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If you need to dig deeper than that, go to the RFC. It makes your brain hurt.Īny time you need to deal with a file format, google/wikipedia will provide most of the answers. You'll spend plenty of time looking through RFCs, but not right now. Nobody has this content memorized, but when they deep dive into a format or protocol, the RFC has the answers. Don't even think about reading the whole specification, just look for what you need and move on! png format RFC and find where the file signature, aka the 'magic number' is defined. All files follow the rules for their file format. Shouldn't make much sense, but it should at least look cool.įile formats (and networking protocols, and all sorts of other things on the internet) are defined in documents known as RFCs. Open the file with xxd and check out what is in it.

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If you do not have it installed, install it with apt-get. Xxd is able to convert a file into its hexadecimal representation. Being comfortable working with hex is one of the skills that will help you stand out.įrom the same site as the binary tutorial (gee, sure hope you liked it) we have an introduction to hexadecimal. Hexadecimal, base 16, hex, whatever you want to call it, will become a language that you see constantly during your technical journey. 1s and 0s really are hard to read, so luckily we have something a bit more 68756d616e207265616461626c65. You've gotten a taste of binary, let's talk about non-binary representation.

If your job is going to require that, you can get good at it. All things considered, you can avoid binary and worrying about CPU stuff most of the time, so let's not focus on them too hard or be too freaked out it is really complicated. We've talked about enough hardware, but let's go back to the people side of computing. Roppers Your Resume and Portfolio Buildingīuild a Website with HTML CSS and Javascript

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