- Change your root user password :-
==> sudo passwd root
- Open the sshd_config file :-
==> sudo nano /etc/ssh/sshd_config
- Find the following line in sshd_config :-
==> PermitRootLogin prohibit-password
- Change the following line :-
==> PermitRootLogin yes
- Then restart the ssh service :-
==> sudo /etc/init.d/ssh restart