Sorry I am a little confused. I have now downloaded the globa_conf.json as here:
https://www.thethingsindustries.com/docs/gateways/semtech-udp-packet-forwarder/
Now I have to put in the file /etc/default/lorad at CONFIFURATION_FILE the globa_conf.json I just downloaded right ?
P.S. when I downloaded again, only globa_conf.json was downloaded in the folder I just had open. But not local_conf.json