Artificial Intelligence has moved beyond simple assistance and is now actively shaping how software is designed, developed, and maintained. Among the most impactful tools in this space are OpenAI Codex and Claude Code. While both tools are powerful, they serve different purposes and operate with different philosophies. Understanding these differences is critical for making the…
Certified AIOps Professional Program A Guide to Career Growth
Introduction In the modern IT world, managing complex systems requires more than just manual effort. The Certified AIOps Professional program is designed to help engineers use artificial intelligence and machine learning to improve IT operations. This guide is built for software engineers, SREs, and IT managers who want to understand how to move from traditional…
Keycloak Multi-Client Architecture with Project-Based Email Validation (Student, Trainer, Company, Consulting)
When building a platform like DevOpsSchool with multiple user types such as students, trainers, companies, and consulting firms, one of the biggest challenges is handling authentication and registration rules properly. You don’t just want users to sign up — you want: This tutorial explains how to achieve all of this using Keycloak, following best practices…
Incorrect definition of table mysql.column_stats
If you are running a Laravel, PHP, or any backend application and suddenly your MySQL or MariaDB server starts throwing errors like: Incorrect definition of table mysql.column_stats: expected column ‘min_value’ to have type varbinary(255), found varchar(255) then you are dealing with a system-level database issue, not an application bug. This problem is very common in:…
Mautic and PHP 8.3 Compatibility Guide (2026)
If you are planning to run Mautic on PHP 8.3, you are already moving in the right direction. Modern servers like Ubuntu 24 come with PHP 8.3 by default, and performance improvements are significant. However, many developers face confusion because not all Mautic versions support PHP 8.3, and upgrading without proper understanding can break your…
Certified AIOps Engineer: The Complete Career Path and Certification Guide
Introduction The transition from traditional monitoring to intelligent observability is no longer a luxury but a necessity for modern enterprises. The Certified AIOps Engineer program is designed to bridge the gap between legacy operations and AI-driven automation. This guide is curated for engineers, architects, and technical leaders who aim to master the art of using…
How to Rename Apache Virtual Host Files Safely (Step-by-Step Guide for Linux)
Managing Apache configuration is a common task when running websites on a Linux server. One of the most frequent requirements is renaming virtual host configuration files without breaking the live website. In this guide, you will learn how to safely rename Apache .conf and -ssl.conf files, along with all the important concepts, mistakes to avoid,…
AIOps Foundation Certification: Everything You Need to Know to Get Certified
Introduction The AIOps Foundation Certification is a professional credential designed to bridge the gap between traditional IT operations and the era of artificial intelligence. As systems grow in complexity, manual intervention is no longer sufficient to maintain uptime and performance. This guide serves as a roadmap for engineers and managers looking to understand how algorithmic…
DevOps to Certified Site Reliability Professional: A Senior Mentor’s Guide
The landscape of modern software delivery has shifted from simple deployment to the continuous management of complex, distributed systems. As organizations move toward cloud-native architectures, the role of reliability has become the cornerstone of business success. This guide is designed for engineers and technical leaders who want to master the art of keeping systems fast,…
Certified Site Reliability Manager Training, Preparation, and Career Mapping
The Certified Site Reliability Manager is a professional designation designed to bridge the gap between traditional management and modern reliability engineering. This guide is built for professionals who want to lead SRE teams, manage production risks, and implement SLO-driven cultures. Whether you are a senior engineer transitioning to leadership or an existing manager looking to…