\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{Frank Hunleth (fhunleth)}
\pdfinfo{
  /Title (nerves.pdf)
  /Creator (Cheatography)
  /Author (Frank Hunleth (fhunleth))
  /Subject (Nerves Cheat Sheet)
}

% Lengths and widths
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\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}{A3A3A3}
\definecolor{LightBackground}{HTML}{F3F3F3}
\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{Nerves Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Frank Hunleth (fhunleth)} via \textcolor{DarkBackground}{\uline{cheatography.com/34553/cs/12188/}}}
\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}Frank Hunleth (fhunleth) \\
  \uline{cheatography.com/fhunleth} \\
        \uline{\seqsplit{frank}.hunleth.com/}
  \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 28th June, 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*}{2}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{~}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{p{8.4cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/fhunleth_1498573382_nerves-project.png}}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.16 cm} x{5.84 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Terminology}}  \tn
% Row 0
\SetRowColor{LightBackground}
host & The computer on which you are editing source code, compiling, and assembling firmware \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
target & The platform for which your firmware is built (for example, Raspberry Pi, Raspberry Pi 2, or Beaglebone Black) \tn 
% Row Count 7 (+ 4)
% Row 2
\SetRowColor{LightBackground}
toolchain & The tools required to build code for the target, such as compilers, linkers, binutils, and C runtime \tn 
% Row Count 11 (+ 4)
% Row 3
\SetRowColor{white}
system & A lean Buildroot-based Linux distribution that has been customized and cross-compiled for a particular target \tn 
% Row Count 15 (+ 4)
% Row 4
\SetRowColor{LightBackground}
assemble & The process of combining system, application, and configuration into a firmware bundle \tn 
% Row Count 18 (+ 3)
% Row 5
\SetRowColor{white}
firmware bundle & A single file that contains an assembled version of everything needed to burn firmware \tn 
% Row Count 21 (+ 3)
% Row 6
\SetRowColor{LightBackground}
firmware image & Built from a firmware bundle and contains the partition table, partitions, bootloader, etc. \tn 
% Row Count 25 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Installation}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{MacOS}} \newline % Row Count 1 (+ 1)
`\$ brew update` \newline % Row Count 2 (+ 1)
`\$ brew install erlang elixir fwup squashfs coreutils` \newline % Row Count 4 (+ 2)
{\bf{Linux}} \newline % Row Count 5 (+ 1)
`\$ sudo apt-get install ssh-askpass squashfs-tools` \newline % Row Count 7 (+ 2)
{\bf{All platforms}} \newline % Row Count 8 (+ 1)
`\$ mix local.hex` \newline % Row Count 9 (+ 1)
`\$ mix local.rebar` \newline % Row Count 10 (+ 1)
`\$ mix archive.install \seqsplit{https://github.com/nerves-project/archives/raw/master/nerves\_bootstrap.ez`} \newline % Row Count 12 (+ 2)
{\bf{Updating}} \newline % Row Count 13 (+ 1)
`\$ mix local.nerves`% Row Count 14 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{\seqsplit{https://hexdocs.pm/nerves/installation.html}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Tutorial projects}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Pi Camera}} \newline % Row Count 1 (+ 1)
`git clone \seqsplit{https://fhunleth@bitbucket}.org/fhunleth/nerves\_cam.git`% Row Count 3 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.964 cm} x{3.42 cm} x{1.216 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{8.4cm}}{\bf\textcolor{white}{Official targets}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Target}} & {\bf{Nerves System}} & {\bf{mix}} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
Raspberry Pi Zero & \seqsplit{nerves\_system\_rpi0} & rpi0 \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
Raspberry Pi A, B & nerves\_system\_rpi & rpi \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
Raspberry Pi 2 & \seqsplit{nerves\_system\_rpi2} & rpi2 \tn 
% Row Count 7 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Raspberry Pi 3 & \seqsplit{nerves\_system\_rpi3} & rpi3 \tn 
% Row Count 8 (+ 1)
% Row 5
\SetRowColor{white}
All BeagleBones & nerves\_system\_bbb & bbb \tn 
% Row Count 9 (+ 1)
% Row 6
\SetRowColor{LightBackground}
Lego EV3 & nerves\_system\_ev3 & ev3 \tn 
% Row Count 10 (+ 1)
% Row 7
\SetRowColor{white}
Linkit Smart & \seqsplit{nerves\_system\_linkit} & \seqsplit{linkit} \tn 
% Row Count 12 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Nerves basics}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Create a new project}} \newline % Row Count 1 (+ 1)
`\$ mix nerves.new hello\_nerves` \newline % Row Count 2 (+ 1)
{\bf{Build firmware bundle}} \newline % Row Count 3 (+ 1)
`\$ cd hello\_nerves` \newline % Row Count 4 (+ 1)
`\$ export MIX\_TARGET=\textless{}mix target\textgreater{}` \newline % Row Count 5 (+ 1)
`\$ mix deps.get` \newline % Row Count 6 (+ 1)
`\$ mix firmware` \newline % Row Count 7 (+ 1)
{\bf{Burn a MicroSD card}} \newline % Row Count 8 (+ 1)
`\$ mix firmware.burn` \newline % Row Count 9 (+ 1)
{\bf{Update using nerves\_firmware\_http}} \newline % Row Count 10 (+ 1)
`\$ mix firmware.push hostname {[}-{}-target \textless{}mix target\textgreater{}{]}`% Row Count 12 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Connecting to the target}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Most Nerves systems provide an IEx prompt over a serial port or UART. TTY emulators like `screen` and `picocom` can access it. Check the system for baud rate (normally 115200). \newline % Row Count 4 (+ 4)
{\bf{screen}} \newline % Row Count 5 (+ 1)
`\$ screen /dev/tty\textless{}device\textgreater{} 115200` \newline % Row Count 6 (+ 1)
Exit screen with CTRL+a, CTRL+\textbackslash{} \newline % Row Count 7 (+ 1)
{\bf{picocom}} \newline % Row Count 8 (+ 1)
`\$ picocom -b 115200 /dev/tty\textless{}device\textgreater{}` \newline % Row Count 9 (+ 1)
Exit picocom with CTRL+a, CTRL+x% Row Count 10 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.36 cm} x{4.64 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Useful IEx commands}}  \tn
% Row 0
\SetRowColor{LightBackground}
Run a Linux command & `:os.cmd('ps') |\textgreater{} IO.puts` \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
Reboot & \seqsplit{`Nerves.Runtime.reboot`} \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Shell & `\textless{}CTRL+g\textgreater{}s sh\textless{}Enter\textgreater{}c 1` \tn 
% Row Count 5 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}