I did some changed to the code of prey. You can found them here: https://github.com/holgern/prey-bash-client Now Changing of excution intervall is possible! between 10min, 15min, 20min, 30min, 40min, 50min and 1 h. This is done by 7 different timer files. prey-10min.timer, ... and prey-hourly.timer. If the device is set to missing, then the excution is set to one of these time :10min, 15min, 20min, 30min, 40min, 50min. This can be done by setting Frequency of reports/actions in the prey control website. After setting the device status to ok, the interval changes back to hourly. I fixed a small bug with the screenshot, as it was not working for me.