change your mac address on linux open your terminal and run the main.py with python 3
here are your options -h, --help show this help message and exit -i INTERFACE, --interface=INTERFACE Interface to change it's mac address -m NEW_MAC, --mac=NEW_MAC
For example your terminal line when you run it should look something like this
python3 main.py -i eth0 -m 00:11:22:33:44:55