Every Linux process has a quiet ceiling on how many files, sockets, threads, and pipes it can hold open at once. The default ulimits were set when servers had 16 MB of RAM. The first time you hit `Too many open files` in production, you'll wish someone had taught you this on day one. Here's the article that might save you from the 3 AM page.
Engineering Craft
TypeScript, CI/CD, databases, observability -- the skills that make code production-ready.
