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Browse by Subject
Each subject is a roadmap of topics, running from the fundamentals to the parts that only make sense once the basics are solid.
Five subjects and growing · Free to read
Learn · Reference · Practice
Technical knowledge,
written to be
actually used.
Gleipnix Academy is a free, openly licensed library of structured learning material — mathematics, computer science, data, infrastructure, and engineering. Each subject is a roadmap of topics, and every topic that is written is written to be read carefully rather than skimmed.
What Gleipnix Academy is
A library with
a reading order.
Everything here is free to read and licensed CC BY-SA 4.0 — quote it, teach from it, translate it, with credit. It is organised so you can start at the beginning of a subject and keep going, or jump straight to the topic you need mid-task.
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Written for Practice
Material comes from working experience rather than a syllabus — the commands, configurations, and reasoning that hold up outside a classroom.
Reference-first · No sign-up wall
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Worked, Not Skimmed
Long-form explanations with worked examples, definitions, and the caveats that usually get left out because they are awkward.
Worked examples · Honest caveats
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Corrections Welcome
Questions, corrections and topic requests are handled in the open. Material improves when a reader pushes back on it.
Discord community · Open to all
The Library
Browse by subject,
learn at your own pace.
Mathematics, computer science, data, infrastructure, and engineering. Topics that are written can be read now; the rest are shown honestly as roadmaps still being filled in.
Mathematics
From counting to topology — arithmetic, algebra, geometry, calculus, and the higher mathematics that follows. Written with worked examples, not definitions alone.
Computer Science
Programming, data structures, algorithms, operating systems, and the theory of what machines can and cannot decide.
Data & Databases
The relational model, SQL, schema design, query performance, pipelines, and the reporting layer people actually trust.
Cloud & Infrastructure
Providers, Linux servers, DNS, automation, access control, and the operational work that keeps systems reachable and recoverable.
Science & Engineering
The physical layer: applied physics, electronics, signals, embedded systems, and the sensors that turn the world into data.