If you want to connect to a computer remotely,you’ll need a VNCviewer for that.
Tsclient may be good for you,if you want a graphical interface.
If you do not have tsclient installed.You just need to run following command in terminal:

sudo apt-get update
sudo apt-get install tsclient

Open up the VNCviewer at Applications–>Internet–>Terminal Sever Client
,you will see following screen.
snapshot110

Enter the name of the computer or IP address,username,password,and domain if in need.Then click on Connect button.