\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{mahdi007}
\pdfinfo{
  /Title (systeme-d-exploitation.pdf)
  /Creator (Cheatography)
  /Author (mahdi007)
  /Subject (Système d'exploitation Cheat Sheet)
}

% Lengths and widths
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\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
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\definecolor{FootBackground}{HTML}{666666}
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\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Système d'exploitation Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{mahdi007} via \textcolor{DarkBackground}{\uline{cheatography.com/139761/cs/29579/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}mahdi007 \\
  \uline{cheatography.com/mahdi007} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 27th October, 2021.\\
   Updated 31st October, 2021.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{x{1.6 cm} x{6.4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Abbreviations}}  \tn
% Row 0
\SetRowColor{LightBackground}
\seqsplit{FCFS/FIFO} & First Come First Served/ First In First Out \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
SJF & Shortest Job First \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
SNRT & Shortest Next Remaining Time \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
RR & Round Robin \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
MMU & Memory Management Unit \tn 
% Row Count 6 (+ 1)
% Row 5
\SetRowColor{white}
UCT/CPU & Unité Centrale de Traitement \tn 
% Row Count 7 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\seqsplit{(B/W/F/N)F} & (Best/Worst/First/Next) Fit \tn 
% Row Count 9 (+ 2)
% Row 7
\SetRowColor{white}
LRU & Last Recently Used \tn 
% Row Count 10 (+ 1)
% Row 8
\SetRowColor{LightBackground}
NRU & Not Recently Used \tn 
% Row Count 11 (+ 1)
% Row 9
\SetRowColor{white}
SSTF & Shortest Seek Time First \tn 
% Row Count 12 (+ 1)
% Row 10
\SetRowColor{LightBackground}
PCB & Process Control Block \tn 
% Row Count 13 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Process life-cycle}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{p{8.4cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/mahdi007_1635349195_Screenshot 2021-10-26 165545.png}}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Glossary}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Thread}} & Une file d'instruction appartenant à un processus. Les différentes threads exécutent en parallèle. Chaque Thread possède un état d'exécution, pile d'exécution, espace privée de variables locales. ça sert à ne pas laisser une partie du programme planté, bloquer l'exécution des autres parties. \tn 
% Row Count 16 (+ 16)
% Row 1
\SetRowColor{white}
{\bf{Ordonnaceur à court terme}} & gestion des processus prets: selection du processus à executer \tn 
% Row Count 20 (+ 4)
% Row 2
\SetRowColor{LightBackground}
{\bf{Dispatcher}} & donne le controle au processus choisi par le Scheduler \tn 
% Row Count 23 (+ 3)
% Row 3
\SetRowColor{white}
{\bf{Ordonnanceur à moyen terme}} & gestion des SWAP IN/OUT \tn 
% Row Count 25 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{Ordonnanceur à court terme}} & gestion des nouveaux processus (de l'état nouveau à pret) \tn 
% Row Count 28 (+ 3)
% Row 5
\SetRowColor{white}
{\bf{temps de traitement/temps de rotation}} & temps de vie du processus \tn 
% Row Count 31 (+ 3)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Glossary (cont)}}  \tn
% Row 6
\SetRowColor{LightBackground}
{\bf{temps d'execution/burst time}} & le temps CPU pris par ce processus \tn 
% Row Count 2 (+ 2)
% Row 7
\SetRowColor{white}
{\bf{temps d'attente/ wait time}} & temps passé en fil d'attente \tn 
% Row Count 4 (+ 2)
% Row 8
\SetRowColor{LightBackground}
{\bf{temps de repoense}} & temps entre la date d'arrivée et la premeiere prise du CPU \tn 
% Row Count 7 (+ 3)
% Row 9
\SetRowColor{white}
{\bf{famine}} & un processus reste toujours (ou pour une très longue durée) en attente \tn 
% Row Count 11 (+ 4)
% Row 10
\SetRowColor{LightBackground}
{\bf{fragmentation interne}} & espace memoire libre dans les partitions \tn 
% Row Count 13 (+ 2)
% Row 11
\SetRowColor{white}
{\bf{fragmentation externe}} & espace memoire libre entre les espaces alloué (tellement petits qu'il est insuffisant pour tout processus) \tn 
% Row Count 19 (+ 6)
% Row 12
\SetRowColor{LightBackground}
{\bf{table de page}} & contient pour chaque page du processus la page de memoire correspondante + un bit de présence \tn 
% Row Count 24 (+ 5)
% Row 13
\SetRowColor{white}
{\bf{table de segment}} & contient l'adresse de base + la longueur du segment + infos de protection pour chaque segment du programme \tn 
% Row Count 30 (+ 6)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Glossary (cont)}}  \tn
% Row 14
\SetRowColor{LightBackground}
{\bf{seek time}} & temps pris par l'unité disque pour s'alligner avec le disque désiré \tn 
% Row Count 4 (+ 4)
% Row 15
\SetRowColor{white}
{\bf{Scan}} & l'oiel fait un balayage de tout le disque du cylindre 0 à n.  en allée et en retour \tn 
% Row Count 9 (+ 5)
% Row 16
\SetRowColor{LightBackground}
{\bf{look}} & comme scan mais en se limitant à l'extreme requette dans tout les sens \tn 
% Row Count 13 (+ 4)
% Row 17
\SetRowColor{white}
{\bf{C-LOOK/C-SCAN}} & comme look et scan mais dans un seul sens (à l'arrivé à l'extreme on fait un retour rapide sans balayage au 0 ou l'extreme \tn 
% Row Count 20 (+ 7)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}