Tutorial on setting up MFA in Ubuntu 18.04 with Google Authenticator app linked to an Android smartphone / tablet. This will add multi-factor auth to your initial login and sudo. Instructions: $ sudo apt install libpam-google-authenticator $ sudo nano /etc/pam.d/common-auth Locate the following line: auth [success=1 default=ignore] pam_unix.so nullok_secure add the following line above: auth required pam_google_authenticator.so echo_verification_code Save changes $ google-authenticator Authenticator App: https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2 Like my channel? Please help support it: Patreon: https://www.patreon.com/quidsup Paypal: https://www.paypal.me/quidsup Follow me on Social Media Google+ https://google.com/+quidsup Twitter: https://twitter.com/quidsup Minds: https://minds.com/quidsup