How to Sync Employee Data from an HR System to OpenLDAP
In most organizations, your HR system is the source of truth for employee identity data. Meanwhile, OpenLDAP is often used […]
OpenLDAP, PostgreSQL, Python
Hands-On DevOps & Homelab Experiments
From Kubernetes and Ceph to Proxmox, Kafka, Jenkins, Vault, Android, and CI/CD, every guide here is a tested, step-by-step walkthrough from my lab.
Email Hosting
How to Set Up Free Email with Zoho Mail and Your Custom Domain Using Cloudflare DNS
Want a professional email like you@your_domain without paying for Gmail or Outlook? With Zoho Mail’s Forever Free Plan, you can
OpenLDAP
Install OpenLDAP on Ubuntu 24.04 with LDAPS via OPNsense HAProxy
In this guide, you’ll learn how to install and configure OpenLDAP on Ubuntu 24.04, and expose it securely using HAProxy
Apache Spark, Python
Analyze ThingsBoard IoT Data in JupyterLab Using PySpark
After filtering and transforming telemetry from ThingsBoard into a clean Delta Lake table, you can begin exploring the data interactively
Apache Spark, Python
Use JupyterLab to Query Delta Lake Tables on a Spark Node
If you’ve already followed my previous guide to install JupyterLab, you might wonder how to use it for working with
Apache Spark, IoT, ThingsBoard
Filter and Transform ThingsBoard IoT Data for Analysis Using Spark SQL
Introduction Once you’ve synced ThingsBoard data into Delta Lake, including both entity data from PostgreSQL and time-series data from Cassandra,
Apache Spark, PostgreSQL, ThingsBoard
Sync ThingsBoard Entity Data from PostgreSQL to Delta Lake Using Spark SQL
This post shows how to keep a Delta Lake table synchronized with a PostgreSQL table using only Spark SQL and
Apache Kyuubi, Apache Spark
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
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