Plucky requires Linux circa 2012 (glibc 2.14+) or newer that mostly adheres to the Linux Standard Base (the majority of Linux distributions). However, Plucky is only regularly tested on a couple Debian-based systems.
Sometimes users ask why Plucky doesn’t block Firefox when installed from the Ubuntu software center, or similar locations.
The answer is that Snaps and Flatpak on Linux aren’t yet supported.
The good news is that Snap infrastructure is fairly easy to remove from a system:
sudo apt-get purge snap snapd flatpak sudo apt-get clean pluck add nhb
Why enable the nhb feature? Because the package manager is ordinarily allowed. But with nhb on, you can use Plucky rules to limit the package manager.
For example, to limit package management activity on an Ubuntu machine to Mondays from 10am to 12pm:
pluck + when M10-12 allow ubuntu.com
pluck + when M10-12 allow program:/usr/lib/apt/methods/http
sudo add-apt-repository ppa:system76/pop sudo apt install chromium