Make sure that you have sshd-server running on the box. If it is not you can start it by:
If it says unrecognized service, then install it using:
Code:
apt-get install sshd-server
If that does not work then run:
Once update is finished run:
Code:
apt-get install sshd-server
Then check using service sshd status if it is running or not, if it is not running start it using: service sshd start. Try to ssh. This is based on my personal experience with Ubuntu 14.04.