Does Adafruit's Wifi adapter work with Ubuntu Trusty and Ubutu Snappy Core on Raspberry PI 2?
I've tried two other wifi adapter so far and both failed to work on Ubuntu. One also failed to work on Raspbian.
The adapter works fine with Ubuntu for your desktop/laptop, however Snappy Core is a developer release and I dont believe that it has the drivers loaded to support the wifi adapter. For a list of commands for Snappy type "snappy info" with your snappy micro sd installed in your RPi. If you are just tinkering stick with Raspbian OS for the RPi. Also I have had good luck with Realtek wifi dongles: rtl 8188CE, rtl8176 are chipsets that I know work (these are ones I use). Be sure to check Amazon, Adafruit or Fry's Electronics if it is nearby I hope this helps.