BaroPAM solution installation guide for 3-step authentication to strengthen the security of information assets(FreeBSD) 1. Preparation before installing BaroPAM In order to use the PAM module, the PAM package must be installed by default. To verify installation, execute the following command. [root] /root > ls /usr/lib/pam* /usr/lib/pam_chroot.so /usr/lib/pam_ksu.so /usr/lib/pam_radius.so /usr/l..