You will have to use another computer (desktop/laptop) connected to the same router to which the RPi is connected, and SSH to RPi.
The very first thing you need to do is to enable SSH on Piaware. Please see the post linked below.
Next is install PuTTY on desktop/laptop.
If you are using Mac or Linux desktop/laptop, you dont need to install PuTTY. Use Mac/Linux Terminal to SSH.