\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{tehmarzvolta (tehmarzvolta)}
\pdfinfo{
  /Title (new-hire.pdf)
  /Creator (Cheatography)
  /Author (tehmarzvolta (tehmarzvolta))
  /Subject (New Hire Cheat Sheet)
}

% Lengths and widths
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\addtolength{\voffset}{-2cm}
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\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{New Hire Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{tehmarzvolta (tehmarzvolta)} via \textcolor{DarkBackground}{\uline{cheatography.com/87286/cs/20175/}}}
\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}tehmarzvolta (tehmarzvolta) \\
  \uline{cheatography.com/tehmarzvolta} \\
  \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 1st August, 2019.\\
   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*}{4}

\begin{tabularx}{3.833cm}{x{1.61351 cm} x{1.81949 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{Commands and Tasks}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Kernel Information}} & uname -sr \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{CPU Info}} & cat /proc/cpuinfo \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
{\bf{Memory Info}} & free -h \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
{\bf{Reboots Info}} & last reboot \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
{\bf{List Block Devices}} & lsblk \tn 
% Row Count 7 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{Get BIOS settings}} & racadm get \seqsplit{BIOS.SysProfileSettings} \tn 
% Row Count 9 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{Look for Attack Scripts}} & strings root/dos64 | grep -i attack \tn 
% Row Count 11 (+ 2)
% Row 7
\SetRowColor{white}
{\bf{Look for Spam - Subjects}} & tcpdump -nn -i SRVID\#\#\#\#\# -A "dst port 25" | grep -i subject \tn 
% Row Count 14 (+ 3)
% Row 8
\SetRowColor{LightBackground}
{\bf{Dead Processes}} & ps aux | awk '\$8 \textasciitilde{} /D/' \tn 
% Row Count 16 (+ 2)
% Row 9
\SetRowColor{white}
{\bf{Limit IOPS}} & virsh blkdeviotune SRVID\#\#\#\#\# sda -{}-total\_iops\_sec=100 \tn 
% Row Count 19 (+ 3)
% Row 10
\SetRowColor{LightBackground}
{\bf{Look for port in use}} & netstat -lp | grep \textless{}PORT TO FIND\textgreater{} \tn 
% Row Count 21 (+ 2)
% Row 11
\SetRowColor{white}
{\bf{Add IPTables rules}} & iptables -I INPUT -s \textless{}YOUR\_IP\textgreater{} -j ACCEPT \tn 
% Row Count 23 (+ 2)
% Row 12
\SetRowColor{LightBackground}
{\bf{Remove IPTables rules}} & iptables -D INPUT -s \textless{}YOUR\_IP\textgreater{} -j ACCEPT \tn 
% Row Count 25 (+ 2)
% Row 13
\SetRowColor{white}
{\bf{Gracefully shut down all guests}} & virsh list | awk '\{print \$2\}' | grep SRVID | xargs -n1 virsh shutdown \tn 
% Row Count 29 (+ 4)
% Row 14
\SetRowColor{LightBackground}
{\bf{Earliest sign of disk failure}} & cat /var/log/messages | grep exception \tn 
% Row Count 31 (+ 2)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{3.833cm}{x{1.61351 cm} x{1.81949 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{Commands and Tasks (cont)}}  \tn
% Row 15
\SetRowColor{LightBackground}
{\bf{Get Serials}} & smartctl -{}-info /dev/sda | fgrep -i Serial \tn 
% Row Count 2 (+ 2)
% Row 16
\SetRowColor{white}
{\bf{Get Serials and Firmware}} & hdparm -I /dev/sd{[}a-d{]} | grep 'Number\textbackslash{}|Revision' \tn 
% Row Count 5 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{x{1.44186 cm} x{1.99114 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{Ceph}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Ceph Health}} & ceph health detail \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
{\bf{List Ceph Disks}} & ceph-disk list \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{Setting 'noout'}} & ceph osd set noout \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{Removing 'noout'}} & ceph osd unset noout \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{Fix Inconsistant PGs}} & ceph pg repair \{id\} \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{Start Ceph OSD (Centos 6)}} & service ceph (start|stop|restart) osd.\{id\} \tn 
% Row Count 11 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{Start Ceph OSD (Centos 7)}} & systemctl (start|stop|restart) ceph-osd@\{id\} \tn 
% Row Count 13 (+ 2)
% Row 7
\SetRowColor{white}
{\bf{List down OSDs}} & ceph osd tree | grep down \tn 
% Row Count 15 (+ 2)
% Row 8
\SetRowColor{LightBackground}
{\bf{Locate host of an OSD}} & ceph osd find \{id\} \tn 
% Row Count 17 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{x{1.57918 cm} x{1.85382 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{SmartMon Tools}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Check Health}} & smartctl -H /dev/\textless{}DISK\textgreater{} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{Short Test}} & smartctl -t short /dev/\textless{}DISK\textgreater{} \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{Check Results of Test}} & smartctl -a /dev/\textless{}DISK\textgreater{} \tn 
% Row Count 6 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{x{1.51052 cm} x{1.92248 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{TCPDUMP}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Capture all traffic}} & tcpdump -nn -i SRVID\#\#\#\#\# \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{Capture Outbound SMTP}} & tcpdump -nn -i SRVID\#\#\#\#\# -A "dst port 25" \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{Capture new TCP connections}} & tcpdump -nn -i SRVID\#\#\#\#\# "tcp{[}tcpflags{]} \& (tcp-syn) != 0" \tn 
% Row Count 7 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{x{1.64784 cm} x{1.78516 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{DNS}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Lookup records of domain}} & dig +answer \textless{}DOMAIN\textgreater{} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{Look for A records of domain}} & dig +noall +answer \textless{}DOMAIN\textgreater{} \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{Reverse DNS of an IP}} & dig -X +noall +answer \textless{}IP\_ADDRESS\textgreater{} \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{Lookup domain information}} & whois \textless{}DOMAIN\textgreater{} \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{Lookup MX records}} & dig +noall +answer \textless{}DOMAIN\textgreater{} MX \tn 
% Row Count 10 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{Lookup TXT records}} & dig +noall +answer \textless{}DOMAIN\textgreater{} TXT \tn 
% Row Count 12 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{Lookup nameservers}} & dig +noall +answer \textless{}DOMAIN\textgreater{} NS \tn 
% Row Count 14 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{x{1.7165 cm} x{1.7165 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{VIRSH}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{List all VMs}} & virsh list -{}-all \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
{\bf{Start a VM}} & virsh start \textless{}VM\_NAME\textgreater{} \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{Stop a VM}} & virsh destroy \textless{}VM\_NAME\textgreater{} \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{Undefine a VM}} & virsh undefine \textless{}VM\_NAME\textgreater{} \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{Define a VM}} & virsh define \textless{}PATH\_TO\_XML\textgreater{} \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{Dump the configuration}} & virsh dumpxml \textless{}VM\_NAME\textgreater{} \tn 
% Row Count 11 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{p{0.3433 cm} p{0.3433 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{.}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{3.833cm}}{} \tn 
% Row Count 0 (+ 0)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{3.833cm}{x{1.57918 cm} x{1.85382 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{3.833cm}}{\bf\textcolor{white}{LVM}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Display physical volumes}} & pvs \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{Display volume groups}} & vgs \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{Display logical volumes}} & lvs \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{List VGs and their UUIDs}} & vgs -o +pv\_name,uuid \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{Rename an LV}} & vgrename \textless{}UUID\textgreater{} \textless{}New\_Name\textgreater{} \tn 
% Row Count 10 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{Activate an VG}} & lvchange -a y \textless{}volume\_group\textgreater{} \tn 
% Row Count 12 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{Activate and ensure working VG}} & lvs | awk 'BEGIN \{OFS = ";"\} \{print \$2,\$1\}' | sed 's/;/\textbackslash{}//g' | grep \textless{}logical\_volume\textgreater{} | xargs -n1 lvchange -ay \tn 
% Row Count 18 (+ 6)
% Row 7
\SetRowColor{white}
{\bf{Deactive a VG}} & vgchange -a n \textless{}volume\_group\textgreater{}.bak \tn 
% Row Count 20 (+ 2)
% Row 8
\SetRowColor{LightBackground}
{\bf{Create an LV}} & lvcreate \textless{}volume\_group\textgreater{} -{}-name \textless{}new\_lv\_name\textgreater{} -{}-size \#\#G \tn 
% Row Count 23 (+ 3)
% Row 9
\SetRowColor{white}
{\bf{Remove an LV forcefully}} & lvremove -f /dev/\textless{}volume\_group\textgreater{}/\textless{}logical\_volume\textgreater{} \tn 
% Row Count 26 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}