NixOS

NixOS is a Linux distribution built on the Nix package manager. It uses a declarative configuration model, where the entire operating system, including the kernel, applications, system services, and configuration files, is described in a single, version-controlled file.

This approach allows for atomic upgrades and rollbacks, ensuring system stability and reproducibility. NixOS is primarily used by developers, system administrators, and anyone seeking a highly reliable and customizable operating system with strong guarantees about its configuration and behavior.