\begin{exe} {Shutdown VS. Halt VS. Reboot}

   NOTE: This exercise requires that it be run from the
   console (i.e., not over the network through SSH).

   \begin{enumerate}
      \item Reboot the system using \textbf{shutdown}.
      \item Power off the system using \textbf{shutdown}.
      \item Power the system back up.
   \end{enumerate}

   \begin{sol}

      \begin{enumerate}
         \item
         \begin{cmd}
$ sudo shutdown -r now
         \end{cmd}
         \item
         \begin{cmd}
$ sudo shutdown -h now
         \end{cmd}
         \item
         Press the power button, or restart your virtual
         machine.
      \end{enumerate}
   \end{sol}
\end{exe}



