Linux Server Hardening Online

Below is a structured write-up covering the essential stages of a Linux hardening project. 1. Update and Patch Management

Linux server hardening is the process of reducing a system's attack surface to protect against unauthorized access and data breaches. A default Linux installation is often a "blank canvas" rather than a fortress; hardening provides the necessary reinforcement. Linux Server Hardening

Disable password-based authentication ( PasswordAuthentication no ) in favor of SSH key-pair authentication . Below is a structured write-up covering the essential

Configure automatic security updates using tools like unattended-upgrades on Debian/Ubuntu or dnf-automatic on RHEL/Fedora. 2. Secure Access (SSH Hardening) Linux Server Hardening

The most critical step is ensuring all software is current to close known vulnerabilities.

Follow the principle of least privilege to limit what users and services can do.