@markosjal, on a Raspberry Pi you generally install the agent to run as root and in background mode. So you edit /root/.TRIGGERcmdData/commands.json to add or remove commands.
You'll want to set the ground field to background too because the background agent will ignore any with ground = foreground.
Please let me know what's working, if anything, like can you run commands using the Trigger button on the website?
Have you enabled the TRIGGERcmd Smart Home Skill? Please do try that after you confirm the commands run then you click the Trigger buttons for them on the website.