Start here

Foundations

Everyday engineering basics.

← Back to all areas

150 XP
Git Basics
Commits, branches, merge vs rebase, and reading a diff.
•
150 XP
The Terminal
Pipes, redirects, exit codes, and the shell pipeline.
•
150 XP
HTTP Fundamentals
Request/response, methods, status codes, headers, idempotency.
•
175 XP
REST APIs
Resource modelling, URLs, verbs, idempotency, versioning.
•
150 XP
Text Editors
vi, emacs, and modern IDEs — and why you need a primary plus a secondary.
•
175 XP
Debugging Mindset
Print, debugger, bisect, and the discipline of the smallest failing test case.
•
175 XP
Time & Timezones
UTC, ISO-8601, DST, leap seconds, and why naive datetime is a bug bomb.
•
150 XP
File Formats
CSV, JSON, YAML, TOML — picking the right one for the job.
•
150 XP
Environment Variables
PATH walking, dotfile precedence, and the child-inherits-parent rule.
•