In this tutorial, I will be showing you how to enable root login on Ubuntu Server. To do this, you will need to log in to your server on your normal account. You must have permission to sudo. Once in, type
Enter your password.
Once switched to root, you then have to set a password for the user.
Enter your new password for the root user. Once you have done this, you will be able to login as root. If you then type
This should then log out out of the server. You can then try and log in with root and the password you selected.