\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
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\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{pka2412}
\pdfinfo{
  /Title (linux-commands.pdf)
  /Creator (Cheatography)
  /Author (pka2412)
  /Subject (Linux commands Cheat Sheet)
}

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% This two commands together give roughly
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% 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

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\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{Linux commands Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{pka2412} via \textcolor{DarkBackground}{\uline{cheatography.com/192189/cs/39963/}}}
\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}pka2412 \\
  \uline{cheatography.com/pka2412} \\
  \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 22nd August, 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{2.64 cm} x{5.36 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Basic info}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{pwd}} & show present working directory \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{uname}} & show name of the kernel \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
{\bf{uname -r}} & show kernel version \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
{\bf{cd}} & change directory \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
{\bf{clear}} & clear the screen \tn 
% Row Count 6 (+ 1)
% Row 5
\SetRowColor{white}
{\bf{whoami}} & show current login user name \tn 
% Row Count 8 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{history}} & show list of previously used commands \tn 
% Row Count 10 (+ 2)
% Row 7
\SetRowColor{white}
{\bf{date}} & show time and date \tn 
% Row Count 11 (+ 1)
% Row 8
\SetRowColor{LightBackground}
{\bf{echo}} {\emph{"Hello"}} & display {\emph{Hello}} text \tn 
% Row Count 13 (+ 2)
% Row 9
\SetRowColor{white}
{\bf{sudo}} & run commands as super user \tn 
% Row Count 14 (+ 1)
\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}{Working with directory and files}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{mkdir}} {\emph{dir}} & create single directory {\emph{dir}} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{mkdir}} {\emph{dir1}} {\emph{dir2}} & create multiple directories {\emph{dir1}} {\emph{dir2}} \tn 
% Row Count 5 (+ 3)
% Row 2
\SetRowColor{LightBackground}
{\bf{mkdir -p}} {\emph{dir/a/b/c}} & create nested directory {\emph{dir/a/b/c}} \tn 
% Row Count 7 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{mkdir}} {\emph{dir\{1..10\}}} & created 10 numbered directories from {\emph{dir1}} to {\emph{dir10}} \tn 
% Row Count 10 (+ 3)
% Row 4
\SetRowColor{LightBackground}
{\bf{rm -r}} {\emph{dir}} & remove {\emph{dir}} recursively \tn 
% Row Count 12 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{touch}} {\emph{file}} & create empty file {\emph{file}} \tn 
% Row Count 14 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{touch}} {\emph{file1}} {\emph{file2}} & create multiple files {\emph{file1}} {\emph{file2}} \tn 
% Row Count 16 (+ 2)
% Row 7
\SetRowColor{white}
{\bf{touch}} {\emph{file\{1..10\}}} & create 10 numbered files from {\emph{file1}} to {\emph{file10}} \tn 
% Row Count 19 (+ 3)
% Row 8
\SetRowColor{LightBackground}
{\bf{cp -rf}} {\emph{/dir/file1 /dir2}} & copy file {\emph{file1}} to {\emph{dir2}} directory recursively and forcefully \tn 
% Row Count 23 (+ 4)
% Row 9
\SetRowColor{white}
{\bf{mv}} {\emph{/dir/file1 /dir2}} & move file {\emph{file1}} to {\emph{dir2}} directory \tn 
% Row Count 25 (+ 2)
% Row 10
\SetRowColor{LightBackground}
{\bf{rm}} {\emph{file1}} & remove file {\emph{file1}} \tn 
% Row Count 26 (+ 1)
% Row 11
\SetRowColor{white}
{\bf{ls -al}} & show files - both regular \& hidden files and their permissions \tn 
% Row Count 30 (+ 4)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Working with directory and files (cont)}}  \tn
% Row 12
\SetRowColor{LightBackground}
{\bf{cat}} {\emph{file1}} & display contents of {\emph{file1}} \tn 
% Row Count 2 (+ 2)
% Row 13
\SetRowColor{white}
{\bf{find}} {\emph{/dir1}} {\bf{-name}} {\emph{file1}} & find {\emph{file1}} under {\emph{/dir1}} directory \tn 
% Row Count 4 (+ 2)
% Row 14
\SetRowColor{LightBackground}
{\bf{find}} {\emph{/dir1}} {\bf{-perm}} 664 & find all files/directories with read, write permission to owner and group, read permission for others in directory {\emph{dir1}} \tn 
% Row Count 11 (+ 7)
% Row 15
\SetRowColor{white}
{\bf{find}} {\emph{/dir1}} {\bf{-empty -exec rm -r \{\}}}** & find and remove all empty files/directories from {\emph{/dir1}} \tn 
% Row Count 14 (+ 3)
% Row 16
\SetRowColor{LightBackground}
{\bf{wc -l}} {\emph{file1}} & count the number of lines in {\emph{file1}} \tn 
% Row Count 16 (+ 2)
% Row 17
\SetRowColor{white}
{\bf{wc -w}} {\emph{file1}} & count the number of words in "file1* \tn 
% Row Count 18 (+ 2)
% Row 18
\SetRowColor{LightBackground}
{\bf{head}} {\emph{file1}} & display top 10 lines of {\emph{file1}} \tn 
% Row Count 20 (+ 2)
% Row 19
\SetRowColor{white}
{\bf{head -n 20}} {\emph{file1}} & display top 20 lines of {\emph{file1}} \tn 
% Row Count 22 (+ 2)
% Row 20
\SetRowColor{LightBackground}
{\bf{tail}} {\emph{file1}} & display last 10 lines of {\emph{file1}} \tn 
% Row Count 24 (+ 2)
% Row 21
\SetRowColor{white}
{\bf{tail -n 20}} {\emph{file1}} & display last 20 lines of {\emph{file1}} \tn 
% Row Count 26 (+ 2)
\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}{Networking}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{ifconfig}} or {\bf{ip addr}} & show ip address \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{nmcli con show}} & show list of connections \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{nslookup}} & queries the DNS server for information about a domain name or IP address \tn 
% Row Count 8 (+ 4)
% Row 3
\SetRowColor{white}
{\bf{iptables}} & sets up, maintains, and inspects the tables of IPv4/IPv6 packet filter rules in the Linux kernel firewall \tn 
% Row Count 13 (+ 5)
% Row 4
\SetRowColor{LightBackground}
{\bf{ping}} {\emph{host}} & send packets to {\emph{host}} to check the connectivity \tn 
% Row Count 16 (+ 3)
% Row 5
\SetRowColor{white}
{\bf{ping -c}} {\emph{5 host}} & send 5 packets to {\emph{host}} \tn 
% Row Count 18 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{curl}} & facilitates the transfer of data to or from a server, using any of the protocols it supports \tn 
% Row Count 23 (+ 5)
% Row 7
\SetRowColor{white}
{\bf{netstat}} & Displays network connections and network statistics, such as active sockets, routing tables, and network interface statistics \tn 
% Row Count 29 (+ 6)
% Row 8
\SetRowColor{LightBackground}
{\bf{ss-keygen}} & Creates a pair of public and private authentication keys \tn 
% Row Count 32 (+ 3)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{3.52 cm} x{4.48 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Networking (cont)}}  \tn
% Row 9
\SetRowColor{LightBackground}
{\bf{ssh}} {\emph{user@host}} & connect {\emph{user}} to {\emph{host}} using ssh \tn 
% Row Count 2 (+ 2)
% Row 10
\SetRowColor{white}
{\bf{scp}} {\emph{file1 user1@host:/dir}} & copy {\emph{file1}} from local to remote host {\emph{host}} to {\emph{/dir}} location \tn 
% Row Count 5 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.56 cm} x{5.44 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{System and process monitoring}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{uptime}} & show current uptime \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
{\bf{df}} & show disk usage \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
{\bf{du}} & show directory space usage \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
{\bf{free}} & show memory and swap usage \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
{\bf{ps}} & show all current active processes \tn 
% Row Count 6 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{top}} & task manager program displays information about CPU and memory utilization \tn 
% Row Count 9 (+ 3)
% Row 6
\SetRowColor{LightBackground}
{\bf{kill}} {\emph{pid}} & kill process with process id {\emph{pid}} \tn 
% Row Count 11 (+ 2)
% Row 7
\SetRowColor{white}
{\bf{bg}} & list stopped or background jobs \tn 
% Row Count 13 (+ 2)
% Row 8
\SetRowColor{LightBackground}
{\bf{lsof}} & Lists all files opened by any process of a system \tn 
% Row Count 15 (+ 2)
% Row 9
\SetRowColor{white}
{\bf{lsof -u}} {\emph{user1}} & Lists all files opened by {\emph{user1}} \tn 
% Row Count 17 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.76 cm} x{4.24 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{File permissions}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{chmod {[}symbolic{]}}} {\emph{file1}} & change file permissions of file {\emph{file1}} based on {\emph{{[}symbolic{]}}} code \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
{\bf{chmod u+r}} {\emph{file1}} & add read permission to owner for {\emph{file1}} \tn 
% Row Count 6 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{chmod g+rw}} {\emph{file1}} & add read, write permission to group for {\emph{file1}} \tn 
% Row Count 9 (+ 3)
% Row 3
\SetRowColor{white}
{\bf{chmod o-r}} {\emph{file1}} & remove read permission to others for {\emph{file1}} \tn 
% Row Count 12 (+ 3)
% Row 4
\SetRowColor{LightBackground}
{\bf{chmod {[}octal{]}}} {\emph{file1}} & change file permissions of file {\emph{file1}} based on {\emph{{[}octal{]}}} code \tn 
% Row Count 15 (+ 3)
% Row 5
\SetRowColor{white}
{\bf{chmod 777}} {\emph{file1}} & add read, write, execute permission to owner, group, others for {\emph{file1}} \tn 
% Row Count 19 (+ 4)
% Row 6
\SetRowColor{LightBackground}
{\bf{chmod 754}} {\emph{file1}} & add read, write, execute persmission to owner, read and execute permission to group, read permission to others for {\emph{file1}} \tn 
% Row Count 25 (+ 6)
% Row 7
\SetRowColor{white}
{\bf{chown}} {\emph{user1}} {\emph{file1}} & change ownership of {\emph{file1}} to {\emph{user1}} \tn 
% Row Count 27 (+ 2)
% Row 8
\SetRowColor{LightBackground}
{\bf{chgrp}} {\emph{group1}} {\emph{file1}} & change group ownership of {\emph{file1}} to {\emph{group1}} \tn 
% Row Count 30 (+ 3)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{3.76 cm} x{4.24 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{File permissions (cont)}}  \tn
% Row 9
\SetRowColor{LightBackground}
{\bf{setfacl -m}} {\emph{u:user1:rwx}} {\emph{file1}} & add read, write, execute permission to user {\emph{user1}} for {\emph{file1}} \tn 
% Row Count 3 (+ 3)
% Row 10
\SetRowColor{white}
{\bf{setfacl -x}} {\emph{u:user1:}} {\emph{file1}} & remove all permissions for {\emph{user1}} for {\emph{file1}} \tn 
% Row Count 6 (+ 3)
% Row 11
\SetRowColor{LightBackground}
{\bf{setfacl -b}} {\emph{file1}} & remove all acl permissions for {\emph{file1}} \tn 
% Row Count 8 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.76 cm} x{4.24 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{User and Group Management}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{useradd}} {\emph{user1}} & create {\emph{user1}} user account \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{passwd}} {\emph{user1}} & create password for {\emph{user1}} user \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{su}} & switch user account \tn 
% Row Count 5 (+ 1)
% Row 3
\SetRowColor{white}
{\bf{exit}} & logout user \tn 
% Row Count 6 (+ 1)
% Row 4
\SetRowColor{LightBackground}
{\bf{userdel}} {\emph{user1}} & delete user account {\emph{user1}} \tn 
% Row Count 8 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{usermod -l}} {\emph{user2 user1}} & change {\emph{user1}} login name to {\emph{user2}} \tn 
% Row Count 10 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{groupadd}} {\emph{group1}} & add group {\emph{group1}} \tn 
% Row Count 12 (+ 2)
% Row 7
\SetRowColor{white}
{\bf{groupdel}} {\emph{group1}} & delete group {\emph{group1}} \tn 
% Row Count 14 (+ 2)
% Row 8
\SetRowColor{LightBackground}
{\bf{gpasswd -a}} {\emph{user1 group1}} & add single user {\emph{user1}} to group {\emph{group1}} \tn 
% Row Count 16 (+ 2)
% Row 9
\SetRowColor{white}
{\bf{gpasswd -M }} {\emph{user1,user2 group1}} & add multiple users {\emph{user1 user2}} to group {\emph{group1}} \tn 
% Row Count 19 (+ 3)
% Row 10
\SetRowColor{LightBackground}
{\bf{gpasswd -d}} {\emph{user1 group1}} & remove user {\emph{user1}} from group {\emph{group1}} \tn 
% Row Count 21 (+ 2)
% Row 11
\SetRowColor{white}
{\bf{gpasswd -A}} {\emph{user1 group1}} & make {\emph{user1}} as admin of {\emph{group1}} \tn 
% Row Count 23 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.6 cm} x{4.4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Text search and manipulation}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{grep}} {\emph{text}} {\emph{file1}} & display the lines that contains {\emph{text}} in {\emph{file1}} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
{\bf{grep -ni}} {\emph{text}} {\emph{file1}} & ignore the case and display line numbers of the matched lines \tn 
% Row Count 6 (+ 3)
% Row 2
\SetRowColor{LightBackground}
{\bf{awk -F',' '\{print \$1"@"\$3\}'}} & print col1@col3 \tn 
% Row Count 8 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{awk -F'\textbackslash{}t' '/str/ \{print \$0\}'}} & print line with str \tn 
% Row Count 10 (+ 2)
\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}{Compress and archive}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{tar -cf}} {\emph{/dir1/backup.tar /dir2}} & create tar archive file {\emph{/dir1/backup.tar}} for {\emph{/dir2}} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
{\bf{tar -xvf}} {\emph{/dir1/backup.tar}} {\bf{-C}} {\emph{/dir2/}} & extract tar archive file {\emph{/dir1/backup.tar}} to {\emph{/dir2/}} \tn 
% Row Count 6 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.68 cm} x{4.32 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{cron jobs}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{at}} {\emph{time}} & schedule command to run at {\emph{time}} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{atq}} & view pending jobs \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
{\bf{atrm}} {\emph{2}} & remove job {\emph{2}} from the scheduled commands \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{crontab -e}} & set cron jobs \tn 
% Row Count 6 (+ 1)
% Row 4
\SetRowColor{LightBackground}
{\bf{0 2 * * *}} {\emph{/dir1/script.sh}} & run script {\emph{/dir1/script.sh}} at 2pm daily \tn 
% Row Count 8 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{crontab -l}} & show the list the cron jobs of current user \tn 
% Row Count 11 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.44 cm} x{4.56 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Package management}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{apt update}} & update the local package index with the latest changes made in the repositories \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
{\bf{apt upgrade}} & upgrade installed packages \tn 
% Row Count 6 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{apt install}} {\emph{package}} & install {\emph{package}} \tn 
% Row Count 8 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{apt remove}} {\emph{package}} & remove installed {\emph{package}} \tn 
% Row Count 10 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{systemctl start}} {\emph{service}} & start {\emph{service}} \tn 
% Row Count 12 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{systemctl status}} {\emph{service}} & check the status of {\emph{service}} \tn 
% Row Count 14 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{systemctl stop}} {\emph{service}} & stop {\emph{service}} \tn 
% Row Count 16 (+ 2)
% Row 7
\SetRowColor{white}
{\bf{systemctl enable}} {\emph{service}} & enable the {\emph{service}} to start at system startup \tn 
% Row Count 19 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}