how to setup SSH with Two-Factor Authentication full setup
🔐 Secure your Linux server with SSH + Two-Factor Authentication (2FA) using Google Authenticator! In this step-by-step tutorial, you'll learn how to lock down SSH access with time-based one-time passwords (TOTP) for multiple users.
✅ What you'll learn:
1. How to install the Google Authenticator PAM module
2. How to configure 2FA for individual users
3. How to update PAM and SSH daemon settings
4. How to test and verify secure SSH login
5. How to enforce 2FA for multiple users or specific groups
🛠️ Works with:
Ubuntu / Debian
CentOS / Fedora / RHEL
Google Authenticator, Authy, Microsoft Authenticator
📦 Commands & config files included in Markdown format.
git: https://github.com/itcontents/ssh-2fa
📱 Bonus: QR code scanning, emergency codes, and advanced flags explained!
🎯 Perfect for sysadmins, developers, and anyone serious about Linux security.
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