\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{LarinKZ}
\pdfinfo{
  /Title (syslog.pdf)
  /Creator (Cheatography)
  /Author (LarinKZ)
  /Subject (Syslog 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}{C7AE80}
\definecolor{LightBackground}{HTML}{F8F4EF}
\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{Syslog Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{LarinKZ} via \textcolor{DarkBackground}{\uline{cheatography.com/213527/cs/46455/}}}
\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}LarinKZ \\
  \uline{cheatography.com/larinkz} \\
  \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 26th May, 2025.\\
   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}{Protocol Information}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{A standard for message logging that allows applications and systems to send log messages to a centralized location for storage, analysis, and monitoring. Syslog uses {\bf{UDP}} port {\bf{514}}!% Row Count 4 (+ 4)
} \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}{Syslog Message Format}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\emph{seq no: timestamp: \seqsplit{\%facility-severity-MNEMONIC:} description}}% Row Count 2 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{This is the the standard format for syslog messages, often used in {\bf{Cisco devices}}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.76 cm} x{6.24 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Breakdown of the Syslog message format}}  \tn
% Row 0
\SetRowColor{LightBackground}
seq no & represents the sequence number \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\seqsplit{timestamp} & the date and time of the event \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{facility} & represents what the log message is referring to \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
\seqsplit{severity} & severity code in the range 0 to 7 \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\seqsplit{MNEMONIC} & short code for the message \tn 
% Row Count 8 (+ 1)
% Row 5
\SetRowColor{white}
\seqsplit{description} & brief description of the event \tn 
% Row Count 10 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.596 cm} x{3.8 cm} x{2.204 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{8.4cm}}{\bf\textcolor{white}{Syslog Severity Levels}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Severity}} & {\bf{Description}} & {\bf{Numerical code}} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\seqsplit{Emergency} & System is unusable & 0 \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
Alert & Action must be taken immediately & 1 \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
\seqsplit{Critical} & Critical conditions & 2 \tn 
% Row Count 7 (+ 1)
% Row 4
\SetRowColor{LightBackground}
Error & Error conditions & 3 \tn 
% Row Count 8 (+ 1)
% Row 5
\SetRowColor{white}
Warning & Warning conditions & 4 \tn 
% Row Count 9 (+ 1)
% Row 6
\SetRowColor{LightBackground}
Notice & Normal but significant condition & 5 \tn 
% Row Count 11 (+ 2)
% Row 7
\SetRowColor{white}
\seqsplit{Informational} & Informational messages & 6 \tn 
% Row Count 13 (+ 2)
% Row 8
\SetRowColor{LightBackground}
Debug & Debug-level messages & 7 \tn 
% Row Count 14 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Example of message generated by a {\bf{Cisco}} router}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{*Mar 28 12:12:12.312: \%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to down} \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}{References and Further reading}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{\{\{link="https://datatracker.ietf.org/doc/html/rfc5424\#page-8"\}\}RFC 5424\{\{/link\}\} \newline % Row Count 2 (+ 2)
\{\{link="https://www.cisco.com/c/en/us/td/docs/switches/metro/me1200/controller/guide/b\_nid\_controller\_book/b\_nid\_controller\_book\_chapter\_010101.pdf"\}\}Configuring Syslog\{\{/link\}\}% Row Count 6 (+ 4)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.08 cm} x{5.92 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Syslog Message Facilities}}  \tn
% Row 0
\SetRowColor{LightBackground}
Numerical code & Facility \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
0 & kernel messages \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
1 & user-level messages \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
2 & mail system \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
3 & system daemons \tn 
% Row Count 6 (+ 1)
% Row 5
\SetRowColor{white}
4 & security/authorization messages \tn 
% Row Count 8 (+ 2)
% Row 6
\SetRowColor{LightBackground}
5 & messages generated internally by syslogd \tn 
% Row Count 10 (+ 2)
% Row 7
\SetRowColor{white}
6 & line printer subsystem \tn 
% Row Count 11 (+ 1)
% Row 8
\SetRowColor{LightBackground}
7 & network news subsystem \tn 
% Row Count 12 (+ 1)
% Row 9
\SetRowColor{white}
8 & UUCP subsystem \tn 
% Row Count 13 (+ 1)
% Row 10
\SetRowColor{LightBackground}
9 & clock daemon \tn 
% Row Count 14 (+ 1)
% Row 11
\SetRowColor{white}
10 & security/authorization messages \tn 
% Row Count 16 (+ 2)
% Row 12
\SetRowColor{LightBackground}
11 & FTP daemon \tn 
% Row Count 17 (+ 1)
% Row 13
\SetRowColor{white}
12 & NTP subsystem \tn 
% Row Count 18 (+ 1)
% Row 14
\SetRowColor{LightBackground}
13 & log audit \tn 
% Row Count 19 (+ 1)
% Row 15
\SetRowColor{white}
14 & log alert \tn 
% Row Count 20 (+ 1)
% Row 16
\SetRowColor{LightBackground}
15 & clock daemon (note 2) \tn 
% Row Count 21 (+ 1)
% Row 17
\SetRowColor{white}
16 & local use 0  (local0) \tn 
% Row Count 22 (+ 1)
% Row 18
\SetRowColor{LightBackground}
17 & local use 1  (local1) \tn 
% Row Count 23 (+ 1)
% Row 19
\SetRowColor{white}
18 & local use 2  (local2) \tn 
% Row Count 24 (+ 1)
% Row 20
\SetRowColor{LightBackground}
19 & local use 3  (local3) \tn 
% Row Count 25 (+ 1)
% Row 21
\SetRowColor{white}
20 & local use 4  (local4) \tn 
% Row Count 26 (+ 1)
% Row 22
\SetRowColor{LightBackground}
21 & local use 5  (local5) \tn 
% Row Count 27 (+ 1)
% Row 23
\SetRowColor{white}
22 & local use 6  (local6) \tn 
% Row Count 28 (+ 1)
% Row 24
\SetRowColor{LightBackground}
23 & local use 7  (local7) \tn 
% Row Count 29 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Calculation of Priority}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\emph{Priority = Facility }} 8 + Severity*% Row Count 1 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{For example, a kernel message (Facility=0) with a Severity of Emergency (Severity=0) would have a Priority value of 0.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}