Securing Single User Mode in RHEL6
You have done your RHCE Training and I hope you still remember that how to harden your RHEL6 server.
In case your company security policy requires that your RHEL6 server should prompt for root password even in single user mode you can easily achieve this by editing /etc/sysconfig/init file
and changing SINGLE=/sbin/sushell to SINGLE=/sbin/sulogin
Very small, but a important step in securing single user mode.