YGG UNDERSTAND·OPEN·IMPROVE

ZDENĚK KUBALA — PERSONAL & PROFESSIONAL HUB

I build
and untangle
systems.

Infrastructure, Linux and open source, automation — and the same thinking applied to public and civic-tech topics. YGG is a place for things solved, understood and verified.

About me → understand·open·improve

01 / WHAT'S HERE

Work Professional profile — systems, infrastructure, integration and the kinds of problems I solve. Public / Civic Public activity, civic tech, digital government and open data.

02 / SELECTED FROM EXPLORE

Selected from Explore

all in explore →
01 GNOME will not start after upgrade: recovering the Wayland session After the Debian 12 → 13 upgrade the login ends on a black screen and the session drops back to GDM. Diagnosis, the actual cause and a permanent fix. troubleshooting · linux
05/202602 ESP32 sensor: from prototype to stable operation From breadboard to a sensor that runs for months untouched: ESPHome firmware, MQTT discovery into Home Assistant, deep sleep + OTA. guide · smart home
04/202603 Cheat sheet: nftables rules for a home network The reference card taped up in my server room — commands, tables and NAT masquerade. reference · networking
03/2026

03 / WORK WITH ME

Dealing with a system that got tangled?
Get in touch.

zdenek.kubala@ygg.cz Professional profile →

Personal and professional knowledge hub of Zdeněk Kubala. Understand. Open. Improve.