How to Secure an Ubuntu Linux Server for Production Securing a production Linux server is one of the most important responsibilities of a system administrator. A poorly configured server can become an easy target for brute-force attacks, malware, unauthorized access, and service disruption. In this guide, I’ll share essential steps to harden and secure an Ubuntu server for production environments. 1. Update Your Server Regularly Always keep your system packages updated to patch security vulnerabilities. sudo apt update && sudo apt upgrade -y Enter fullscreen mode Exit fullscreen mode You should also remove unused packages: sudo apt autoremove -y Enter fullscreen mode Exit fullscreen mode 2. Create a Non-Root User Avoid using the root user directly for daily administration tasks. Create a new user: sudo adduser adminuser Enter fullscreen mode Exit fullscreen mode Add the user to the sudo group: sudo usermod -aG sudo adminuser Enter fullscreen mode Exit fullscreen mode 3.…