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\section{Installation of the data reduction pipeline}   The FLOYDS pipeline is a set of python packages based on four main modules:  \emph{pyraf}, \emph{pyfits}, \emph{pylab}, and \emph{numpy}.  It has been tested with python version 2.5,2.6 and 2.7, pyfits (3.0, 3.1), pyraf (1.1, 2.0)  on OS X 10.6,10.7,10.8, centos 6, centos 5, ubuntu 10, but   it can run on almost all operative system as far as there is a running version of $iraf$ on the machine, and a running version of python (version 2.x) with the modules mentioned previously.   The package\footnote{$https://dl.dropboxusercontent.com/u/28579834/floyds-2.1.0.tar.gz$} contains the the following files/directory:  \begin{itemize}  \item \textbf{bin} (directory): this is the directory where executable files are stored.   These files will be copied in the \emph{installation-path} bin directory.   There are three executable files in the bin directory (\textbf{floydsfixheaders}, \textbf{floydsspec}, \textbf{floydsauto} ) that will be explained in detail in Sec~\ref{sec:pipeline}.   \item \textbf{src} (directory): contains the core part of the pipeline   \item \textbf{setup.py} (\emph{distutils} installation script): this is the executable script that should be run to install the FLOYDS pipeline  \item \textbf{README.txt} (file): contains the instructions to install the pipeline  \end{itemize}  To install the pipeline the following steps should be executed:  \begin{itemize}   \item \emph{tar -xvf floyds-version.tar}  \item \emph{cd floyds-version}  \item \emph{python setup.py install}  \end{itemize}  Once the pipeline is installed a new directory, called \emph{floyds},   should have been created in the \emph{PYTHONPATH} directory containing several python files (containing all the functions used in the pipeline) and the following sub directories:  \begin{itemize}   \item \emph{doc}: This directory contains useful documentation on FLOYDS   \item \emph{standard}: This directory contains parameters files (all standard calibration files, tables for arc line identifications, extinction curves, etc.)  \item \emph{archive} This directory contains all the calibration files  used for wavelength calibration, flux calibration. If some  calibrations frames are missing for a specific night, calibrations  are performed using calibrations stored in this directory (using the  frame closest in time to the observations).  \end{itemize}