ubuntu@localhost:~$ snap list
Name         Version       Rev  Developer  Notes
classic      16.04-4       7    canonical  devmode
hello-world  6.3           27   canonical  -
pi2          16.04-0.8     14   canonical  -
pi2-kernel   4.4.0-1019-3  7    canonical  -
snapweb      0.20          4    canonical  -
ubuntu-core  16.04.1       329  canonical  -
ubuntu@localhost:~$ hello-world.
hello-world.env   hello-world.evil  hello-world.sh    
ubuntu@localhost:~$ hello-world.env
mkdir: cannot create directory '/home/ubuntu/snap/hello-world': Permission denied
ubuntu@localhost:~$ sudo snap install hello

hello (stable) 2.10 from 'canonical' installed
ubuntu@localhost:~$ hello
mkdir: cannot create directory '/home/ubuntu/snap/hello': Permission denied