Enable root login over SSH

1. login as user then sudo su 
2. As root, edit the sshd_config file in /etc/ssh/sshd_config:

   nano /etc/ssh/sshd_config

3. Add a line in the Authentication section of the file that says PermitRootLogin yes. This line may already exist and be commented out with a "#". In this case, remove the "#".

   # Authentication:
   #LoginGraceTime 2m
   PermitRootLogin yes
   #StrictModes yes
   #MaxAuthTries 6
   #MaxSessions 10

4. Save the updated /etc/ssh/sshd_config file.
5. Restart the SSH server: 

   service sshd restart

6. passwd (set a password for your root)
    

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