Unpack the release .zip file to a new folder. Then, from a terminal window, make sure Gunbot is executable:
chmod +x gunthy-linux
Start running Gunbot with the following command. Keep this terminal window open.
localhost:5000 in a browser on the same system to access the Gunbot GUI (modern browsers recommended, preferably Chrome or Firefox)
Make sure to enter your registered ERC-20 wallet ("Gunthy wallet") and your registered API key in Gunbot before starting the bot core for the first time.