About Kin4 Notes

Networks, self-hosting, and practical infrastructure.

This publication collects practical material about Linux, networking, TLS, containers, and service operations. Articles focus on small deployments where a clear runbook is more valuable than an abstract enterprise diagram.

Each note aims to include the reasoning behind a change and a way to verify it. That includes unsuccessful approaches when they explain a limitation. The site is static by design: there are no accounts, comments, analytics scripts, or third-party trackers.

Editorial approach

Examples use documentation addresses and example domains where appropriate. Commands are meant to be read before running, especially firewall and upgrade commands. Production checks should include the actual hostname, route, and application protocol.

Corrections and updates

Notes are revised when software behaviour or operational practice changes. The archive keeps the collection navigable, while RSS provides a lightweight way to follow new material.