Install libpam-ssh by entering the following commands in the terminal:
sudo apt update sudo apt install libpam-ssh
Description:
Authenticate using SSH keys
This pluggable authentication module (PAM) provides single sign-on using secure shell (SSH) keys: - during authentication, the user types a SSH passphrase and is authenticated if the passphrase successfully decrypts the user's SSH private keys; - in session phase, a ssh-agent process is started and decrypted keys are added, and thus the user can SSH to other hosts that accept key authentication without typing more passwords for the entire session.
Homepage: http://pam-ssh.sourceforge.net
Version: 2.1+ds1-2
Section: universe/admin