What is SSH, and how does it work?
SSH is an encrypted channel to a remote server. Learn the client and server model, port 22, host key fingerprints, and key versus password login.
#fundamentals
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What is DNS? A server owner's guide
DNS decides whether your domain reaches your VPS. Learn the records, nameservers, TTL and the caching that makes a DNS change look like it failed.
The types of AI agents, explained
Simple reflex, goal-based, utility-based, learning, multi-agent: what each type of AI agent is for, and which ones you can honestly self-host.