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

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


   %%   \input{init1}
   \input{init2}

\end{Lab}

