[CentOS] md5 passwords?

Sat Jan 12 15:18:29 UTC 2008
Barry Brimer <lists at brimer.org>

> On a C4.4 system, I want to add md5 passwords for the grub boot menu to 
> prevent users from making selections other than the default boot options.
>
> I also want to add md5 passwords when attempting single user mode boots (may 
> be answered by first request).
>
> The same for C5 systems.

<http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/security-guide/s1-wstation-boot-sec.html>