For additional security, you can require a time-based authentication token as well as a password to log into your Linux PC. This solution uses Google Authenticator and other TOTP apps. This process was performed on Ubuntu 14.
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How to Log In To Your Linux Desktop With Google Authenticator
For additional security, you can require a time-based authentication token as well as a password to log into your Linux PC. This solution uses Google Authenticator and other TOTP apps. This process was performed on Ubuntu 14.
Full article