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How to Set Up Two-Factor Authentication (2FA/MFA) for SSH on Linux with Google Authenticator

By IT From Zero November 6, 2026

A step-by-step guide to setting up two-factor authentication (2FA/MFA) for SSH on Linux using Google Authenticator with SSH keys, hardening servers against private key leaks.

Security

Mastering Linux PAM: Hardening Passwords and Stopping Brute-force Attacks for Your Server

By IT From Zero June 2, 2026

A guide to upgrading Linux PAM security: Enforcing strong passwords, auto-locking accounts during brute-force attacks, and integrating Multi-Factor Authentication (MFA).