Install libpam-u2f by entering the following commands in the terminal:
sudo apt update sudo apt install libpam-u2f
universal 2nd factor (U2F) PAM module
Universal 2nd Factor (U2F) is an authentication mechanism that strengthen other authentications, and through this PAM module it can be used to require a U2F device in order to authenticate. . This package contains the PAM module, which performs the U2F Authentication step. Before this, you need to perform the U2F Registration step which can be completed using the pamu2fcfg package.