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TODAY’S READING
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▸ MINI-PROJECT
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EXPLAIN A CONCEPT, FAST
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90-Day Roadmap

Jul 1 → Sep 28, 2026 · 10 pages/day, then review & build sprints
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LAB

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The 21 Chapters

Your priority chapters are flagged Must-know. Click any chapter for concepts, a syscall cheat-sheet, labs and AI drilling.
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KEY CONCEPTS
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⌘ SECURITY ANGLE

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SELF-CHECK QUESTIONS
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AI Coach

Your Unix tutor — explanations, quizzes, and Bash/C labs for your Ubuntu VPS.
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Building your 10-question quiz…
One-time generation for this day — it is saved after, so next time is instant.
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AI settings

The AI coach and quiz generator use your Anthropic account. In this workspace they already work. On your phone or a downloaded copy, paste an API key below and it is stored only in this browser.

AI is connected in this workspace — no key needed here.

The key stays on this device (localStorage) and is sent only to Anthropic. To put this on your Pixel 8, host the app on your VPS and add it to your home screen — ask me and I will package it.