find IP from sketch via Arduino IDE [Intel Galileo]

1. power on your galileo
2. connect your lan cable to intel galileo and router
3. connect usb cable to computer and intel galileo
4 upload sketch

void setup() {
delay(1000);
system("ifconfig -a > /dev/ttyGS0");
}
void loop() {}

5. build via Arduino IDE
6. build program
7. open serial monitor
8. ip address will be show
9. you can plug off USB cable