"All these procedures should work exactly the same way with
Fedora and CentOS. As with any rescue environment, it provides a
set of useful tools; it also allows you to configure your network
interfaces. This can be helpful if you have an NFS install tree to
mount, or if you have an RPM that was corrupted and needs to be
replaced. There are LVM tools for manipulating Logical Volumes,
"fdisk" for partitioning devices, and a number of other tools
making up a small but capable toolkit.
"The Red Hat rescue environment provided by the first CD or DVD
can really come in handy in many situations. With it you can solve
boot problems, bypass forgotten GRUB bootloader passwords, replace
corrupted RPMs, and more. I will go over some of the most important
and common issues.
"I also suggest reviewing a password recovery article written by
Suramya Tomar (http://linuxgazette.net/107/tomar.html) that deals
with recovering lost root passwords in a variety of ways for
different distributions. I will not be covering that here since his
article is a very good resource for those problems."