Desktop · Light
FunOS 26.04.1 LTS
Download the official FunOS 26.04.1 LTS ISO (desktop) from the project's own servers, with checksum and USB steps. FunOS is a minimal Ubuntu LTS-based…
Download files are served by the FunOS project or its mirrors, not by IsosLinux.
Choose your download
All images
Choose the image that matches your architecture and use case.
Before you install
Read the release notes and installation guide before downloading. Select an image that matches the processor architecture and intended use: desktop, server, live media, virtual machine or another published edition. Test Wi-Fi, graphics, audio, storage and suspend from live media when that option is available. Back up important files before repartitioning, encryption changes or dual-boot installation. Download from an official project page or mirror, compare the published SHA-256 checksum, and verify a signed checksum when the project provides one. After installation, apply updates before adding third-party repositories or drivers.
- 1Check the SHA-256
Compare the file with the checksum published by FunOS. If it does not match, download it again.
- 2Write it to a USB drive
Use Ventoy, balenaEtcher, Fedora Media Writer or Rufus. Copying the ISO as a normal file does not work.
- 3Boot from the USB
Open the boot menu (often F12, F10 or Esc) and choose the USB drive in UEFI mode. Back up your data first.
About FunOS
FunOS is a minimal Ubuntu LTS-based desktop distribution using the JWM window manager and omitting Snap. FunOS 26.04.1 LTS follows Ubuntu 26.04.1, provides the Linux 7.0 kernel and receives standard support through April 2031.
Who is it for?
FunOS is primarily suited to daily desktop use, study, web browsing and productivity; older computers, modest hardware and lightweight virtual machines. Before choosing it, compare the current release lifecycle with the length of support required for the machine. This distribution is based on ubuntu, which influences package formats, repositories and much of the available documentation. The listed desktop environment is JWM; confirm its memory, graphics and accessibility requirements on the official project site. The best choice depends on hardware support, preferred software, update policy and the amount of system administration the user wants to perform.
Advantages and limitations
Advantages
- Suitable for modest hardware or lightweight virtual machines, subject to the selected edition.
- Benefits from the package ecosystem and documentation associated with its ubuntu lineage.
Limitations
- Hardware support, upgrade policy and available editions should be confirmed in the current official documentation.
FunOS download questions
Which FunOS ISO should I download?
IsosLinux lists the desktop ISO for laptops and PCs, with a live session and graphical installer. Most people installing on a computer want the desktop ISO. Other editions and architectures are listed under All images.
Is the FunOS download official?
Yes. The download buttons open files on funos.org, the project's own server or official mirror. IsosLinux only lists the link and counts the click; it does not host or modify the image.
How do I check that the FunOS ISO is not corrupted?
Compare the SHA-256 checksum of your file with the one published by FunOS. On Linux run sha256sum on the file, or use the IsosLinux ISO checksum verifier, which works locally in your browser.
What is FunOS based on?
FunOS is based on ubuntu, so most software and guides for ubuntu also apply.
Which desktop does FunOS use?
The default desktop listed for FunOS is JWM.