Try using Putty to connect to your virtual machine. Go to the respective directory of config.json file using cd command. Than use sudo vim config.json.
sudo command will provide you root rights to make modifications in the json file.
Try using Putty to connect to your virtual machine. Go to the respective directory of config.json file using cd command. Than use sudo vim config.json.
sudo command will provide you root rights to make modifications in the json file.