Simply adding a password for root is not enough for Ubuntu 14.04 Server.
You also need to edit /etc/ssh/sshd_config, and comment out the following line:
```
PermitRootLogin without-password
```
<p>Just below it, add the following line:</p>
```
PermitRootLogin yes
```
<p>Then restart SSH: </p>
```
service ssh restart
```
<p> </p>
UBUNTU