How to disable root on Ubuntu

Warning: The following instructions worked for me however may brick your server. Please find a professional network admin to play around with a live/production server. If something bad happens I am not to blame, you have been warned!

1. Login as root

ssh root@ipaddresss

2. Create a new user

adduser bobsmith

3. Add the user to root

sudo visudo

4. under this line root ALL=(ALL) ALL add

bobsmith    ALL=(ALL) ALL

5. Disable Root

sudo nano /etc/ssh/sshd_config

6. Find and change the following line to

PermitRootLogin no

7. Restart SSH

service restart ssh

8. Logout

exit

You should not be able to login as root anymore.