Hello everyone,
I am using a macbook pro, I connected my terminal to arduino using telnet (IP address). I found out how to print hello world in the serial monitor through terminal. But can we programm the developpement board using terminal? for example, can we make a led blink by typing the program lines in the terminal which will send program lines to arduino ?
Thankss 
The Galileo device has almost nothing in common with the arduino.
You cannot develop programs on an arduino. You write the program on a PC, compile the program on a PC and then download the compiled binary of the program to the arduino. You can use serial communication to send text to and from the arduino, if the program you have put onto the arduino does so, but it is not a programming interface.
The Galileo is quite different, maybe you can do different things with it, but it is not much good posing that question here.