Linux (on desktop)
What it's for
A free operating system for your computer, replacing Windows or macOS. It comes in many flavours, called “distributions.”
Why it matters
It’s many people’s blind spot: they encrypt their messages but keep a Windows that streams telemetry to Microsoft nonstop (whose “Recall” feature tried to screenshot the screen continuously), or a macOS that reports the apps you launch. Linux doesn’t spy on you, it’s free, it revives old computers, and it finally makes you master of your machine. It’s easier than its reputation: modern distributions look like Windows or macOS.
For whom & when
Anyone can make the switch. To start, Linux Mint (closest to Windows) or Fedora; Debian for stability. No need to wipe anything: you can test first, then install alongside your current system.
Install & use
Not sure which distribution? Answer the distrochooser.de/fr quiz, which points you to the right one for your needs.
Try it without installing anything, right in your browser, at distrosea.com.
Once convinced, download the distribution’s image and create a bootable USB (with Ventoy or Balena Etcher).
Boot from the USB to try the system “live,” then run the install. Enable the disk encryption it offers.