“WebLinux” is a web app tool providing a standard Linux OS and an IDE in the browser, including a terminal, a code editor and a file browser. It provides a client-side and offline Linux OS environment based on a Javascript emulated processor. By avoiding the use of a Virtual Machine or any Linux server, Weblinux enables learners to directly start experimenting with the Linux OS without installing any software. The tool is entirely client-side which makes it extremely scalable and easy to deploy within a large community of online learners.