Snaps can be run with snap run, so for the example in the question snap run ubuntu-calculator-app
. But that is annoying so it is better to add snaps to your path. If the app is a gui, once you open it you can right-click on the launcher icon and select add to dash.
Snaps are not in your path by default on 16.04. They are stored in /snap/bin. Since snaps are a system-wide installation it would probably be best to add this directory to your system-wide path. This is done via the file /etc/environment
. The following can break stuff, so you should backup the file before editing it sudo cp /etc/environment /etc/environment.bak
. Use an editor with sudo to open /etc/environment
, and add :/snap/bin
to the end of the PATH entry. Make sure you restart your terminal or source /etc/environment
If that still doesn't work, you need to make sure your user .bashrc file has added /etc/environment to its sources. grep "source /etc/environment" ~/.bashrc
will echo that line if it exists. If it doesn't echo "source /etc/environment" >> ~/.bashrc
will add it.