Technical Reference

Notes

Short-form technical notes, commands, references, concepts, and reminders collected while studying and troubleshooting.

systemd Service Basics

Quick reference notes for inspecting, starting, stopping, enabling, and troubleshooting systemd services.

  • Linux
  • systemd

DNS Troubleshooting Checklist

A short checklist for separating name resolution problems from routing, connectivity, and application issues.

  • DNS
  • Networking