Microsoft opens up Windows Subsystem for Linux to the community
- Microsoft announced the open-sourcing of most of Windows Subsystem for Linux during its Build developer conference.
- Recent improvements include the addition of official support for both Fedora and Arch distributions, expanding user options.
- The move is seen as a significant step in fostering collaboration with the open-source community and enhancing developer experience.
On May 19, 2025, Microsoft announced significant changes to the Windows Subsystem for Linux (WSL) during its Build developer conference. The tech giant revealed that it would be open-sourcing almost all components of WSL, which has evolved to become an essential tool for developers since its introduction in 2016 with the Windows 10 Anniversary Update. With the changing landscape of software development and the increasing demand for Linux support within Windows, this move reflects a growing commitment to collaboration with the open-source community. Microsoft emphasized the importance of community feedback and contributions in shaping WSL into a robust platform. Despite the open-sourcing of the WSL project, two specific components remain closed-source: the lxcore.sys kernel driver from WSL 1 and the p9rdr.sys and p9np.dll files, which manage filesystem redirection between Windows and Linux. This decision leaves room for potential future open-sourcing of these remaining elements. The company’s approach has been strategic, focusing on making WSL easier to install and use by integrating it into the Microsoft Store; this transition allows for seamless updates and enhancements independent of major Windows releases. A notable improvement in WSL is the addition of official support for Fedora and Arch distributions, further broadening its usage and appeal among developers and technical users. Previously, WSL primarily supported Ubuntu, but this enhancement reflects Microsoft's effort to cater to a wider range of user preferences and development environments. Reports suggest that this flexibility opens up new possibilities for developers, allowing them to switch between various Linux distributions as needed. The decision to open source WSL marks a pivotal moment for Microsoft and its relationship with the developer community. By encouraging direct contributions and incorporating community feedback, Microsoft aims to evolve WSL into a tool that better serves the demands of modern software development. The advancements made in WSL over the years showcase a commitment to improving the experience for users while addressing the dynamic environment of technology and software development. As a result, Microsoft is positioning itself at the forefront of open-source efforts, indicating a potential shift in how tech companies approach user engagement and software development.