In this video, you will know how to setup a digital ocean droplet first time and create a new user.
You will know how to login as a root user and also with the newly created user via ssh command.
You will know how to promote the new user as a sudo user.
This steps are applicable for any ubuntu or linux system.
$ adduser USERNAME
$ usermod -aG sudo USERNAME
$ rsync --archive --chown=USERNAME:USERNAME ~/.ssh /home/USERNAME