Eduardo Alemán’s Blog

Markup Languages: Differences, Uses, and Conversions Between XML, Markdown, and HTML Markup languages are essential for structuring, organizing, and rendering information in digital environments. The most commonly used are XML, Markdown, and HTML, each with distinct goals and characteristics. This article compares their main uses, conceptual and technical differences, and the common issues faced when converting between them. 1. What is XML? XML (eXtensible Markup Language) is designed to store, transport, and structure data in a hierarchical and extensible format. Its syntax is strict, and it focuses on structure rather than presentation. …

Important Note A Nano node stores the entire ledger of transactions. While the Nano team is experimenting with pruning (removing historical data to reduce disk space), the primary way to manage storage for a Nano node is by ensuring you have enough space available on your SSD-based hard drive. Current Storage Requirements Principal Representative Nodes (more than 0.1% of online voting weight): Require 400GB+ of free space on an SSD. …

Hardening an Ubuntu server is a critical practice to protect any infrastructure exposed to the internet. Below are key steps to strengthen security, including a summary table of each configuration and its effect. 🔐 Step 1: Create a secure user and use SSH keys Disabling direct access to the root user and using a limited user with SSH keys improves traceability and removes one of the most common attack vectors. …