\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{Shiva (ShivaHaze)}
\pdfinfo{
  /Title (bash-scripting.pdf)
  /Creator (Cheatography)
  /Author (Shiva (ShivaHaze))
  /Subject (Bash Scripting Cheat Sheet)
}

% Lengths and widths
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\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
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\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{4F3D4F}
\definecolor{LightBackground}{HTML}{F4F2F4}
\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{Bash Scripting Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Shiva (ShivaHaze)} via \textcolor{DarkBackground}{\uline{cheatography.com/38495/cs/12000/}}}
\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}Shiva (ShivaHaze) \\
  \uline{cheatography.com/shivahaze} \\
  \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 4th 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{3.36 cm} x{4.64 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Variables}}  \tn
% Row 0
\SetRowColor{LightBackground}
\$0 & Name of the bash script \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\$1 - \$9 & The first 9 arguments to the bash script \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\$\# & Amount of arugments passed to the bash script \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
\$@ & All the arguments supplied to the bash script \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\$? & The exit status of the most recently run process \tn 
% Row Count 10 (+ 3)
% Row 5
\SetRowColor{white}
\$\$ & The process ID of the current script \tn 
% Row Count 12 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\$USER & The username of the user running the script \tn 
% Row Count 14 (+ 2)
% Row 7
\SetRowColor{white}
\$HOSTNAME & The hostname of the machine the script is running on \tn 
% Row Count 17 (+ 3)
% Row 8
\SetRowColor{LightBackground}
\$SECONDS & The number of seconds since the script was started \tn 
% Row Count 20 (+ 3)
% Row 9
\SetRowColor{white}
\$RANDOM & Returns a different random number each time is it referred to \tn 
% Row Count 23 (+ 3)
% Row 10
\SetRowColor{LightBackground}
\$LINENO & Returns the current line number in the Bash script \tn 
% Row Count 26 (+ 3)
% Row 11
\SetRowColor{white}
variable=value & Set value to variable \tn 
% Row Count 27 (+ 1)
% Row 12
\SetRowColor{LightBackground}
echo \$variable & Returns value of the variable \tn 
% Row Count 29 (+ 2)
% Row 13
\SetRowColor{white}
sampledir=/etc & Set path as value to variable \tn 
% Row Count 31 (+ 2)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{3.36 cm} x{4.64 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Variables (cont)}}  \tn
% Row 14
\SetRowColor{LightBackground}
ls \$sampledir & Returns content of /etc \tn 
% Row Count 1 (+ 1)
% Row 15
\SetRowColor{white}
echo & Return empty line \tn 
% Row Count 2 (+ 1)
% Row 16
\SetRowColor{LightBackground}
echo "\$variable" & Returns value of variable \tn 
% Row Count 4 (+ 2)
% Row 17
\SetRowColor{white}
echo '\$variable' & Returns '\$variable' \tn 
% Row Count 5 (+ 1)
% Row 18
\SetRowColor{LightBackground}
variable=\$( ls /etc | wc -l ) & Saves output of command to variable \tn 
% Row Count 7 (+ 2)
% Row 19
\SetRowColor{white}
export variable & Make variable available to child processes \tn 
% Row Count 9 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{0.8 cm} p{0.8 cm} }
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% Row 0
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% Row Count 0 (+ 0)
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\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{0.8 cm} p{0.8 cm} }
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\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Arithmetic}}  \tn
% Row 0
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\mymulticolumn{2}{x{8.4cm}}{} \tn 
% Row Count 0 (+ 0)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{0.8 cm} p{0.8 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{If Statements}}  \tn
% Row 0
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\mymulticolumn{2}{x{8.4cm}}{} \tn 
% Row Count 0 (+ 0)
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\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{0.8 cm} p{0.8 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Loops}}  \tn
% Row 0
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% Row Count 0 (+ 0)
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\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{0.8 cm} p{0.8 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Functions}}  \tn
% Row 0
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\mymulticolumn{2}{x{8.4cm}}{} \tn 
% Row Count 0 (+ 0)
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\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{0.8 cm} p{0.8 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{User Interface}}  \tn
% Row 0
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% Row Count 0 (+ 0)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}