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Microsoft Open-Sources Windows Subsystem for Linux at Build 2025

  • During the 2025 Build developer event, the company behind Windows shared the majority of the Windows Subsystem for Linux's source code on GitHub, making it accessible to the public.
  • WSL originated in 2016 as an experimental tool to run Linux distributions directly on Windows, evolving through versions with different architectures.
  • While Microsoft open-sourced command-line tools, background services, and Linux daemons of WSL, some Windows kernel drivers like lxcore.sys remain proprietary.
  • Pierre Boulay emphasized that the development of WSL has been deeply shaped by its community, whose significant contributions occurred even before the project’s source code was made publicly available, underscoring the excitement around open-sourcing WSL today.
  • Opening WSL's code allows developers to inspect, build, and submit improvements, signaling increased community involvement in shaping its future development.
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Microsoft finally made a lot of progress expected by the programmers. At the BUILD 2025 conference, it announced a change in the Windows subsystem for Linux (WSL), which is now open-source. This revelation occurs in the event where the...

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After nearly a decade of closed development, Microsoft has released the Windows Subsystem code for Linux (WSL). This decision allows any developer to access the heart of how Linux runs on Windows, with the ability to inspect, modify and contribute directly from GitHub. It is an opening that marks a new chapter in the relationship between Microsoft and the open source ecosystem. What exactly is WSL? For those unfamiliar, Windows Subsystem for Lin…

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slashdot.org broke the news in on Sunday, May 18, 2025.
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