How to Generate Two-Factor Authentication Code from Your Linux Desktop

1. How do I get a two-factor authentication code?
2. How do I get my authenticator code?
3. What do I do if I forgot my two-factor authentication?
4. How do I install Google Authenticator on Linux?
5. How do I get my old Google Authenticator code on my new phone?
6. How do I set up authenticator on my new phone?
7. Did Google not request verification code?
8. How do I get my Microsoft authenticator code?
9. How do I restore my authenticator app?
10. Can you bypass two-factor authentication?
11. How does two-factor authentication work if you lose your phone?
12. How do I restore Google Authenticator if I lost my phone?

How do I get a two-factor authentication code?

Protect your account with 2-Step Verification

1. Open your Google Account.
2. In the navigation panel, select Security.
3. Under “Signing in to Google,” select 2-Step Verification. Get started.
4. Follow the on-screen steps.

How do I get my authenticator code?

Setup

1. From your favorite browser, open the Google account security page.
2. Click on “2-Step Verification”
3. Under the Authenticator App section, click “Setup”
4. Choose your device type (Android, iPhone) and click “Next” to reveal a QR code.
5. Open the Authenticator app on your device.
6. Tap on “BEGIN SETUP”

What do I do if I forgot my two-factor authentication?

If you lost your second authentication factor: Google Account. ... As an example, you can generate a new set of backup codes to allow you sign in to your Google Account instantly on a new Android phone, which will then become your secondary authentication factor.

How do I install Google Authenticator on Linux?

Log into your Linux machine and follow these steps:

1. Open a terminal window.
2. Issue the command sudo apt install libpam-google-authenticator.
3. Type your sudo password and hit Enter.
4. If prompted, type y and hit Enter.
5. Allow the installation to complete.

How do I get my old Google Authenticator code on my new phone?

Transfer your Authenticator keys via Android

1. Open Google Authenticator on your older phone.
2. Tap on the three dots on the top right of the screen and select “Transfer accounts”
3. Select “Export accounts.” You may be asked to verify your identity via a fingerprint, password, or another method.

How do I set up authenticator on my new phone?

The old school way still works

1. Install Authenticator on your new phone.
2. On your computer, visit Google's two-step verification site and log in to your Google account. ...
3. Click Change Phone in the Authenticator app section. ...
4. Open the Authenticator app on your new phone and tap Begin > Scan barcode.

Did Google not request verification code?

Google verification code is sent when someone is trying to access your Google Account and you have set 2FA using this verification code. If you are sure you never requested the verification code, that could mean someone has tried to login to your account using your email and password.

How do I get my Microsoft authenticator code?

Add account to Microsoft Authenticator

1. Open the Microsoft Authenticator app on your phone.
2. Tap the + > Work or school account.
3. Use your phone to scan the QR square that is on your computer screen. Notes: ...
4. Your account will be added automatically to the app and will display a six-digit code.

How do I restore my authenticator app?

On your mobile device, open the Microsoft Authenticator app, and select Begin recovery from the bottom of the screen. Sign in to your recovery account, using the same personal Microsoft account you used during the backup process. Your account credentials are recovered to the new device.

Can you bypass two-factor authentication?

Bypassing 2FA using brute force

When the length of the two-factor authentication code is four to six characters (often just numbers), it makes it possible for attackers to bypass 2FA by using brute-force against the account.

How does two-factor authentication work if you lose your phone?

If you didn't save your backup codes, and you've lost the phone that you use for 2FA – try calling your phone network to transfer your old number over to a new phone. You'll need a new SIM card for that, and it could take a day or two for it to activate.

How do I restore Google Authenticator if I lost my phone?

Use backup options

If you've lost access to your primary phone, you can verify it's you with: Another phone signed in to your Google Account. Another phone number you've added in the 2-Step Verification section of your Google Account. A backup code you previously saved.