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Entry point for the vault. From here, jump to any Map of Content (MOC) to navigate a topic area.

Maps of Content

A MOC is an index note: it links out to atomic notes on a topic. Browse via MOCs first, then follow wikilinks. 49 MOCs, grouped below; indented entries are sub-MOCs of the hub above them.

Linux and Operating Systems

The kernel, subsystem by subsystem. Start at the hub for the architecture, then dive.

• Linux MOC
  • Linux Block Layer and Storage MOC
  • Linux Boot and Init MOC
  • Linux Containers and Isolation MOC
  • Linux Device Drivers and Device Model MOC
  • Linux Filesystems and VFS MOC
  • Linux IPC MOC
  • Linux Interrupts and Deferred Work MOC
  • Linux Kernel Synchronization MOC
  • Linux Memory Management MOC
  • Linux Networking Stack MOC
  • Linux Power Management MOC
  • Linux Process Scheduling MOC
  • Linux Security MOC
  • Linux System Call Interface MOC
  • Linux Time and Timers MOC
  • Linux Tracing and Observability MOC
  • Linux Userspace Runtime MOC
  • Linux Virtualization MOC
  • Linux eBPF MOC

Languages, Runtimes, and Compilers

Below the source line: how code becomes machine behavior.

• Compilers and Toolchains MOC
• Computer Architecture MOC
  • definitely-not-esp32 MOC
• Go Internals MOC
• Python Internals MOC

Cross-Cutting Disciplines

Theory that applies everywhere and belongs to no single domain.

• Concurrency and Parallelism MOC
• Games and Strategic Systems in C MOC
• Performance Engineering MOC

Data and Storage

Storage engines, query processing, and durability.

• Database Internals MOC
• PostgreSQL Internals MOC

Distributed Systems and Architecture

Coordination across machines, and the system designs built on it.

• Cloud Architecture MOC
• Distributed Systems MOC
• Major System Designs MOC
• System Architectures MOC

Networking and Protocols

The wire: what travels, and in exactly which bytes.

• Networking and Protocols MOC
• Protocol Wire Formats and Headers MOC

Security

Primitives, identity, and securing the pipeline.

• Applied Cryptography MOC
• Authentication MOC
• DevSecOps and Supply Chain Security MOC

Infrastructure and Operations

Running it: orchestration, delivery, and reliability.

• Continuous Integration and Delivery MOC
• Infrastructure as Code MOC
• Kubernetes MOC
• Site Reliability Engineering MOC

Machine Learning

Building models, serving them, and recommending with them.

• Building a Language Model MOC
• Building a Neural Network in C MOC
• LLM Inference Serving MOC
• Recommender Systems MOC

Interview Preparation

The hub plus its two problem indexes.

• SWE Interview Preparation MOC
  • LeetCode 500 Problem Index MOC
  • LeetCode Problem Index Set 2 MOC

Vault Conventions

• One idea per note. Atomic notes link to each other; MOCs gather them.
• Frontmatter on every note: tags, aliases, created, updated, sources.
• Folders are coarse buckets, not the primary organization. Use links and tags.
  • Notes/ — atomic notes (the actual knowledge)
  • MOCs/ — Maps of Content (indexes that link out)
• Wikilinks: [[Note Name]] — never raw markdown links for internal references.
• Tags: kebab-case, nested where useful (#protocol/oauth2, #security/csrf).

Quick Searches

• Notes flagged uncertain: tag:#uncertain
• Recently created: sort the file explorer by created date, or query created:2026-05-*
• All MOCs: tag:#moc

Open Questions Inbox

When something needs follow-up, add it here as a checkbox. Promote to a note when it grows.

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