Install Apache Kyuubi on Top of Existing Spark
This guide walks you through setting up Apache Kyuubi on a single-node Ubuntu 24.04 server, running on top of an […]
Apache Kyuubi, Apache Spark
Python
Getting Started with JupyterLab: A Quick Notebook Example for Data Analysis
This quick-start example builds on our previous post about installing JupyterLab on Ubuntu 24.04, where we configured a secure, password-protected
Python
Install JupyterLab on Ubuntu 24.04
Running JupyterLab as a headless server on Ubuntu is perfect for data science, education, or research. In this guide, we’ll
Apache Cassandra, Apache Spark, ThingsBoard
Sync ThingsBoard Time-Series Data from Cassandra to Delta Lake Using Spark SQL
This guide shows how to mirror time-series data stored in ThingsBoard’s Cassandra database into a Delta Lake table using spark-sql.
Apache Spark
Deploy Apache Spark 3.5.6 on a Single-Node Bare Metal Ubuntu 24.04 Server
This guide walks you through deploying Apache Spark 3.5.6 on a single-node Ubuntu 24.04 bare metal server using standalone mode.
ESP32, ThingsBoard
ESP32 Firmware for BLE Wi-Fi Provisioning and Secure MQTT with X.509 Authentication to ThingsBoard
In a previous post, I explained how to secure ThingsBoard using X.509 client certificate authentication and enable auto-provisioning.This post focuses
Smallstep
Deploying Step CA: Your Own Certificate Authority for Internal Services
Managing digital certificates in-house is becoming increasingly important, not just for public HTTPS endpoints, but for securing internal infrastructure, onboarding
IoT, ThingsBoard
IoT Device Lifecycle: ESP32 + BLE Provisioning + ThingsBoard Auto-Provisioning
This post outlines the full lifecycle of an IoT device, from factory assembly to end-user operation, and ownership transfer. Devices
ThingsBoard
Secure ThingsBoard MQTTS with X.509 Certificate Chain and Auto-Provisioning
This guide builds on: to enable: Why We Removed MQTTS from HAProxy In the earlier setup, HAProxy terminated TLS for
ESP32
Provision ESP32 Wi-Fi via BLE
Provisioning Wi-Fi credentials to an ESP32 can be tricky without a screen or keyboard. Thankfully, Espressif provides a simple way