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Protect your Linux system from hackers, malware, and online threats with simple, proven steps. This is the complete story of how I built it, what I learned, and how you can build it too. This project contains a Bash script that automates the security audit and hardening process for Linux servers. GitHub Gist: instantly share code, notes, and snippets. Disables root login, enforces key-based authentication, restricts forwarding, and sets strict connection parameters for Linux hardening guide with copy-paste commands for Ubuntu, CentOS, and Rocky. This script automates the scanning process using the OpenSCAP Security Guid to hardening Ubuntu systems, aligning with DISA-STIG compliance for Ubuntu 24. While these 50 Linux server security hardening tips offer a robust foundation for safeguarding your server, you can further enhance your server's Hardening refers to the process of securing a system by reducing its attack surface, mitigating risks, and enhancing overall security posture. 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