How To: CentOS Two-factor SSH and Virtualmin Authentication via Google-Authenticator

This is my guide to setting up Two-factor SSH and Virtualmin Authentication via Google-Authenticator on CentOS. What is Google Authenticatorcode.google.com/p/google-authenticator/ OverviewThe Google Authenticator project includes implementations of one-time passcode generators for several mobile platforms, as well as a pluggable authentication…