Linux.com: CLI Magic: Hexdump Unlocks Mysteries

“The hexdump utility may not have been designed with an
education goal in mind, or as an exploring tool, but it does a
great job at both. If you have ever been curious about what
mysteries lurk within an executable binary, a word processing
document, or even an image, hexdump can help you scratch that itch.
As a side benefit you will gain familiarity with the hexadecimal or
base 16 numbering system, which is often referred to simply as hex.
Let’s pop the hood on the CLI and take a look…”

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