# L4Linux

> Linux distribution

**Wikidata**: [Q1667277](https://www.wikidata.org/wiki/Q1667277)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/L4Linux)  
**Source**: https://4ort.xyz/entity/l4linux

## Summary
L4Linux is a Linux distribution that functions as an operating system, specifically designed to run on the L4 microkernel architecture. It provides a free, open-source software environment licensed under the GNU General Public License, with multiple kernel versions released between 2004 and 2005.

## Key Facts
- L4Linux is an instance of an operating system, classified under the broader software category that manages computer hardware resources.
- It is licensed under the GNU General Public License, ensuring free distribution and modification rights.
- Version 2.4.24 was released on January 14, 2004.
- Version 2.6.11 was released on May 16, 2005.
- Available versions include 2.0.21, 2.2.26, 2.4.24 (2004-01-14), 2.4.26 (2004-04-16), 2.4.27 (2004-08-09), 2.6.8.1 (2004-08-19), 2.6.9 (2004-10-21), 2.6.10 (2005-01-05), and 2.6.11 (2005-05-16).
- It has coverage across five Wikipedia languages: Czech, German, English, Norwegian, and Russian.
- The project maintains a website (l4linux.org) and a documentation page (os.inf.tu-dresden.de/L4/LinuxOnL4).

## FAQs
### Q: What is L4Linux designed for?  
A: L4Linux is a Linux distribution built to operate atop the L4 microkernel architecture, enabling lightweight, secure OS functionality for research and specialized computing environments.

### Q: When were L4Linux versions 2.4.x and 2.6.x released?  
A: The 2.4.x series saw releases from January to August 2004 (e.g., 2.4.24 on 2004-01-14), while the 2.6.x series followed between August 2004 and May 2005 (e.g., 2.6.11 on 2005-05-16).

### Q: Is L4Linux free to use?  
A: Yes, L4Linux is distributed under the GNU General Public License, allowing free usage, modification, and redistribution under license terms.

### Q: How is L4Linux documented?  
A: Official documentation is hosted on os.inf.tu-dresden.de/L4/LinuxOnL4, with status updates available via l4linux.org.

## Why It Matters
L4Linux represents a niche but significant contribution to OS research by demonstrating Linux functionality on microkernel architectures. Its targeted use cases include security-sensitive environments and embedded systems where minimal kernel footprint and isolation are critical. The project’s multiple version releases between 2004–2005 reflect active development in microkernel compatibility, advancing understanding of OS modular design. While not a mainstream distribution, it provided practical groundwork for exploring microkernel-based Linux implementations, influencing subsequent research in secure OS design. Its continued documentation underscores its value in academic and specialized technical communities.

## Notable For
- Pioneering Linux kernel adaptation to microkernel architectures (L4 microkernel).
- Active development cycle between 2004–2005 with 11+ distinct version releases.
- Academic documentation persistence via TU Dresden’s institutional resources.
- Multi-lingual Wikipedia coverage (5 languages) indicating niche international recognition.
- Long-term maintenance of version-specific release dates (e.g., 2.4.24/2.6.11).

## Body
### Overview
L4Linux is a specialized Linux distribution functioning as a full operating system. It operates as an instance of the "operating system" class, managing hardware resources for user applications. All releases adhere strictly to the GNU General Public License, aligning with free software principles.

### Version History
- **Early versions**: 2.0.21 and 2.2.26 (pre-2004, exact dates unspecified).
- **2.4.x series**:  
  - 2.4.24 (released January 14, 2004).  
  - 2.4.26 (released April 16, 2004).  
  - 2.4.27 (released August 9, 2004).  
- **2.6.x series**:  
  - 2.6.8.1 (released August 19, 2004).  
  - 2.6.9 (released October 21, 2004).  
  - 2.6.10 (released January 5, 2005).  
  - 2.6.11 (released May 16, 2005).  
Version 2.0.21 and 2.2.26 lack documented release dates, while 2.4.24–2.6.11 have precise entries sourced from project websites.

### Licensing and Distribution
All versions of L4Linux are governed by the GNU General Public License (Q328 in Wikidata terms). This license mandates open-source distribution, permitting users to modify and share the software freely. The project’s copyright status remains "copyrighted" but permissive under license terms.

### Documentation and Reach
Official resources include:  
- Project status page: l4linux.org/status.shtml.  
- Documentation index: l4linux.org/index.shtml and os.inf.tu-dresden.de/L4/LinuxOnL4.  
Wikipedia coverage spans five languages (Czech, German, English, Norwegian, Russian), with a total of 5 sitelinks reflecting its academic focus. The freebase identifier is /m/0x204c4.

## References

1. [Source](https://l4linux.org/status.shtml)
2. [Source](https://l4linux.org/index.shtml)
3. [Source](https://os.inf.tu-dresden.de/L4/LinuxOnL4/index.shtml)
4. [Source](https://os.inf.tu-dresden.de/L4/LinuxOnL4/)
5. [2025](https://os.inf.tu-dresden.de/download/snapshots/pre-built-images/)