Introduction While setting up Container1 inside an OpenVZ container, I encountered the following error: ls: cannot access /dev/net/tun: No such file or directory This occurs when the TUN/TAP device is not enabled for the container. Since many networking applications rely on /dev/net/tun to create virtual network interfaces, its absence can… Continue Reading Fixing the /dev/net/tun Error in an OpenVZ Container

Introduction In environments where application servers and database servers communicate over a private network, configuring MySQL to listen on a private IP address improves security and reduces exposure to public networks. This approach ensures that database connections are restricted to trusted internal systems while maintaining application connectivity. This guide outlines… Continue Reading Configuring MySQL to Listen on a Private IP Address

Introduction Liquibase is an open-source database change management tool used to track, version, and deploy database schema changes in a structured and controlled way. It is commonly used in DevOps pipelines and CI/CD workflows (Jenkins, GitLab, ArgoCD) to ensure database consistency across development, testing, and production environments. Prerequisites Before installing… Continue Reading Liquibase Installation on Ubuntu 24

Introduction: In Ubuntu 24.04, administrators can temporarily disable or re-enable user access using command-line tools. Locking a user prevents password-based logins without deleting the account or its files. Prerequisites Before proceeding, ensure the following requirements are met: Implementation Use the following command to lock a user account: Command: $ sudo… Continue Reading How to Lock and Unlock a User on Ubuntu 24.04?

Have you ever opened a website and mobile app for the same service and noticed they show different information? Maybe a pass appears on one but not the other, or a session looks available in one place but not elsewhere. These inconsistencies confuse users and slowly reduce trust in the… Continue Reading Resolving App and Website Data Inconsistencies

Introduction Managing external access to applications in Kubernetes can feel complex—especially when you want secure HTTPS connections. Fortunately, Kubernetes provides a powerful combination of Ingress and automatic SSL certificate management using tools like NGINX Ingress Controller and Cert-Manager. In this guide, you’ll learn how to: Architecture Overview Before we begin,… Continue Reading How to Configure Kubernetes Ingress with Automatic SSL Certificates (Without Helm)

Introduction Plesk is a powerful web hosting control panel used to manage websites, domains, databases, emails, and servers through a user-friendly interface. It supports multiple operating systems and simplifies server administration for developers and system administrators. Prerequisites Before installing Plesk, ensure the following requirements are met: Implementation Follow these steps… Continue Reading How to Install Plesk on a Linux Server