YAANG / NOTES

Technical records from the field.

Browse by system and topic. Every article states its tested environment, difficulty, risk and last verified date.

3 notes

01 Servers & networking · 2026-07-22 · 3 min read From DNS to HTTPS: Deploying a Verifiable Nginx Site on Ubuntu 24.04 Connect DNS, IPv4/IPv6, Nginx, TLS and external validation across one complete request path—and preserve a clear rollback when a layer fails. NginxUbuntuDNSIPv6SSL

02 Operations · 2026-07-18 · 3 min read When a Service Won't Open, Don't Reinstall Yet Timeouts, refused connections, TLS errors and gateway failures indicate different breakpoints. Follow one repeatable path from client and DNS to proxy and application. TroubleshootingNetworkingNginxLinux

03 AI & development · 2026-07-12 · 3 min read Local Model, API, or Agent: Six Decisions Before Building an AI Workflow Start AI architecture with the task, data, hardware, permissions, failure modes and maintenance—not with a model name. AI AgentLocal LLMAPIAutomation