\section{Daemons}

\begin{frame}
   {Daemons}

   \begin{itemize}

      \item A \textbf{daemon} is a background process whose sole
      purpose is to provide some specific service to users of
      the system.
      \item Can be quite efficient because they only operate
      when needed.
      \item Many are started at boot time.
      \item Names often (but not always) end with \textbf{d}:
      Examples include \textbf{httpd} and \textbf{systemd-udevd}.
      \item May respond to external events (\textbf{systemd-udevd}) or
      elapsed time (\textbf{crond}).
      \item Generally have no controlling terminal and no
      standard input/output devices.
      \item Sometimes provide better security control.
   \end{itemize}

\end{frame}

\cprotect\note{

   A daemon process usually is a background process that
   provides a specific service to users of the system.  It's
   sole purpose on the system is to provide that specific
   service.  Some examples include \textbf{xinetd},
   \textbf{httpd}, \textbf{lpd}, and
   \textbf{vsftpd}.

}
