Every Linux server has a filesystem. Most engineers picked ext4 because it was the default and never thought about it again. The choice matters more than you'd guess: filesystems differ in journal behavior, max sizes, snapshot support, fsync latency, scrub capabilities, and how gracefully they handle crashes. Here's the working knowledge for picking the right one and tuning it for real workloads.
Engineering Craft
TypeScript, CI/CD, databases, observability -- the skills that make code production-ready.
