Duo Unix

Duo Unix adds two-factor authentication to Unix logins.

Login with Duo Unix

When you log in to a system with Duo Unix installed, you will be prompted to complete two-factor authentication after submitting your primary credentials.

Duo Unix Prompt

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. Your login attempt will fail — log in again with one of your new passcodes.

If your Duo administrator has enabled automatic push for this application, you will receive a Duo Mobile login request or phone call automatically.

If your organization requires that you enter a verification code, you'll see it in the output from Duo Unix.

Duo Unix Prompt with Verification Code

Enter the code shown on screen into the Duo Push approval request you receive in Duo Mobile to complete the login process.

Learn more about completing Verified Duo Push authentication on Android or iOS/iPadOS.

Enroll with Duo Unix

If you are a new Duo user and your organization's administrator allows you to self-enroll, the Duo Unix text response will provide an enrollment link:

Duo Unix Enrollment Prompt

Copy this enrollment link into your browser to complete Duo enrollment.

After you complete Duo enrollment, log in again and you'll receive the Duo Unix prompt showing your enrolled Duo authentication methods.