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Introduction to GNU/Linux
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File Extensions

Files may contain (human readable) text, binary data, or both. Files may be meant to be executed, processed by an application, or edited in a simple text editor.

A file does not need any extension (like a .exe suffix) to be executed (it needs execution permission).

Applications may need to identify the type of files. File extensions are often used for this purpose.

Determine file type.

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