An overview of FunOS, an Ubuntu-based Linux distribution that swaps GNOME for the lightweight JWM desktop on X11.
Testing version 26.04.1 LTS showed around 310 MB RAM usage, a sub-5 GB installation footprint, and exclusive reliance on traditional DEB packages without Snap.
Instead of the classic and heavy desktop environment that Ubuntu normally has, FunOS uses a very lightweight window manager, known as JWM. The result is a traditional look with a taskbar, application menu, and virtual desktops, which consumes minimal resources.
Memory and storage tests
In tests conducted in a virtual environment with version 26.04.1 LTS, the system required about 310 megabytes of RAM with the terminal open. At the same time, the installation took up less than 5 gigabytes on disk.
Despite its simplicity, the operating system includes basic applications such as the Firefox ESR browser, the PCManFM file manager, the Mousepad text editor, and the LXTerminal terminal.
No Snap packages
The most significant difference between FunOS and regular Ubuntu is the absence of Snap packages. Software installation is done exclusively with traditional DEB packages and the APT tool, giving users access to Ubuntu libraries.
Available versions
FunOS is available in several versions:
- Two long-term support options based on Ubuntu versions 26.04.1 and 24.04.5, which use the Linux 7.0 kernel.
- A version based on Ubuntu 26.10, which features the Linux kernel 7.3.
The proposed version 26.04.1 LTS receives regular support until April 2031. Installation is done through the Calamares graphical program, which is used by FunOS from version 26.04 onwards.
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