Learn how to harden SSH and Access Control Hardening on Ubuntu and openSUSE Linux servers using proven commands, configuration examples, and outputs. Strengthen system security and compliance with best practices for SSH hardening. Key advantages of Access Control Hardening: Comprehensive Access Control Hardening Steps 1. Disable Root Login Root login via SSH is one of the most targeted attack vectors. Disabling root access prevents attackers from brute-forcing the default “root” account. Commands (Ubuntu & openSUSE): Verify: Expected Output: Explanation: This ensures only non-root users can connect. Admins must log in with their personal accounts and use sudo for privileged operations.…