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# You should also ensure that the grub boot menu is not hidden. Add a hash sign (<code>#</code>) to the start of the line which reads: <code>hiddenmenu</code>
# Save the file and exit. Your Grub boot loader is now password protected.
# Find the section of [http://wwwfedorasolved.linux.com/archiveorg/featurepost-install-solutions/53569 runlevel this article] that explains how to change the runlevel at boot time, and read it. Reboot your system, trying to change to runlevel 1 from the boot prompt, and see if the password protection worked.
# From now on, when you want to change boot parameters when you boot, you must type lowercase <code>p</code> at the boot prompt and enter the required password.