Duo Unix

The Duo Prompt lets you choose how to authenticate each time you log in.

Type in a passcode — either generated with Duo Mobile, sent via SMS, generated by your hardware token, or provided by an administrator — or choose another authentication option.

Option	Description
Duo Push	Pushes a login request to your phone (if you have Duo Mobile installed and activated on your iOS or Android device). Just review the request and tap "Approve" to log in.
Phone call	Authenticate via phone callback.
SMS passcodes	Get a new batch of SMS passcodes.