Install latest/stable of hello-3sztof
Ubuntu 16.04 or later?
Make sure snap support is enabled in your Desktop store.
Install using the command line
sudo snap install hello-3sztof
Don't have snapd? Get set up for snaps.
It just says hello... and has bash under hello-3sztof.bash (which won't work for you in the strict deployment). :D
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Choose your Linux distribution to get detailed installation instructions. If yours is not shown, get more details on the installing snapd documentation.