\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
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\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{bausac16}
\pdfinfo{
  /Title (single-area-ospf.pdf)
  /Creator (Cheatography)
  /Author (bausac16)
  /Subject (Single-Area OSPF Cheat Sheet)
}

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% 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
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\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
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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{Single-Area OSPF Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{bausac16} via \textcolor{DarkBackground}{\uline{cheatography.com/100632/cs/21723/}}}
\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}bausac16 \\
  \uline{cheatography.com/bausac16} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 4th February, 2020.\\
   Updated 3rd February, 2020.\\
   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{4.48 cm} x{3.52 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Basic configuration}}  \tn
% Row 0
\SetRowColor{LightBackground}
Disable DNS lookup & no ip domain-lookup \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
Configure device name & hostname {[}name{]} \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Privileged exec mode password & enable secret {[}password{]} \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
Console password & password {[}password{]} \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
Copy running to startup config & copy r s \tn 
% Row Count 9 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{These commands were executed on all routers!}  \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}{Router 1}}  \tn
% Row 0
\SetRowColor{LightBackground}
router ospf 1 & enable ospf \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
network 192.168.12.0 0.0.0.3\{\{nl\}\}area 0 & configure network statements \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
show ip ospf neighbor & verify that all routers list all other routers as neighbours \tn 
% Row Count 6 (+ 3)
% Row 3
\SetRowColor{white}
show ip ospf & see process id and router id \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
show ip ospf interface & detailed list of every OSPF-enabled interface \tn 
% Row Count 11 (+ 3)
% Row 5
\SetRowColor{white}
show ip ospf interface g0/0 & see specific interface \tn 
% Row Count 13 (+ 2)
% Row 6
\SetRowColor{LightBackground}
show ip route ospf & cost for routes \tn 
% Row Count 14 (+ 1)
% Row 7
\SetRowColor{white}
auto-cost references-bandwith 100 & sets the reference bandwith \tn 
% Row Count 16 (+ 2)
% Row 8
\SetRowColor{LightBackground}
ip ospf cost 1565 & set specific cost \tn 
% Row Count 17 (+ 1)
% Row 9
\SetRowColor{white}
show ip ospf interface brief & verify that ospf is configured \tn 
% Row Count 19 (+ 2)
% Row 10
\SetRowColor{LightBackground}
ip ospf priority 255 & set interface priority \tn 
% Row Count 21 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{These are the most important commands for R1 concerning OSPF!}  \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}{Router 2}}  \tn
% Row 0
\SetRowColor{LightBackground}
enable OSPF & router ospf {[}process-id{]} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
verify OSPF neighbors & show ip ospf neighbor \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
routing table & show ip route \tn 
% Row Count 5 (+ 1)
% Row 3
\SetRowColor{white}
verify OSPF protocol settings & show ip protocols \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
verify OSPF interface settings & show ip ospf interface brief \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
change router IDs using loopback addresses & interface lo0\{\{nl\}\}{\bf{ip address 1.1.1.1 255.255.255.255}}\{\{nl\}\}end \tn 
% Row Count 13 (+ 4)
% Row 6
\SetRowColor{LightBackground}
configure G0/0 with OSPF priority 0 & interface g0/0\{\{nl\}\}{\bf{ip ospf priority 100}}\{\{nl\}\}end \tn 
% Row Count 16 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{These are the most important commands for R2 concerning OSPF!}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.52 cm} x{4.48 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Router 3}}  \tn
% Row 0
\SetRowColor{LightBackground}
router ospf 1 & enable ospf \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
network {[}ip{]} {[}subnetmask{]} area 0 & add network to ospf area \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
ip ospf priority {[}number{]} & set priority to ospf at interface \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
show ip ospf neighbor & show all devices learned over ospf \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
clear ip ospf 1 process & reset all the routers of the ospf process \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
show ip ospf interface & show ospf details \tn 
% Row Count 11 (+ 2)
% Row 6
\SetRowColor{LightBackground}
show ip interface brief & show all interfaces \tn 
% Row Count 13 (+ 2)
% Row 7
\SetRowColor{white}
show ip protocols & show all running protocols \tn 
% Row Count 15 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{These are the most important commands for R3 concerning OSPF!}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}