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Field notes from real systems
Written from problems met on real projects, with commands and examples to follow. Pick a topic.
3 articles
New server? Lock down SSH in 7 steps
Right after you get a fresh Ubuntu server - keys instead of passwords, no root login, a firewall, fail2ban and auto-updates, plus the trap most people fall into.
3 min readYour cameras and IoT devices get a new IP after every reboot. Here is the fix
Why cameras, printers and ESP32 boards come back with a new address after a power cycle, and four fixes, from a router reservation to automatic discovery.
2 min readWhat is an AI agent, and how is it different from a chatbot?
AI agents in plain words. How they work in a loop, what tools they can use, which jobs suit them, and the risks to control before you let one touch a real system.
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