\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{Soseh (Anahit)}
\pdfinfo{
  /Title (iot-course.pdf)
  /Creator (Cheatography)
  /Author (Soseh (Anahit))
  /Subject (IoT Course Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\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
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{1528A3}
\definecolor{LightBackground}{HTML}{F0F1F9}
\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{IoT Course Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Soseh (Anahit)} via \textcolor{DarkBackground}{\uline{cheatography.com/33570/cs/10462/}}}
\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}Soseh (Anahit) \\
  \uline{cheatography.com/anahit} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 9th January, 2017.\\
   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*}{3}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{DragonBoard 410c Components}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{eMMC}}: Embedded Multimedia Card \newline % Row Count 1 (+ 1)
{\bf{RAM}}: random Access Memory \newline % Row Count 2 (+ 1)
{\bf{WiFi}}: Brandin Term that beat out IEEE 802.11 \newline % Row Count 3 (+ 1)
{\bf{GPS}}: Global Positioning System \newline % Row Count 4 (+ 1)
{\bf{ARM}}: Advanced RISC Machine \newline % Row Count 5 (+ 1)
{\bf{RISC}}: Reduced Instruction Set Computer% Row Count 6 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Embedded Systems}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{- {\bf{SoC}} \newline % Row Count 1 (+ 1)
- {\bf{SoM}} \newline % Row Count 2 (+ 1)
- {\bf{...}}% Row Count 3 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Concepts}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{High and Low Level programming}} \newline % Row Count 1 (+ 1)
{\bf{Object oriented Programming}} \newline % Row Count 2 (+ 1)
{\bf{C Programming}} \newline % Row Count 3 (+ 1)
{\bf{Root/Superuser}} \newline % Row Count 4 (+ 1)
{\bf{Levels of Abstraction}}% Row Count 5 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.53827 cm} x{2.43873 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{High Level/ Low Level Programming}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{High Level}} & {\bf{Low Level}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Easier to user & Harder to use \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Many abstractions & Fewer abstractions \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
Automated Processes & Closer to hardware \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
 & Efficient \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Unix Terminal Commands}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{ls}}- Lists the contents of the current directory \newline % Row Count 2 (+ 2)
{\bf{cd}}- Change directory \newline % Row Count 3 (+ 1)
{\bf{echo}}- Prints/calls something out to the terminal \newline % Row Count 5 (+ 2)
{\bf{cat}}- Outputs contents of a file to somewhere else \newline % Row Count 7 (+ 2)
{\bf{export}}- Creates a path variable \newline % Row Count 8 (+ 1)
{\bf{sudo}}- Executes a command as a superuser \newline % Row Count 9 (+ 1)
{\bf{(sudo) su}}- Enter superuser mode \newline % Row Count 10 (+ 1)
{\bf{chmod}}- Changes files permissions (Read, Write, Execute) \newline % Row Count 12 (+ 2)
{\bf{exit/quit}}- Exit/quit current mode \newline % Row Count 13 (+ 1)
{\bf{.}}- Current directory \newline % Row Count 14 (+ 1)
{\bf{:}}- Parent Directory \newline % Row Count 15 (+ 1)
{\bf{./}}- Executes Files \newline % Row Count 16 (+ 1)
{\bf{Other Commands}} \newline % Row Count 17 (+ 1)
{\bf{mkdir}}- Create a new folder \newline % Row Count 18 (+ 1)
{\bf{mv}}- Move a file to another location \newline % Row Count 19 (+ 1)
{\bf{cp}}- Copy a file to another location \newline % Row Count 20 (+ 1)
{\bf{rm}}- Remove a file \newline % Row Count 21 (+ 1)
{\bf{clear}}- Clears the terminal \newline % Row Count 22 (+ 1)
{\bf{!!}}- Repeat a command% Row Count 23 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{General Acronyms}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{IoT}}: Internet of Things \newline % Row Count 1 (+ 1)
{\bf{OS}}: Operating System \newline % Row Count 2 (+ 1)
{\bf{IDE}}: Integrated Development Environment \newline % Row Count 3 (+ 1)
{\bf{SDK}}: Software Development Kit \newline % Row Count 4 (+ 1)
{\bf{NDK}}: Native Development Kit \newline % Row Count 5 (+ 1)
{\bf{AVD}}: Android Virtual Device \newline % Row Count 6 (+ 1)
{\bf{ADB}}: Android Debug Bridge \newline % Row Count 7 (+ 1)
{\bf{APK}}: Android Application Package \newline % Row Count 8 (+ 1)
{\bf{API}}: Application Programming Interface% Row Count 9 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.23965 cm} x{2.73735 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Object-Oriented Programming}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Advantages}} & {\bf{Disadvantages}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Code Reuse/ recycling & Size (very large programs) \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
Encapsulation & Slower than other programs \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{Design Benefits} \tn 
% Row Count 6 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Root / Super user}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{- Use "sudo su" or "su" to log in to superuser \newline % Row Count 1 (+ 1)
- Uses "sudo" for every command \newline % Row Count 2 (+ 1)
- Gives suer all rights/ permissions to all programs/ files \newline % Row Count 4 (+ 2)
- Modify files that cannot be modified as a regular user \newline % Row Count 6 (+ 2)
- Issue commands that cannot be used as a regular user \newline % Row Count 8 (+ 2)
- Can be dangerous / make sure you know what you are doing% Row Count 10 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{MS- DOS Commands}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{dir}}- Displays the contents of the directory/folder \newline % Row Count 2 (+ 2)
{\bf{cls}}- Clears the skin \newline % Row Count 3 (+ 1)
{\bf{copy}}- Copies one or more files to the specified destination \newline % Row Count 5 (+ 2)
{\bf{echo}}- Prints/ Calls something to the terminal \newline % Row Count 6 (+ 1)
{\bf{del}}- Deletes a file \newline % Row Count 7 (+ 1)
{\bf{undelete}}- Restores a deleted file \newline % Row Count 8 (+ 1)
{\bf{print}}- Prints the content of a text file \newline % Row Count 9 (+ 1)
{\bf{mkdir}}- Make a new folder% Row Count 10 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Frequent Terminology}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{Board}}: the DragonBoard 410c \newline % Row Count 1 (+ 1)
{\bf{Boot}}: starting your board \newline % Row Count 2 (+ 1)
{\bf{Terminal}}: A shell/command line \newline % Row Count 3 (+ 1)
{\bf{Android Studio}}: An IDE for developing Android applications \newline % Row Count 5 (+ 2)
{\bf{Dip Switches}}: Boot switches on back of board \newline % Row Count 6 (+ 1)
{\bf{Script}}: An executable file (automates a process) \newline % Row Count 8 (+ 2)
{\bf{Fastboot}}: A method to install an OS using a USB and a computer \newline % Row Count 10 (+ 2)
{\bf{Flashing}}: Overwriting existing OS or firmware% Row Count 11 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.18988 cm} x{2.78712 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{C Programming}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Advantages}} & {\bf{Disadvantages}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
Portable & No OOP \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Extensive Libraries & Very loose type checking \tn 
% Row Count 4 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{Systems Programming} \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Mid Level} \tn 
% Row Count 6 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{0.4977 cm} p{0.4977 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Levels of Abstraction}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{{\bf{Scripting/ Interpreted Languages}}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{{\bf{High/ Middle Level Languages}}} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{{\bf{Assembly Language}}} \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{{\bf{Machine Code}}} \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{Binary Code} \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}