diff --git a/Advanced Operating Systems - Cheatsheet.pdf b/Advanced Operating Systems - Cheatsheet.pdf
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diff --git a/Advanced Operating Systems - Cheatsheet.tex b/Advanced Operating Systems - Cheatsheet.tex
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+\documentclass[a4paper]{article}
+\usepackage[ngerman]{babel}
+\usepackage[utf8]{inputenc}
+\usepackage{multicol}
+\usepackage{calc}
+\usepackage{ifthen}
+\usepackage[landscape]{geometry}
+\usepackage{amsmath,amsthm,amsfonts,amssymb}
+\usepackage{color,graphicx,overpic}
+\usepackage{xcolor, listings}
+\usepackage[compact]{titlesec} %less space for headers
+\usepackage{mdwlist} %less space for lists
+\usepackage{pdflscape}
+\usepackage{verbatim}
+\usepackage[most]{tcolorbox}
+\usepackage[hidelinks,pdfencoding=auto]{hyperref}
+\usepackage{bussproofs}
+\usepackage{fancyhdr}
+\usepackage{lastpage}
+\pagestyle{fancy}
+\fancyhf{}
+\fancyhead[L]{Advanced Operating Systems}
+\fancyfoot[L]{\thepage/\pageref{LastPage}}
+\renewcommand{\headrulewidth}{0pt} %obere Trennlinie
+\renewcommand{\footrulewidth}{0pt} %untere Trennlinie
+
+\pdfinfo{
+ /Title (Advanced Operating Systems - Cheatsheet)
+ /Creator (TeX)
+ /Producer (pdfTeX 1.40.0)
+ /Author (Robert Jeutter)
+ /Subject ()
+}
+
+%%% Code Listings
+\definecolor{codegreen}{rgb}{0,0.6,0}
+\definecolor{codegray}{rgb}{0.5,0.5,0.5}
+\definecolor{codepurple}{rgb}{0.58,0,0.82}
+\definecolor{backcolour}{rgb}{0.95,0.95,0.92}
+\lstdefinestyle{mystyle}{
+ backgroundcolor=\color{backcolour}, 
+ commentstyle=\color{codegreen},
+ keywordstyle=\color{magenta},
+ numberstyle=\tiny\color{codegray},
+ stringstyle=\color{codepurple},
+ basicstyle=\ttfamily,
+ breakatwhitespace=false, 
+}
+\lstset{style=mystyle, upquote=true}
+
+%textmarker style from colorbox doc
+\tcbset{textmarker/.style={%
+ enhanced,
+ parbox=false,boxrule=0mm,boxsep=0mm,arc=0mm,
+ outer arc=0mm,left=2mm,right=2mm,top=3pt,bottom=3pt,
+ toptitle=1mm,bottomtitle=1mm,oversize}}
+
+% define new colorboxes
+\newtcolorbox{hintBox}{textmarker,
+ borderline west={6pt}{0pt}{yellow},
+ colback=yellow!10!white}
+\newtcolorbox{importantBox}{textmarker,
+ borderline west={6pt}{0pt}{red},
+ colback=red!10!white}
+\newtcolorbox{noteBox}{textmarker,
+ borderline west={3pt}{0pt}{green},
+ colback=green!10!white}
+
+% define commands for easy access
+\renewcommand{\note}[2]{\begin{noteBox} \textbf{#1} #2 \end{noteBox}}
+\newcommand{\warning}[1]{\begin{hintBox} \textbf{Warning:} #1 \end{hintBox}}
+\newcommand{\important}[1]{\begin{importantBox} \textbf{Important:} #1 \end{importantBox}}
+
+% This sets page margins to .5 inch if using letter paper, and to 1cm
+% if using A4 paper. (This probably isn't strictly necessary.)
+% If using another size paper, use default 1cm margins.
+\ifthenelse{\lengthtest { \paperwidth = 11in}}
+ { \geometry{top=.5in,left=.5in,right=.5in,bottom=.5in} }
+ {\ifthenelse{ \lengthtest{ \paperwidth = 297mm}}
+ {\geometry{top=1.3cm,left=1cm,right=1cm,bottom=1.2cm} }
+ {\geometry{top=1.3cm,left=1cm,right=1cm,bottom=1.2cm} }
+ }
+
+% Redefine section commands to use less space
+\makeatletter
+\renewcommand{\section}{\@startsection{section}{1}{0mm}%
+ {-1ex plus -.5ex minus -.2ex}%
+ {0.5ex plus .2ex}%x
+ {\normalfont\large\bfseries}}
+\renewcommand{\subsection}{\@startsection{subsection}{2}{0mm}%
+ {-1explus -.5ex minus -.2ex}%
+ {0.5ex plus .2ex}%
+ {\normalfont\normalsize\bfseries}}
+\renewcommand{\subsubsection}{\@startsection{subsubsection}{3}{0mm}%
+ {-1ex plus -.5ex minus -.2ex}%
+ {1ex plus .2ex}%
+ {\normalfont\small\bfseries}}
+\makeatother
+
+% Don't print section numbers
+\setcounter{secnumdepth}{0}
+
+\setlength{\parindent}{0pt}
+\setlength{\parskip}{0pt plus 0.5ex} 
+% compress space
+\setlength\abovedisplayskip{0pt}
+\setlength{\parskip}{0pt}
+\setlength{\parsep}{0pt}
+\setlength{\topskip}{0pt}
+\setlength{\topsep}{0pt}
+\setlength{\partopsep}{0pt}
+\linespread{0.5}
+\titlespacing{\section}{0pt}{*0}{*0}
+\titlespacing{\subsection}{0pt}{*0}{*0}
+\titlespacing{\subsubsection}{0pt}{*0}{*0}
+
+\begin{document}
+
+\raggedright
+\begin{multicols}{3}\scriptsize
+    % multicol parameters
+    % These lengths are set only within the two main columns
+    %\setlength{\columnseprule}{0.25pt}
+    \setlength{\premulticols}{1pt}
+    \setlength{\postmulticols}{1pt}
+    \setlength{\multicolsep}{1pt}
+    \setlength{\columnsep}{2pt}
+start
+\end{multicols}
+\end{document}
\ No newline at end of file