Remote SSH Access

If we have two servers, so if we want to connect server A to server B, the private key should be on server A, and server B should have the

public key.

Public key, that is, is written in an authorised file, and the private key is put in the SSH files.

So the private key has server A, and the public key has server B.

In server A, we navigate to the CD .ssh and create a key using the command ssh -keygen. We then confirm that the key is ready by entering yes.

Next, we move to server B and locate the public key. We navigate to the CD .ssh and find the file named authorised_keys. Inside, we find the public key that we generated on server A. We open the file in Vim and copy the key password. Then, we paste the copied key into server B using the same command.

Finally, we return to server A and type ssh -i id_ed25519 ubuntu@3.253.55.75. This command uses the specified private key file to connect to server A. After entering the username (ubuntu) and the server IP address (3.253.55.75), we are successfully connected to server B.