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% Packages
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\usepackage{multicol}           % Allows multicols in tables
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\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
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%\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{fenix9158}
\pdfinfo{
  /Title (syslogd-and-journal.pdf)
  /Creator (Cheatography)
  /Author (fenix9158)
  /Subject (Syslogd \& Journal Cheat Sheet)
}

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% This two commands together give roughly
% the right line height in the tables
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% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
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% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
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\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{Syslogd \& Journal Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{fenix9158} via \textcolor{DarkBackground}{\uline{cheatography.com/182055/cs/37859/}}}
\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}fenix9158 \\
  \uline{cheatography.com/fenix9158} \\
  \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 12th November, 2023.\\
   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}{Commands}}  \tn
% Row 0
\SetRowColor{LightBackground}
journalctl & Shows more detailed information from the journal. \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
tail -f \textless{}logfile\textgreater{} & Shows in real time which lines are added to the log file. \tn 
% Row Count 6 (+ 3)
% Row 2
\SetRowColor{LightBackground}
systemctl status \textless{}unit\textgreater{} & Show a short overview of the last significant events that have been logged by Systemd units through journald. \tn 
% Row Count 11 (+ 5)
% Row 3
\SetRowColor{white}
logger & Enables users to write messages to rsyslog from the command line or a script \tn 
% Row Count 15 (+ 4)
% Row 4
\SetRowColor{LightBackground}
journalctl -{}-since  {[}-{}-until{]} & to show all messages that have been written since given date (and up to, if provided) \tn 
% Row Count 19 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.72 cm} x{5.28 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Definitions}}  \tn
% Row 0
\SetRowColor{LightBackground}
Facility & Specifies a category of information that is logged. rsyslogd uses a fixed list of facilities, which cannot be extended. This is because of backward compatibility with the legacy syslog service. \tn 
% Row Count 8 (+ 8)
% Row 1
\SetRowColor{white}
Priority & Used to define the severity of the message that needs to be logged. When you specify a priority, by default all messages with that priority and all higher priorities are logged. This is a fixed list. \tn 
% Row Count 16 (+ 8)
% Row 2
\SetRowColor{LightBackground}
Destination & Defines where the message should be written. Typical destinations are files, but rsyslog modules can be used as a destination as well, to allow further processing through a rsyslogd module. \tn 
% Row Count 24 (+ 8)
% Row 3
\SetRowColor{white}
local0 through local7 & If services that do not have their own rsyslogd facility need to write log messages to a specific log file anyway, these services can be configured. \tn 
% Row Count 30 (+ 6)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{2.72 cm} x{5.28 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Definitions (cont)}}  \tn
% Row 4
\SetRowColor{LightBackground}
/run & This directory is used for current process status information only, which means that the journal is cleared when the system reboots. \tn 
% Row Count 6 (+ 6)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.84 cm} x{6.16 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{journald}}  \tn
% Row 0
\SetRowColor{LightBackground}
journald & provides an advanced log management system. journald collects messages from the kernel, the entire boot procedure, and services and writes these messages to an event journal. \tn 
% Row Count 6 (+ 6)
% Row 1
\SetRowColor{white}
\seqsplit{Implemented:} & which is implemented by the systemd-journald daemon \tn 
% Row Count 8 (+ 2)
% Row 2
\SetRowColor{LightBackground}
Format: & Binary \tn 
% Row Count 9 (+ 1)
% Row 3
\SetRowColor{white}
\seqsplit{Retention:} & Non-persistent; however, forwarded to rsyslogd \tn 
% Row Count 11 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.04 cm} x{4.96 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Tips \& Configuration}}  \tn
% Row 0
\SetRowColor{LightBackground}
Logger & Services and users can write directly to log files themselves or through rsyslogd. \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
\seqsplit{/etc/rsyslog.conf} & You can configure the rsyslogd service through here. \tn 
% Row Count 7 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{/etc/sysconfig/rsyslog} & If specific options need to be passed to the rsyslogd service on startup, you can do this by using this file. \tn 
% Row Count 12 (+ 5)
% Row 3
\SetRowColor{white}
(-) Buffered logging & Begin destinations with hyphens caused to have the log messages will not be immediately committed to the file but instead will be buffered to make writes more efficient. \tn 
% Row Count 20 (+ 8)
% Row 4
\SetRowColor{LightBackground}
\seqsplit{/etc/logrotate.conf} & The default settings for log rotation are kept in here. \tn 
% Row Count 23 (+ 3)
% Row 5
\SetRowColor{white}
\seqsplit{/etc/logrotate.d} & Specific logging configurations are placed here and override default configurations. \tn 
% Row Count 27 (+ 4)
% Row 6
\SetRowColor{LightBackground}
\seqsplit{/var/log/journal} & Create to make the journal persistent between system restarts. \tn 
% Row Count 30 (+ 3)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{3.04 cm} x{4.96 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Tips \& Configuration (cont)}}  \tn
% Row 7
\SetRowColor{LightBackground}
\seqsplit{/etc/systemd/journal}.conf & Storing the journal permanently requires setting the Storage=auto parameter. \tn 
% Row Count 4 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}