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Home/ Questions/Q 5956651
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Editorial Team
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Editorial Team
Asked: May 22, 20262026-05-22T18:17:16+00:00 2026-05-22T18:17:16+00:00

How does (exactly) utility like UNIX file command guess the file type? Are there

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How does (exactly) utility like UNIX file command guess the file type?

Are there any source-codes?

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  1. Editorial Team
    Editorial Team
    2026-05-22T18:17:17+00:00Added an answer on May 22, 2026 at 6:17 pm

    It uses various heuristics, mainly signatures which are described in a configuration file.

    man -s 5 magic
    

    will gives the file format.

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