Documentation Security Beat
From FedoraProject
halt, poweroff, reboot Configuration Moved
The ability to use halt(8), poweroff(8) and reboot(8) commands by unprivileged users is now controlled using polkit, see the actions in /usr/share/polkit-1/actions/org.freedesktop.login1.policy . The PAM configuration files /etc/pam.d/{halt,poweroff,reboot} are no longer used and their content, if any, is ignored.
