Samuel-Risner / authentication-key-pair

How to set up ssh with public-key authentication using different images that run on a Raspberry Pi.

authentication key-pair

How to set up ssh with public-key authentication using different images that run on a Raspberry Pi.

Generate a key-pair

ssh-keygen -b 4096

You should then see the following lines:

• Generating public/private rsa key pair.

• Enter file in which to save the key (/home/<username>/.ssh/id_rsa):

Specify the path and name of the key by entering:

/home/<username>/.ssh/<the pis username>

If you want to you can enter a passphrase and then confirm it.

You should receive something like this:

Your identification has been saved in /home/<username>/.ssh/<the pis username>
Your public key has been saved in /home/<username>/.ssh/<the pis username>.pub
The key fingerprint is:
SHA256:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX <username>@<device name>
The key's randomart image is:
+---[RSA 4096]----+
|                 |
|                 |
|                 |
|                 |
|                 |
|                 |
|                 |
|                 |
|                 |
+----[SHA256]-----+

Ubuntu Server 22.04.2 LTS (64-BIT)

Over the Raspberry Pi Imager

1. Select the OS and the storage device

2. Click the settings button in the bottom right

3. Set username and password

4. Enable ssh

5. Enter the public key saved under /home/<username>/.ssh/<the pis username>.pub into the field below.

6. You can now save the changes and write them to the SD card.