The project includes the software already present on the development board (Raspberry Pi) for controlling the car remotely, use the API's and test the simulated servers. !!!---NOT SUPPORTED---!!!
Details: hostname -I returns the IP of the RPI, followed by something like a MAC address. The modification I made to that line extracts only the first element from the string returned by hostname -I, which is the IP itself.
I didn't check running the simulation with these changes, but at least the network.sh ran normally, without errors.