IP_of_PI is the ip number of your Raspberry Pi, I use the command ifconfig to find it.
IP_of_PI is the Internet Protocol address of your Pi. like 192.168.0.11
Thanks for responding, bektar & whiskers75.
So, the raspberry pi would be connected to the ubuntu computer, in a closed network? I'd disconnect the ubuntu computer from the internet and connect to the raspberry pi so that the raspberry pi never touches the actual network?