https://www.malibal.com/guides/how-to-enable-fingerprint-login-on-ubuntu/

Step 1: Check Fingerprint Reader

First, check if your laptop has a fingerprint reader. If not, you will need to purchase an external fingerprint scanner that is compatible with Ubuntu.

Step 2: Open Terminal

Open the terminal by pressing Ctrl + Alt + T on your keyboard or by searching for it in the applications menu.

Step 3: Install Packages

Install the necessary packages by running:

sudo apt install fprintd libpam-fprintdCopyText Copied

Step 4: Enroll Fingerprints

Once the installation is complete, enroll your fingerprints by running:

fprintd-enrollCopyText Copied

Follow the on-screen instructions to enroll your fingerprints. You will need to swipe your finger several times to capture the necessary data.

Step 5: Edit PAM File

Once you have enrolled your fingerprints, edit the PAM configuration file by running:

sudo nano /etc/pam.d/common-authCopyText Copied

This command uses nano. You can use the text editor of your choice. Add the following line to the end of the file:

auth sufficient pam_fprintd.soCopyText Copied

Step 6: Save Changes

Save and exit the file by pressing Ctrl + X, then Y, then Enter, if you used nano. If you used a different text editor then use the appropriate method of saving and exiting the file for that editor.

Step 7: Update PAM

Restart the authentication service by running:

sudo pam-auth-updateCopyText Copied

Step 8: Select Fingerprint Authentication

In the authentication window, select Fingerprint authentication and click on Ok to confirm.

Step 9: Restart Your Computer

Restart your computer and test the fingerprint login by swiping your enrolled finger on the fingerprint reader when prompted.