\clearpage\section{Labs}\begin{Lab}

   \ifINSTRUCTORLED
      \begin{videobox}
         \begin{alltt}
    \reslink{using_linux_distros_demo.mp4}
    \reslink{using_disk_usage_demo.mp4}  \end{alltt}
      \end{videobox}
   \fi

   \input{fslayout1}
   \input{fslayout2}
\end{Lab}

