\begin{exe} {Recovering from Password Failure}

   \begin{enumerate}
      \item
      As root (not with \textbf{sudo}), change the root
      password. We will pretend we don't know what the new
      password is.
      \item
      Log out and try to login again as root using the old
      password.  Obviously you will fail.
      \item
      Boot using the rescue media, and select \verb?Rescue?
      when given the option.  Let it mount filesystems and then
      go to a command line shell.
      \item
      Go into your \textbf{chroot}-ed environment (so you
      have normal access to your systems):
      \begin{cmd}
$ chroot /mnt/sysimage
      \end{cmd}
      and reset the root password back to its original value.
      \item
      Exit, remove the rescue media, and reboot, you should
      be able to login normally now.
   \end{enumerate}
\end{exe}

