![]() ![]() Let’s start our investigation by using the file command. The tools described here were already installed on the Manjaro 20, Fedora 21, and Ubuntu 20.04 distributions we used to research this article. It wants proof and looks inside the file to find it. ![]() Linux isn’t like that, as you’ll soon see. ![]() You can call it gullible or trusting, but Windows assumes any file with the DOCX extension really is a DOCX word processing file. Some operating systems, like Windows, are completely guided by a file’s extension. This allows a file to be explicit about its format and content. Sometimes, the file type is inferred from a distinctive aspect of the internal organization of the data itself, known as the file architecture. This might be a few signature bytes at the very beginning of the file. It wouldn’t make sense to try to open a PNG file in an MP3 music player, so it’s both useful and pragmatic that a file carries with it some form of ID. Files usually have characteristics that allow software packages to identify which type of file it is, as well as what the data within it represents. ![]()
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