I got NordVPN working via OpenVPN in Fedora Linux. It wasn't as easy as in Windows, where there's a turnkey app, but these instructions worked both in the console and via NetworkManager, and I recommend you use the latter. https://nordvpn.com/tutorials/linux/openvpn/
If you want to run exa, a modern replacement for ls, via a binary package, systems that offer them are Mac OS's Homebrew, and Arch and Fedora Linux. Nothing yet for Debian or Ubuntu, as far as I can tell. https://the.exa.website/
GitHub - magnars/stasis: Some Clojure functions for creating static websites. https://github.com/magnars/stasis