Zariga Tongy's video: configure ubuntu to use two factor ssh

Reference: https://8gwifi.org/docs/ssh1.jsp Install Google Authenicator sudo apt install libpam-google-authenticator Google Authenicator PAM module, add the following line to the /etc/pam.d/sshd auth required pam_google_authenticator.so Modify /etc/ssh/sshd ChallengeResponseAuthentication Yes UsePAM Yes PasswordAuthentication no Now you need to restart the sshd daemon sudo systemctl restart sshd.service Activate the two-factor authentication for a user $ google-authenticator Generate authentication codes and Login with your Verification Code How To Configure Multi-Factor Authentication on Ubuntu 18.04 Two factor (2FA) SSH with Google Authenticator Two-Factor Authentication with SSH on ubuntu Crypto Playground: https://8gwifi.org Linux VM for Practice : https://0cloud0.com Grab 9 book : https://leanpub.com/b/9book Learning: https://8gwifi.org