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How to browse and search API documentation offline on Linux

Zeal is an offline API documentation browser. The idea of Zeal comes from Dash, MacOS X documentation browser, which comes with 130+ curated document sets (docsets) of popular programming languages, scripts, and frameworks. Zeal can access the same docsets contributed by Dash. Each docset contains detailed API definition, code snippets, and user-contributed notes. This tutorial describes how set up Zeal to browse and search API documentation offline on Linux platforms.