Install libpam-rsbac by entering the following commands in the terminal:
sudo apt update sudo apt install libpam-rsbac
RSBAC PAM module
RSBAC (Rule Set Based Access Control) is a kernel patch which adds several mandatory access models to the Linux kernel. These models can be used to enhance the security of a Linux system. . This package contains the RSBAC PAM module to use RSBAC User Management.