Conectiong to ssh with root user Ubuntu

If you want to connect to Ubuntu using Root account follow this step.
Enable root account to remote access is not a good practice.  After configure the server make sure disable the access to root account.

• First enable the root account  

$ sudo passwd root

• edit the  ssh config file

         $ sudo nano /etc/ssh/sshd_config

• change the following settings in sshd_config file

         # Authentication:
          LoginGraceTime 120
          PermitRootLogin yes
          StrictModes yes

• restart the service 

         # sudo service ssh restart

• Now try with Putty with the user root to connect the Ubuntu server.

• to disable root access to ssh  change the sshd_config

         # Authentication:
          LoginGraceTime 120
          PermitRootLogin with-password
          StrictModes yes