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I forgot how to manage a server
Something embarrassing happened to me the other day. I was playing around with a new server on Digital Ocean and it occurred to me: I had no idea how to manage …
Mattias Geniar
Mattias Geniar, co-founder of Oh Dear. A decade of writing on Linux, PHP, DevOps, web performance, security and the open web, plus talks and projects.
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Visit ma.ttias.be → RSS feedOn Hacker News Jan 2015 – Jan 2026
Web & Frontend 9Security & Privacy 5Networking & Internet 4Software Engineering 3Infrastructure & DevOps 3Systems & Performance 2
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What is a 'unikernel'?
Learn what unikernels are, how they remove OS bloat between hardware and applications, and why they're gaining traction in cloud and microservices.
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Varnish Explained
Complete guide to Varnish cache: HTTP headers, VCL configuration, cache invalidation, ESI, and practical setup. Video, slides & real-world examples.