\documentclass[]{article}
\usepackage{alltt}
\usepackage{cc_manual}
\usepackage{amssymb}
\usepackage{epsf}
\usepackage{ipe}
\usepackage{path}
\textwidth 15.6cm 
\textheight 23cm
\topmargin -14mm       
\evensidemargin 3mm 
\oddsidemargin 3mm
\headsep 1cm
\parindent 0em
\setlength{\parskip}{1ex minus 0.9ex}

\begin{document}

\input{installation}

\end{document}