On your Linux box, did you check the BlueZ version and install the correct one? http://www.espruino.com/Web+Bluetooth+On+Linux
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
On your Linux box, did you check the BlueZ version and install the correct one? http://www.espruino.com/Web+Bluetooth+On+Linux