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% Packages
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\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{mrenesca}
\pdfinfo{
  /Title (linux-troubleshooting-cheat-sheet.pdf)
  /Creator (Cheatography)
  /Author (mrenesca)
  /Subject (Linux Troubleshooting Cheat Sheet)
}

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% This two commands together give roughly
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% Commands
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% Header and Footer
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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}}
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\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Linux Troubleshooting Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{mrenesca} via \textcolor{DarkBackground}{\uline{cheatography.com/216356/cs/47253/}}}
\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}mrenesca \\
  \uline{cheatography.com/mrenesca} \\
  \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 30th October, 2025.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
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  \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*}{3}

\begin{tabularx}{5.377cm}{x{2.23965 cm} x{2.73735 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Disk Usage Commands}}  \tn
% Row 0
\SetRowColor{LightBackground}
df -h & Check free and use space on mounted systems. \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
df -i & Show free inodes on mounted file systems. \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
fdisk -l & Display disk partitions, sizes, and types with the command. \tn 
% Row Count 7 (+ 3)
% Row 3
\SetRowColor{white}
du -ah & See disk usage for all files and directories. \tn 
% Row Count 10 (+ 3)
% Row 4
\SetRowColor{LightBackground}
du -sh & Show disk usage of the current directory. \tn 
% Row Count 12 (+ 2)
% Row 5
\SetRowColor{white}
mount & Show currently mounted file systems. \tn 
% Row Count 14 (+ 2)
% Row 6
\SetRowColor{LightBackground}
findmnt & Display target mount point for all file systems. \tn 
% Row Count 17 (+ 3)
% Row 7
\SetRowColor{white}
mount {[}device\_path{]} {[}mount\_point{]} & Mount a device. \tn 
% Row Count 19 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Services that are on and off Commands}}  \tn
% Row 0
\SetRowColor{LightBackground}
service -{}-status-all & List all services. \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
systemctl list-units -{}-type=service & List all services. \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
systemctl list-units -{}-type=service -{}-all & List all services. \tn 
% Row Count 6 (+ 3)
% Row 3
\SetRowColor{white}
systemctl list-units -{}-type=service -{}-state=running & List all running services. \tn 
% Row Count 9 (+ 3)
% Row 4
\SetRowColor{LightBackground}
systemctl list-units -a -{}-state=active & List all active services. \tn 
% Row Count 11 (+ 2)
% Row 5
\SetRowColor{white}
systemctl list-units -a -{}-state=inactive & List inactive service units. \tn 
% Row Count 13 (+ 2)
% Row 6
\SetRowColor{LightBackground}
systemctl list-units -{}-state=failed & List failed services for troubleshooting. \tn 
% Row Count 16 (+ 3)
% Row 7
\SetRowColor{white}
systemctl list-unit-files -{}-type=service -{}-state=enabled & Show services enabled on Linux boot. \tn 
% Row Count 19 (+ 3)
% Row 8
\SetRowColor{LightBackground}
sudo systemctl list-units -{}-type=service -{}-state=exited & List every loaded service that is in the exited state. \tn 
% Row Count 22 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.18988 cm} x{2.78712 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Memory Usage Commands}}  \tn
% Row 0
\SetRowColor{LightBackground}
lscpu & See CPU information. \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
lsblk & See information about block devices. \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
lspci -tv & Show PCI devices (graphics card, network card, etc.) in a tree-like diagram. \tn 
% Row Count 7 (+ 4)
% Row 3
\SetRowColor{white}
lsusb -tv & Display USB devices in a tree-like diagram. \tn 
% Row Count 9 (+ 2)
% Row 4
\SetRowColor{LightBackground}
lshw & List hardware configuration information. \tn 
% Row Count 11 (+ 2)
% Row 5
\SetRowColor{white}
cat /proc/cpuinfo & Show detailed CPU information. \tn 
% Row Count 13 (+ 2)
% Row 6
\SetRowColor{LightBackground}
cat /proc/meminfo & View detailed system memory information. \tn 
% Row Count 15 (+ 2)
% Row 7
\SetRowColor{white}
cat /proc/mounts & See mounted file systems. \tn 
% Row Count 17 (+ 2)
% Row 8
\SetRowColor{LightBackground}
free -h & Display free and used memory. \tn 
% Row Count 19 (+ 2)
% Row 9
\SetRowColor{white}
sudo dmidecode & Show hardware information from the BIOS. \tn 
% Row Count 21 (+ 2)
% Row 10
\SetRowColor{LightBackground}
hdparm -i /dev/{[}device\_name{]} & Display disk data information. \tn 
% Row Count 23 (+ 2)
% Row 11
\SetRowColor{white}
hdparm -tT /dev/{[}device\_name{]} & Conduct a read speed test on the device/disk. \tn 
% Row Count 26 (+ 3)
% Row 12
\SetRowColor{LightBackground}
badblocks -s /dev/{[}device\_name{]} & Test for unreadable blocks on the device/disk. \tn 
% Row Count 29 (+ 3)
% Row 13
\SetRowColor{white}
fsck /dev/{[}device\_name{]} & Run a disk check on an unmounted disk or partition. \tn 
% Row Count 32 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.94103 cm} x{3.03597 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Running Processes Commands}}  \tn
% Row 0
\SetRowColor{LightBackground}
ps & List active processes. \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
pstree & Show processes in a tree-like diagram. \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
pmap & Display a memory usage map of processes. \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
top & See all running processes. \tn 
% Row Count 7 (+ 2)
% Row 4
\SetRowColor{LightBackground}
htop & Interactive and colorful process viewer. \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
kill {[}process\_id{]} & Terminate a Linux process under a given ID. \tn 
% Row Count 11 (+ 2)
% Row 6
\SetRowColor{LightBackground}
pkill {[}process\_name{]} & Terminate a process under a specific name. \tn 
% Row Count 13 (+ 2)
% Row 7
\SetRowColor{white}
killall {[}label{]} & Terminate all processes with a given label. \tn 
% Row Count 15 (+ 2)
% Row 8
\SetRowColor{LightBackground}
prgrep {[}keyword{]} & List processes based on the provided keyword. \tn 
% Row Count 17 (+ 2)
% Row 9
\SetRowColor{white}
pidof {[}process\_name{]} & Show the PID of a process. \tn 
% Row Count 19 (+ 2)
% Row 10
\SetRowColor{LightBackground}
bg & List and resume stopped jobs in the background. \tn 
% Row Count 21 (+ 2)
% Row 11
\SetRowColor{white}
fg & Bring the most recently suspended job to the foreground. \tn 
% Row Count 24 (+ 3)
% Row 12
\SetRowColor{LightBackground}
fg {[}job{]} & Bring a particular job to the foreground. \tn 
% Row Count 26 (+ 2)
% Row 13
\SetRowColor{white}
lsof & List files opened by running processes with lsof command. \tn 
% Row Count 29 (+ 3)
% Row 14
\SetRowColor{LightBackground}
trap "{[}commands{]}" {[}signal{]} & Catch a system error signal in a shell script. Executes provided commands when the signal is caught. \tn 
% Row Count 34 (+ 5)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{x{1.94103 cm} x{3.03597 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Running Processes Commands (cont)}}  \tn
% Row 15
\SetRowColor{LightBackground}
wait & Pause the terminal or a Bash script until a running process is completed. \tn 
% Row Count 4 (+ 4)
% Row 16
\SetRowColor{white}
nohup {[}command{]} \& & Run a Linux process in the background. \tn 
% Row Count 6 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}