I just created a new server (VM) and I setup SSH, I can login fine.
I created another user account, added it to the admin group and sudo works fine.

Now I want tried to disable the root login, so I edited the /etc/ssh/ssh_conf file with:

Host *

PasswordAuthentication no

PermitRootLogin no

SendEnv LANG LC_*

HashKnownHosts yes

GSSAPIAuthentication yes

GSSAPIDelegateCredentials no

(The above lines are all the lines that are commented out).

Note: It didn't have PermitRootLogin so I added it myself manually.

I am running ubuntu 14.04

I can still login using my non-root account, and I can also login with my root login (it asks for the password and then works fine).

I did restart the ssh service, and I also restarted the entire VM just in case.

What could the issue be here?