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Bourne errexit is the most misunderstood line in every devops onboarding doc. Here is what it actually does, step by step, with the rules in the POSIX spec and the bash extensions that contradict them.
Heap corruption that didn't reproduce locally, didn't reproduce in staging, and only manifested in production at exactly 03:14 AM. The story of what we tried, what we missed, and the gdb session that finally explained it.
A practical introduction to io_uring aimed at engineers who have shipped epoll-based event loops in production. What the model is, where it wins, where it doesn't, and the sharp edges nobody mentions in the keynote slides.