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David Cao

David is a Cloud & DevOps Enthusiast. He has years of experience as a Linux engineer. He had working experience in AMD, EMC. He likes Linux, Python, bash, and more. He is a technical blogger and a Software Engineer. He enjoys sharing his learning and contributing to open-source.

The Best Linux Distribution to Learn for a Career in 2026

If you’re learning Linux to get a job, here’s the honest answer: learn Ubuntu or a Red Hat–compatible distro like Rocky Linux or AlmaLinux. Ideally, learn both. That isn’t because the other distributions are bad. It’s because nearly every Linux job you’ll apply…

Understanding Subqueries in PostgreSQL

Subqueries, also known as nested queries, are queries embedded within other SQL queries. In PostgreSQL, subqueries are a powerful tool to help filter, manipulate, and aggregate data dynamically. They allow you to perform complex data retrieval operations without the need…

How to View Access Privileges in PostgreSQL

In PostgreSQL, managing access privileges is an essential part of database administration, especially in multi-user environments. One of the most useful commands for viewing and managing access privileges for database objects (such as tables, views, sequences, etc.) is the \dp…

How Accurate is ChatGPT? A Comprehensive Analysis

As artificial intelligence (AI) continues to evolve, one of the most groundbreaking advancements in natural language processing (NLP) has been the development of ChatGPT by OpenAI. This AI model, based on the GPT (Generative Pre-trained Transformer) architecture, has become a…

ChatGPT for Content Creation: A Comprehensive Guide

In recent years, AI-powered tools have revolutionized the world of content creation. One of the most exciting and versatile technologies in this space is ChatGPT, developed by OpenAI. Leveraging advanced natural language processing (NLP), ChatGPT can generate human-like text based…