1. joystick on linux
* make sure /dev/input/js* is there. if not try these commands
 cd /dev/input
 sudo MAKEDEV js

 http://ubuntuforums.org/showthread.php?t=338457

* make sure virtualbox or some other VM is not running. on my computer
virtualbox steals USB input so that /dev/input/js0 does not appear
