\documentclass[10pt,a4paper]{article}

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\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
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\usepackage{amsmath}            % Symbols
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% Document Info
\author{r\_tempest}
\pdfinfo{
  /Title (linux-general-purpose-cheat-sheet.pdf)
  /Creator (Cheatography)
  /Author (r\_tempest)
  /Subject (Linux General Purpose Cheat Sheet)
}

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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{Linux General Purpose Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{r\_tempest} via \textcolor{DarkBackground}{\uline{cheatography.com/208223/cs/44554/}}}
\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}r\_tempest \\
  \uline{cheatography.com/r-tempest} \\
  \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 7th October, 2024.\\
   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{tabularx}{17.67cm}{x{8.635 cm} x{8.635 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{File, Folders and Permissions management}}  \tn
% Row 0
\SetRowColor{LightBackground}
\{\{width=30\}\}{\bf{Remove file}} & \{\{noshy\}\}rm -f {\bf{{\emph{\textless{}file\textgreater{}}}}} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{Remove folder and its contents}} & \{\{noshy\}\}rm -fr {\bf{{\emph{\textless{}folder\textgreater{}}}}} \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{Recursively remove files matching regex patterns}} & \{\{noshy\}\}find {\bf{{\emph{\textless{}directory\textgreater{}}}}} -regex '{\bf{{\emph{\textless{}extendend\_regex\textgreater{}}}}}' -exec rm -f \{\} \textbackslash{}; \tn 
% Row Count 9 (+ 5)
% Row 3
\SetRowColor{white}
{\bf{Recursively remove files by extension}} & \{\{noshy\}\}find {\bf{{\emph{\textless{}directory\textgreater{}}}}} -iname '*.{\bf{{\emph{\textless{}extension\textgreater{}}}}}' -exec rm -f \{\} \textbackslash{}; \tn 
% Row Count 13 (+ 4)
% Row 4
\SetRowColor{LightBackground}
{\bf{Recursively remove files older than N days}} & \{\{noshy\}\}find {\bf{{\emph{\textless{}directory\textgreater{}}}}} -type f -mtime +{\bf{{\emph{\textless{}number\_of\_days\textgreater{}}}}} -exec rm -f \{\} \textbackslash{}; \tn 
% Row Count 18 (+ 5)
% Row 5
\SetRowColor{white}
{\bf{Cut or rename files or folders}} & \{\{noshy\}\}mv {\bf{{\emph{\textless{}sources files/folder\textgreater{}}}}} {\bf{{\emph{\textless{}destination folder/file\textgreater{}}}}} \tn 
% Row Count 22 (+ 4)
% Row 6
\SetRowColor{LightBackground}
{\bf{Copy files}} & \{\{noshy\}\}cp {\bf{{\emph{\textless{}source files\textgreater{}}}}} {\bf{{\emph{\textless{}destination folder\textgreater{}}}}} \tn 
% Row Count 25 (+ 3)
% Row 7
\SetRowColor{white}
{\bf{Copy folders}} & \{\{noshy\}\}cp -r {\bf{{\emph{\textless{}folders\textgreater{}}}}} {\bf{{\emph{\textless{}destination folder\textgreater{}}}}} \tn 
% Row Count 28 (+ 3)
% Row 8
\SetRowColor{LightBackground}
{\bf{Change permission of file/folder}} & \{\{noshy\}\}chmod {\bf{{\emph{\textless{}owner\_octal\textgreater{}\textless{}group\_octal\textgreater{}\textless{}other\_octal\textgreater{}}}}} {\bf{{\emph{\textless{}file/folder\textgreater{}}}}} \tn 
% Row Count 32 (+ 4)
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{8.635 cm} x{8.635 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{File, Folders and Permissions management (cont)}}  \tn
% Row 9
\SetRowColor{LightBackground}
{\bf{Change permission of folder (Recursively)}} & \{\{noshy\}\}chmod -R {\bf{{\emph{\textless{}owner\_octal\textgreater{}\textless{}group\_octal\textgreater{}\textless{}other\_octal\textgreater{}}}}} {\bf{{\emph{\textless{}folder\textgreater{}}}}} \tn 
% Row Count 4 (+ 4)
% Row 10
\SetRowColor{white}
{\bf{Change owner user and group of file/folder}} & chown {\bf{{\emph{\textless{}user\textgreater{}}}}}:{\bf{{\emph{\textless{}group\textgreater{}}}}} {\bf{{\emph{\textless{}file/folder\textgreater{}}}}} \tn 
% Row Count 7 (+ 3)
% Row 11
\SetRowColor{LightBackground}
{\bf{Change owner user and group of folder (Recursively)}} & chown -R {\bf{{\emph{\textless{}user\textgreater{}}}}}:{\bf{{\emph{\textless{}group\textgreater{}}}}} {\bf{{\emph{\textless{}folder\textgreater{}}}}} \tn 
% Row Count 10 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{17.67cm}}{\textasciicircum{}1\textasciicircum{} Check the octal permissions system at {\bf{Octal Permissions}} session \newline \textasciicircum{}2\textasciicircum{} You can set the maximum search depth when using `find` to remove files with the `-maxdepth N` option. This helps prevent unwanted recursive deletions. For example: `find \textless{}directory\textgreater{} -maxdepth 1 ....`}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{8.2896 cm} x{8.9804 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Firewalld}}  \tn
% Row 0
\SetRowColor{LightBackground}
\{\{width=30\}\}{\bf{Show all zones}} & \{\{noshy\}\}firewall-cmd -{}-get-zones \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{Show all zones and settings}} & \{\{noshy\}\}firewall-cmd -{}-list-all-zones \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{Allow port at zone}} & \{\{noshy\}\}firewall-cmd -{}-permanent -{}-zone={\bf{{\emph{\textless{}zone\textgreater{}}}}} -{}-add-port={\bf{{\emph{\textless{}port\textgreater{}}}}}/{\bf{{\emph{\textless{}protocol\textgreater{}}}}} \tn 
% Row Count 9 (+ 5)
% Row 3
\SetRowColor{white}
{\bf{Reload settings}} & \{\{noshy\}\}firewall-cmd -{}-reload \tn 
% Row Count 11 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{Allow port from specific network}} & \{\{noshy\}\}firewall-cmd -{}-permanent -{}-zone={\bf{{\emph{\textless{}zone\textgreater{}}}}} -{}-add-rich-rule='rule family="ipv4" source address="{\bf{{\emph{\textless{}network\textgreater{}}}}}" port protocol="{\bf{{\emph{\textless{}protocol\textgreater{}}}}}" port="{\bf{{\emph{\textless{}port\textgreater{}}}}}" accept' \tn 
% Row Count 21 (+ 10)
% Row 5
\SetRowColor{white}
{\bf{Remove port from zone}} & firewall-cmd -{}-permanent -{}-zone={\bf{{\emph{\textless{}zone\textgreater{}}}}} -{}-remove-port={\bf{{\emph{\textless{}port\textgreater{}}}}}/{\bf{{\emph{\textless{}protocol\textgreater{}}}}} \tn 
% Row Count 26 (+ 5)
% Row 6
\SetRowColor{LightBackground}
{\bf{Remove port from specific network}} & \{\{noshy\}\}firewall-cmd -{}-permanent -{}-remove-rich-rule='rule family="ipv4" source address="{\bf{{\emph{\textless{}network\textgreater{}}}}}" port protocol="{\bf{{\emph{\textless{}protocol\textgreater{}}}}}" port="{\bf{{\emph{\textless{}port\textgreater{}}}}}" accept \tn 
% Row Count 35 (+ 9)
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{8.2896 cm} x{8.9804 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Firewalld (cont)}}  \tn
% Row 7
\SetRowColor{LightBackground}
{\bf{Allow traffic between interface}} & \{\{noshy\}\}firewall-cmd -{}-permanent -{}-zone={\bf{{\emph{\textless{}zone\textgreater{}}}}} -{}-add-rich-rule='rule family="ipv4" source address="{\bf{{\emph{\textless{}interface\textgreater{}}}}}" accept' \tn 
% Row Count 7 (+ 7)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{17.67cm}}{After making any modifications to firewall rules, it is necessary to reload the rules for the changes to take effect.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{8.635 cm} x{8.635 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Networking}}  \tn
% Row 0
\SetRowColor{LightBackground}
\{\{width=30\}\}{\bf{Check port communication (telnet)}} & \{\{noshy\}\}telnet {\bf{{\emph{\textless{}address\textgreater{}}}}} {\bf{{\emph{\textless{}port\textgreater{}}}}} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
{\bf{Check port communication (netcat)}} & \{\{noshy\}\}nc -zv {\bf{{\emph{\textless{}address\textgreater{}}}}} {\bf{{\emph{\textless{}port\textgreater{}}}}} \tn 
% Row Count 6 (+ 3)
% Row 2
\SetRowColor{LightBackground}
{\bf{Open dummy port (netcat)}} & \{\{noshy\}\}nc -lp {\bf{{\emph{\textless{}port\textgreater{}}}}} \tn 
% Row Count 8 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{Open TLS/SSL Port (openssl)}} & \{\{noshy\}\}openssl s\_server -accept {\bf{{\emph{\textless{}port\textgreater{}}}}} -cert {\bf{{\emph{\textless{}certificate\_file\textgreater{}}}}} -key {\bf{{\emph{\textless{}key\_file\textgreater{}}}}} \tn 
% Row Count 13 (+ 5)
% Row 4
\SetRowColor{LightBackground}
{\bf{Test connection to TLS/SSL Port(openssl)}} & \{\{noshy\}\}openssl s\_client -connect {\bf{{\emph{\textless{}address\textgreater{}}}}}:{\bf{{\emph{\textless{}port\textgreater{}}}}} \tn 
% Row Count 17 (+ 4)
% Row 5
\SetRowColor{white}
{\bf{Show TCP IPV4 Listening ports}} & \{\{noshy\}\}ss -ltnp4 | grep {\bf{{\emph{\textless{}port\textgreater{}}}}} \tn 
% Row Count 19 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{Show TCP IPV6 Listening ports}} & \{\{noshy\}\}ss -ltpn6 | grep {\bf{{\emph{\textless{}port\textgreater{}}}}} \tn 
% Row Count 21 (+ 2)
% Row 7
\SetRowColor{white}
{\bf{Show all connection and ports}} & \{\{noshy\}\}ss -putona \tn 
% Row Count 23 (+ 2)
% Row 8
\SetRowColor{LightBackground}
{\bf{Show interfaces}} & \{\{noshy\}\}ip a \tn 
% Row Count 24 (+ 1)
% Row 9
\SetRowColor{white}
{\bf{Show routes}} & \{\{noshy\}\}ip route \tn 
% Row Count 25 (+ 1)
% Row 10
\SetRowColor{LightBackground}
{\bf{Show DNS properties}} & \{\{noshy\}\}nslookup {\bf{{\emph{\textless{}DNS\textgreater{}}}}} \tn 
% Row Count 27 (+ 2)
% Row 11
\SetRowColor{white}
{\bf{Show ip information}} & \{\{noshy\}\}dig -x {\bf{{\emph{\textless{}ip\textgreater{}}}}} +all \tn 
% Row Count 29 (+ 2)
% Row 12
\SetRowColor{LightBackground}
{\bf{Show route to destination}} & \{\{noshy\}\}traceroute {\bf{{\emph{\textless{}ip\textgreater{}}}}} \tn 
% Row Count 31 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{15.543 cm} p{1.727 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Octal Permissions}}  \tn
% Row 0
\SetRowColor{LightBackground}
\{\{width=30\}\}{\bf{Read}} & 4 \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
{\bf{Write}} & 2 \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
{\bf{Execute}} & 1 \tn 
% Row Count 3 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{17.67cm}}{For multiple permissions, just add the octal values. Example: read(4) and execute(1) = 5. \newline  \newline More about it: \{\{link="https://www.redhat.com/sysadmin/linux-file-permissions-explained"\}\}Linux file permissions explained \{\{/link\}\}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{8.635 cm} x{8.635 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Remote Access}}  \tn
% Row 0
\SetRowColor{LightBackground}
\{\{width=30\}\}{\bf{Connect via SSH using password}} & ssh -p {\bf{{\emph{\textless{}port\textgreater{}}}}} {\bf{{\emph{\textless{}username\textgreater{}}}}}@{\bf{{\emph{\textless{}hostname/ip\textgreater{}}}}} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
{\bf{Copy file from local to remote using SCP}} & scp -P {\bf{{\emph{\textless{}port\textgreater{}}}}} {\bf{{\emph{\textless{}local\_file\_path\textgreater{}}}}} {\bf{{\emph{\textless{}username\textgreater{}}}}}@{\bf{{\emph{\textless{}hostname/ip\textgreater{}}}}}:{\bf{{\emph{\textless{}destination folder/file\textgreater{}}}}} \tn 
% Row Count 9 (+ 6)
% Row 2
\SetRowColor{LightBackground}
{\bf{Copy file from remote to local using SCP}} & scp -P {\bf{{\emph{\textless{}port\textgreater{}}}}} {\bf{{\emph{\textless{}username\textgreater{}}}}}@{\bf{{\emph{\textless{}hostname/ip\textgreater{}}}}}:{\bf{{\emph{\textless{}file\_path\textgreater{}}}}} {\bf{{\emph{\textless{}destination folder/file\textgreater{}}}}} \tn 
% Row Count 15 (+ 6)
% Row 3
\SetRowColor{white}
{\bf{Copy file from local to remote using rsync}} & rsync -avz -e "ssh -p {\bf{{\emph{\textless{}port\textgreater{}}}}}" {\bf{{\emph{\textless{}local file/folder\textgreater{}}}}} {\bf{{\emph{\textless{}username\textgreater{}}}}}@{\bf{{\emph{\textless{}hostname/ip\textgreater{}}}}}:{\bf{{\emph{\textless{}destination folder/file\textgreater{}}}}} \tn 
% Row Count 22 (+ 7)
% Row 4
\SetRowColor{LightBackground}
{\bf{Copy file from remote to local using rsync}} & rsync -avz -e "ssh -p {\bf{{\emph{\textless{}port\textgreater{}}}}}" {\bf{{\emph{\textless{}username\textgreater{}}}}}@{\bf{{\emph{\textless{}hostname/ip\textgreater{}}}}}:{\bf{{\emph{\textless{}folder/file\textgreater{}}}}} {\bf{{\emph{\textless{}destination folder/file\textgreater{}}}}} \tn 
% Row Count 29 (+ 7)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{17.67cm}}{\textasciicircum{}1\textasciicircum{} Prefer using rsync instead of SCP since it will be deprecated soon. Check references for more information.  \newline \textasciicircum{}2\textasciicircum{} For key authentication with SSH, SCP or RSYNC add a `-i {\bf{\textless{}key\_file\textgreater{}}}` after the SSH or SCP command. I.e: `{\emph{ssh -i /home/foo/key.rsa ...}}`. \newline  \newline {\bf{References}} \newline \{\{link="https://www.redhat.com/en/blog/openssh-scp-deprecation-rhel-9-what-you-need-know"\}\}OpenSSH SCP deprecation in RHEL 9\{\{/link\}\}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{6.7353 cm} x{10.5347 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{User Management}}  \tn
% Row 0
\SetRowColor{LightBackground}
\{\{width=30\}\}{\bf{Add user}} & useradd -s {\bf{{\emph{\textless{}shell\textgreater{}}}}} -d {\bf{{\emph{\textless{}user\_home\textgreater{}}}}} -m -U {\bf{{\emph{\textless{}username\textgreater{}}}}} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
{\bf{Add User to Group}} & usermod -aG {\bf{{\emph{\textless{}group\_name\textgreater{}}}}} {\bf{{\emph{\textless{}user\_name\textgreater{}}}}} \tn 
% Row Count 5 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{Remove user from group}} & deluser {\bf{{\emph{\textless{}group\_name\textgreater{}}}}} {\bf{{\emph{\textless{}user\_name\textgreater{}}}}} \tn 
% Row Count 7 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{Delete User}} & userdel -f -r {\bf{{\emph{\textless{}user\_name\textgreater{}}}}} \tn 
% Row Count 9 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\bf{Add group}} & groupadd {\bf{{\emph{\textless{}group\_name\textgreater{}}}}} \tn 
% Row Count 11 (+ 2)
% Row 5
\SetRowColor{white}
{\bf{Delete group}} & groupdel {\bf{{\emph{\textless{}group\_name\textgreater{}}}}} \tn 
% Row Count 13 (+ 2)
% Row 6
\SetRowColor{LightBackground}
{\bf{List user groups}} & groups {\bf{{\emph{\textless{}user\_name\textgreater{}}}}} \tn 
% Row Count 15 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}



\end{document}