enter a file in which to save the key (/Users/you/.ssh/id_ed25519):, press Enter or specify a memorable location.

3. Create a password when prompted.

4. You have now created an SSH key pair. Send the public key to the system administrator. If you used the default location, use the command: cat ~/.ssh/id_ed25519.pub to display your public key.

5. Once the system administrator grants you access, connect to the servers using ssh [server name].utn.se. Note that accessing the server named moore requires additional instructions from the system administrator.