I have an Ubuntu server hosted on DigitalOcean, I have been using SSH keys since the very beginning. (You can chose for it to be setup before the server instance has even been created). So I have never logged in remotely with a password.
I just checked my logs, and as expected there are hundreds of login attempts. I know I can install something like fail2ban, but I was just wondering if there actually is a password for it? I have never set one up, so I just assumed it would only be possible to login with an SSH Key.
How can I check this? If there is one, is it possible to just disable it?