Engineering field notes
Tested guides for Linux, cloud, containers, and self-hosted services.
Evaluate device growth and licensing before upgrading ThingsBoard CE 4.3 to 4.4. Follow the Community Grant and Ubuntu upgrade process, or keep using Apache-licensed CE 4.3.
Boot the Ubuntu installer on a target machine using MikroTik DHCP and an Ubuntu boot server that provides TFTP boot files and read-only NFS installation media.
Build a local RAG index from one structural design code PDF, search it with Qwen3-Embedding-0.6B and Qdrant, and let Codex answer from visible excerpts with PDF page references.
Follow a simulated RC office from architectural requirements through OpenSees analysis, coordination feedback, and a scoped reinforcement drawing, with AI assisting each stage.
Issue a Let’s Encrypt certificate with Cloudflare DNS-01 on Ubuntu, import it through Synology DSM, and optionally automate renewal with restricted SSH delivery and a DSM-side worker.
Install MeshCentral on Ubuntu 26.04 as a systemd service with direct HTTPS, then use Cloudflare DNS-01 for Let’s Encrypt certificate issuance and renewal in an internal-only deployment.
Restore a Veeam Agent backup of Windows Server 2016 to an isolated KVM virtual machine and verify that it boots. Includes a conditional StorAHCI recovery procedure for boot-device errors.
Back up a running Windows Server 2016 machine to a Synology NAS over SMB with Veeam Agent. Create recovery media and configure an entire-computer backup with a daily schedule and incremental restore points.
Prepare a Google Drive access token for Playwright tests of a browser-side application. Reuse an authorized refresh token and inject the access token into the app before running the tests.
Trace a Zabbix database socket error after unattended-upgrade to a blocked service restart. Follow the recovery steps and systemd timeout configuration for the Ubuntu 26.04, Zabbix 7.4, and MariaDB 11.8 setup.
