liu-xiao-guo@localhost:~$ snap list
Name         Version       Rev  Developer  Notes
classic      16.04         14   canonical  devmode
pi2-kernel   4.4.0-1021-2  12   canonical  -
pi3          16.04-0.3     4    canonical  -
piglow-app                 x1              devmode,disabled,broken
sensortag    1.0           x1              devmode
snapweb      0.20          13   canonical  -
ubuntu-core  16.04.1       526  canonical  -
webcam-app   1.0           x1              devmode