[CentOS] CentOS Live CD for System Rescue - How to get full root access to HD?

Tue Nov 11 13:04:08 UTC 2008
Lanny Marcus <lmmailinglists at gmail.com>

Booting from the CentOS 5.2 Installation DVD (or the first
Installation CD), one can type "linux rescue" and then "chroot
/mnt/sysimage" and have full root access to the OS  on the HD. For
future reference, I would like to know what I did wrong, the past
couple of days, when trying to use the CentOS 5.2 i386 Live CD, for
rescue. From a terminal, "su -" did not seem to get me root access to
the hard drive. What command should I have used, with the Live CD? The
access I had was read only. (As it turns out, I could have fixed the
problem, without the LiveCD, but I didn't know that, 3 days ago....
:-)   )  TIA.  Lanny