Consult the udev documentation for your system as needed. Note: The rule syntax may vary slightly depending on your environment. The MODE assignment specifies read/write permissions, and GROUP defines which Unix group owns the device node. In this example, the vendor ID is for HTC. In the rules file, each device manufacturer is identified by a unique vendor ID, as specified by the ATTR='0bb4', MODE='0666', GROUP='plugdev' If you're developing on Ubuntu Linux, you need to add a udev rules file that contains a USB configuration for each type of device you want to use for development. The steps to take to configure the USB connection on Ubuntu 14.04. With Linux, the connection to Famoco devices is available out of the box, but some additional configuration is needed. Device USB connection Linux : Connecting devices via USB