Tech Notes

Tech Notes

Tech tips and new discoveries

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Hardening an OpenWrt Router: SSH, LuCI, RPCD, and the Kernel

Five OpenWrt hardening steps: SSH keys only, forcing HTTPS on LuCI, regenerating the TLS cert, separating LuCI login from the system password, and tightening sysctl.

LinuxHomelabNetworking
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PostgreSQL Scales Further Than Most People Think

How to get more out of a single PostgreSQL instance before you move to a distributed database or a rewrite.

PostgreSQLDatabaseLinux
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How to Upgrade PostgreSQL Without Losing Data

The three ways to upgrade a PostgreSQL major version: pg_dump, pg_upgrade, and logical replication, and the problems you can hit with each one.

PostgreSQLLinuxDocker
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UI APT Mirror - A containerized solution with UI

Notes on a containerized APT mirror I built for working offline: deb packages, an npm cache, and file hosting with a web UI.

LinuxDockerHomelab
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Configuring a wifi access point on ubuntu server with netplan

How to set up a netplan config for a wifi access point on ubuntu server.

UbuntuLinuxHomelab
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