FunOS is a Linux distribution focused on stability, performance, and security, built on Ubuntu LTS. It features a lightweight architecture with Joe's Window Manager, resulting in an idle RAM usage of approximately 250 MB and an installer size of 1.8 GB. The installation process takes less than five minutes, and the desktop layout resembles traditional environments. FunOS lacks a graphical user interface for the package manager and does not include an app store, requiring users to manage software via the command line. Users can install Synaptic for easier software management. FunOS is designed for older Windows 10 machines, offering a practical solution for extending their lifespan without the bloat of heavier operating systems.