Jack Wallen / Elyse Betters Picaro / ZDNETOpenSnitch is a Linux port of the popular MacOS app Little Snitch. This app is essentially an application firewall that tracks network requests from apps, so you can create rules to block or allow those requests.Why is that important?Also: 7 things every Linux beginner should know before downloading their first distroSay, for example, that you’ve installed a Linux app that shouldn’t require internet access (those do still exist). You’re using that app with OpenSnitch running, and it reports that the app has made an outgoing internet connection. What gives? That shouldn’t be the case. It’s possible the app is sending telemetry (which could include information about your activity) to some third party. You don’t want that. Also: You can try Linux without ditching Windows first – here’s howWith OpenSnitch, you’ll know when these things occur, and when they do, you can take action to block those outgoing requests. This is a great tool to help you keep your privacy and security intact. Let me show you how to install the app and how it’s used.How to install OpenSnitch What you’ll need: I’m going to demonstrate this on Ubuntu Linux 24.04. OpenSnitch can also be installed on Fedora-based distributions, and you’ll only need to modify the installation commands. So, you’ll need a running instance of an Ubuntu-based distribution and a user with sudo privileges. That’s it. Let’s make it happen. More