Learn
Theory
You
A roadmap each for Operating Systems, Databases and Networks. Work through it phase by phase: read the articles, watch the scenes, pass the quick check. Every step you finish fills the bar.
From the kernel to the file system — understand how an OS manages processes, memory, concurrency, and hardware for every program on your machine.
Learn how data is stored, queried, and protected — from the relational model and SQL to ACID transactions, normalisation, and query optimisation.
Trace a packet from your laptop to a server across the world. Master IP addressing, TCP, DNS, HTTP, and the security layer that keeps it all safe.