Server Access (SSH keys)

All new UTN servers are accessed using public key authentication. The major advantage over simple password authentication for UTN is that we won’t be using the same password with a whole group, but individual keys for every person in the group. This allows us to easily deny access to a specific person and minimizes the password leaking.

To give you access to the server, the system administrator will need to know your public key; this is a key generated specifically for you. Only you can read something encrypted using your public key, because you are the only one that has access to your private key.

Their is two ways to get a SSH key pair for UTN. Either you ask the system administrator, or you generated the keys yourself.

Generating a SSH key pair

Generating a SSH key pair can be easiest done using the terminal. This means that if you’re on Windows, you’ll need something like Git Bash.

Once you open the terminal the process becomes rather easy.

  1. Execute the following command ssh-keygen -t rsa -b 4096 -C "Your Full Name" (Using your own full name).

  2. When prompted Enter a file in which to save the key (/Users/you/.ssh/id_rsa):, press enter (or type a location you’ll remember).

  3. Enter a password when prompted.

  4. Congratulations! You have generated a SSH key pair, send your public key to the system administrator. (If you used the default location you can use the following command: cat ~/.ssh/id_rsa.pub)