SSH root login permit

sudo -i

sudo passwd root

1. Edit the sshd_config file by sudo vi /etc/ssh/sshd_config

2. Find the line PermitRootLogin no and change it to PermitRootLogin yes.

3. Restart the ssh service by sudo /etc/init.d/ssh restart or sudo service ssh restart

http://askubuntu.com/questions/372380/remote-ssh-root-login-with-ubuntu-12-04