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% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
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% Document Info
\author{Heisere}
\pdfinfo{
  /Title (system-admin-cs.pdf)
  /Creator (Cheatography)
  /Author (Heisere)
  /Subject (System Admin CS Cheat Sheet)
}

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\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
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    {\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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\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{System Admin CS Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Heisere} via \textcolor{DarkBackground}{\uline{cheatography.com/89610/cs/20395/}}}
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\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
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  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}Heisere \\
  \uline{cheatography.com/heisere} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 13th February, 2020.\\
   Updated 12th December, 2019.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
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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{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{ERROR checking}}  \tn
% Row 0
\SetRowColor{LightBackground}
sudo apt update \&\& sudo apt upgrade -y & upgrades your machine with all tools completely \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
0 & passes \tn 
% Row Count 4 (+ 1)
% Row 2
\SetRowColor{LightBackground}
any number other than 0 & is a fail error \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
test -d /tmp/temp\_dir test\_rc=\$? & check to see if directory was created \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
echo "mkdir resulted in \$\{mkdir\_rc\}, test resulted in \$\{test\_rc\}." & check return codes \tn 
% Row Count 12 (+ 4)
% Row 5
\SetRowColor{white}
true \&\& echo "We get here because the first part is true!" true || echo "We never see this because the first part is true :(" & Check out how an exit status of 0 affects the logical operators: \tn 
% Row Count 19 (+ 7)
% Row 6
\SetRowColor{LightBackground}
false \&\& echo "Since we only continue after \&\& with an exit status of 0, this is never printed." false || echo "Because we only continue after || with a return code that is not 0, we see this!" & Check out how an exit status of 1 affects the logical operators: \tn 
% Row Count 29 (+ 10)
% Row 7
\SetRowColor{white}
if {[}{[} \$\# -ne 3 {]}{]}; then   echo "Incorrect usage!"   echo "Usage: \$0 \textless{}directory\_name\textgreater{} \textless{}file\_name\textgreater{} \textless{}file\_content\textgreater{}"   exit 1 fi & We need exactly three arguments, check how many have been passed to  \# the script. \tn 
% Row Count 36 (+ 7)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{ERROR checking (cont)}}  \tn
% Row 8
\SetRowColor{LightBackground}
directory\_name=\$1 file\_name=\$2 file\_content=\$3 & Save the arguments into variables. \tn 
% Row Count 3 (+ 3)
% Row 9
\SetRowColor{white}
absolute\_file\_path=\$\{directory\_name\}/\$\{file\_name\} & create absolute path \tn 
% Row Count 6 (+ 3)
% Row 10
\SetRowColor{LightBackground}
if {[}{[} ! -d \$\{directory\_name\} {]}{]}; then   mkdir \$\{directory\_name\} || \{ echo "Cannot create directory, exiting script!"; exit 1; \} fi & Check if the directory exists; otherwise, try to create it. \tn 
% Row Count 13 (+ 7)
% Row 11
\SetRowColor{white}
if {[}{[} ! -f \$\{absolute\_file\_path\} {]}{]}; then   touch \$\{absolute\_file\_path\} || \{ echo "Cannot create file, exiting script!"; exit 1; \} fi & Try to create the file, if it does not exist. \tn 
% Row Count 20 (+ 7)
% Row 12
\SetRowColor{LightBackground}
echo \$\{file\_content\} \textgreater{} \$\{absolute\_file\_path\} & File has been created, echo the content to it. \tn 
% Row Count 23 (+ 3)
% Row 13
\SetRowColor{white}
cp /var/log/dpkg.log dpkg || \{ echo "Cannot copy dpkg.log to the new directory."; exit 1; \} & Copy the log file to our new directory. \tn 
% Row Count 28 (+ 5)
% Row 14
\SetRowColor{LightBackground}
cd \$(dirname \$0) & Change directory to the script location. \tn 
% Row Count 30 (+ 2)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{ERROR checking (cont)}}  \tn
% Row 15
\SetRowColor{LightBackground}
cp /var/log/dpkg.log dpkg || \{ echo "Cannot copy dpkg.log to the new directory."; exit 1; \} & Copy the log file to our new directory. \tn 
% Row Count 5 (+ 5)
% Row 16
\SetRowColor{white}
if {[}{[} \$\# -ne 1 {]}{]}; then   echo "Incorrect usage!"   echo "Usage: \$0 \textless{}file or directory path\textgreater{}"   exit 1 fi & input validation \tn 
% Row Count 11 (+ 6)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.14011 cm} x{2.83689 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{git keeper}}  \tn
% Row 0
\SetRowColor{LightBackground}
git clone \textless{}url\textgreater{} & copies url to directory \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
git add \textless{}file\textgreater{} & keep track of git file \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
git commit -am "done" & makes version of thing \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
git push & pushes version to git server \tn 
% Row Count 7 (+ 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}{for loop}}  \tn
% Row 0
\SetRowColor{LightBackground}
for word in \$\{words\}; do   echo "The word is: \$\{word\}" done & for loop example \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
" " & bash keep spaces together also prevents asterisk from being expanded \tn 
% Row Count 7 (+ 4)
% Row 2
\SetRowColor{LightBackground}
' ' & no variables will be replaced in single quotes plus what double quotes do \tn 
% Row Count 11 (+ 4)
\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}{Setting up Samba for file sharing}}  \tn
% Row 0
\SetRowColor{LightBackground}
\$ sudo yum install samba samba-client samba-common & install samba \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\$ sudo cp /etc/samba/smb.conf \seqsplit{/etc/samba/smb.conf.backup} & backup at each stage \tn 
% Row Count 6 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\$ sudo mkdir /SharedFolder/ \$ sudo chmod -R 755 /SharedFolder/ & grant user permissions \tn 
% Row Count 10 (+ 4)
% Row 3
\SetRowColor{white}
\$ sudo firewall-cmd -{}-add-service=samba \$ sudo firewall-cmd -{}-reload & get past firewall \tn 
% Row Count 14 (+ 4)
% Row 4
\SetRowColor{LightBackground}
\$ sudo nano /etc/samba/smb.conf & configure samba file \tn 
% Row Count 16 (+ 2)
% Row 5
\SetRowColor{white}
\$ sudo smbpasswd –a \textless{}user\textgreater{} & create user \tn 
% Row Count 18 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\$ sudo systemctl enable smb.service \$ sudo systemctl enable nmb.service \$ sudo systemctl start smb.service \$ sudo systemctl start nmb.service & start service \tn 
% Row Count 26 (+ 8)
% Row 7
\SetRowColor{white}
\$testparm -v & listing of all the Samba configuration options and the values to which they are currently set \tn 
% Row Count 31 (+ 5)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Setting up Samba for file sharing (cont)}}  \tn
% Row 8
\SetRowColor{LightBackground}
\$sudo smbpasswd -a \textless{}user\textgreater{} & set up password for user \tn 
% Row Count 2 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.93643 cm} x{2.04057 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{ARRAYS}}  \tn
% Row 0
\SetRowColor{LightBackground}
ARRAY=(hi "how are" you) & set values \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
echo \$\{ARRAY{[}*{]}\} & list variables in array \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
for x in "\$\{ARRAY{[}@{]}\}";do echo \$x; done & list variables in new lines \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
unset ARRAY{[}variable{]} & remove variable \tn 
% Row Count 7 (+ 1)
% Row 4
\SetRowColor{LightBackground}
ARRAY+=("bland" "hello") & add variables \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
echo \$\{\#ARRAY\} & get length of array \tn 
% Row Count 11 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\$\{VAR:-WORD\} & substitute variable \tn 
% Row Count 13 (+ 2)
% Row 7
\SetRowColor{white}
"\$@" & shift variables \tn 
% Row Count 14 (+ 1)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{declare -A aa} \tn 
% Row Count 15 (+ 1)
% Row 9
\SetRowColor{white}
\$\{VAR/PATTERN/STRING\} & replace parts of a variable \tn 
% Row Count 17 (+ 2)
% Row 10
\SetRowColor{LightBackground}
\$\{VAR:OFFSET:LENGTH\} & remove substring \tn 
% Row Count 18 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{4.13091 cm} x{0.84609 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{general}}  \tn
% Row 0
\SetRowColor{LightBackground}
lists the contents of files to the terminal window & cat \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
give your own name to a command or sequence of commands & alias \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
information and files from Uniform Resource Locators (URLs) or internet addresses & curl \tn 
% Row Count 7 (+ 3)
% Row 3
\SetRowColor{white}
shows the size, used space, and available space on the mounted filesystems of your computer & df \tn 
% Row Count 10 (+ 3)
% Row 4
\SetRowColor{LightBackground}
compares two text files and shows the differences between them & diff \tn 
% Row Count 12 (+ 2)
% Row 5
\SetRowColor{white}
close a terminal window & exit \tn 
% Row Count 13 (+ 1)
% Row 6
\SetRowColor{LightBackground}
gives you a short dump of information about a user, including the time of the user's last login, the user's home directory, and the user account's full name & \seqsplit{finger} \tn 
% Row Count 18 (+ 5)
% Row 7
\SetRowColor{white}
summary of the memory usage with your computer. & free \tn 
% Row Count 20 (+ 2)
% Row 8
\SetRowColor{LightBackground}
tells you which groups a user is a member of & \seqsplit{groups} \tn 
% Row Count 22 (+ 2)
% Row 9
\SetRowColor{white}
compresses files & gzip \tn 
% Row Count 23 (+ 1)
% Row 10
\SetRowColor{LightBackground}
gives you a listing of the first 10 lines of a file & head \tn 
% Row Count 25 (+ 2)
% Row 11
\SetRowColor{white}
terminate a process from the command line & kill \tn 
% Row Count 27 (+ 2)
% Row 12
\SetRowColor{LightBackground}
view files without opening an editor & less \tn 
% Row Count 29 (+ 2)
% Row 13
\SetRowColor{white}
verify that you have network connectivity with another network device & ping \tn 
% Row Count 32 (+ 3)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{x{4.13091 cm} x{0.84609 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{general (cont)}}  \tn
% Row 14
\SetRowColor{LightBackground}
lists running processes & ps \tn 
% Row Count 1 (+ 1)
% Row 15
\SetRowColor{white}
shut down or reboot your Linux system & \seqsplit{shutdown} \tn 
% Row Count 3 (+ 2)
% Row 16
\SetRowColor{LightBackground}
listing of the last 10 lines of a file & tail \tn 
% Row Count 5 (+ 2)
% Row 17
\SetRowColor{white}
create an archive file & tar \tn 
% Row Count 6 (+ 1)
% Row 18
\SetRowColor{LightBackground}
real-time display of the data relating to your Linux machine. & top \tn 
% Row Count 8 (+ 2)
% Row 19
\SetRowColor{white}
obtain some system information regarding the Linux computer you're working on & uname \tn 
% Row Count 11 (+ 3)
% Row 20
\SetRowColor{LightBackground}
lists the currently logged in users. & w \tn 
% Row Count 13 (+ 2)
% Row 21
\SetRowColor{white}
find out who you are logged in as or who is logged into an unmanned Linux terminal. & \seqsplit{whoami} \tn 
% Row Count 16 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.4931 cm} x{3.4839 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Add users}}  \tn
% Row 0
\SetRowColor{LightBackground}
add user & sudo useradd \textless{}username\textgreater{} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
add user password & sudo smbpasswd -a \textless{}username\textgreater{} \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
Add Admin & sudo useradd -g wheel \textless{}lastnamefirstletter\textgreater{} \tn 
% Row Count 5 (+ 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}{Installing and setting up samba}}  \tn
% Row 0
\SetRowColor{LightBackground}
check samba is not running & ps ax | egrep \seqsplit{"samba|smbd|nmbd|winbindd} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
delete any samba files that are already on the system & smbd -b | grep "CONFIGFILE" and smbd -b | egrep \seqsplit{"LOCKDIR|STATEDIR|CACHEDIR|PRIVATE\_DIR";} delete any files that these commands find \tn 
% Row Count 9 (+ 7)
% Row 2
\SetRowColor{LightBackground}
provision Samba AD. We'll want to do it interactively so our password can't be seen & samba-tool domain provision -{}-use-rfc2307 -{}-interactive \tn 
% Row Count 14 (+ 5)
% Row 3
\SetRowColor{white}
for the requests: & Realm: \seqsplit{SAP.CSLAB.MORAVIAN.EDU} Domain: SAP Server Role: dc DNS backend: SAMBA\_INTERNAL \tn 
% Row Count 19 (+ 5)
% Row 4
\SetRowColor{LightBackground}
Set your hostname to our domain: & hostname \seqsplit{sap.cslab.moravian.edu} hostname -b \seqsplit{sap.cslab.moravian.edu} \tn 
% Row Count 23 (+ 4)
% Row 5
\SetRowColor{white}
Now enable samba and make it sure it will run at boot: & sudo systemctl start samba sudo systemctl enable samba \tn 
% Row Count 26 (+ 3)
\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}{virtual environments}}  \tn
% Row 0
\SetRowColor{LightBackground}
python3 -m venv \seqsplit{/path/to/new/virtual/environment} & create new virtual environment \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
-h, -{}-help & man pages for environments \tn 
% Row Count 5 (+ 2)
% Row 2
\SetRowColor{LightBackground}
-{}-system-site-packages & Give the virtual environment access to the system site-packages dir. \tn 
% Row Count 9 (+ 4)
% Row 3
\SetRowColor{white}
-{}-symlinks & Try to use symlinks rather than copies, when symlinks are not the default for the platform. \tn 
% Row Count 14 (+ 5)
% Row 4
\SetRowColor{LightBackground}
-{}-copies & Try to use copies rather than symlinks, even when symlinks are the default for the platform. \tn 
% Row Count 19 (+ 5)
% Row 5
\SetRowColor{white}
-{}-clear & Delete the contents of the environment directory if it already exists, before environment creation. \tn 
% Row Count 24 (+ 5)
% Row 6
\SetRowColor{LightBackground}
-{}-upgrade & Upgrade the environment directory to use this version of Python, assuming Python has been upgraded in-place. \tn 
% Row Count 30 (+ 6)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{virtual environments (cont)}}  \tn
% Row 7
\SetRowColor{LightBackground}
-{}-without-pip & Skips installing or upgrading pip in the virtual environment (pip is bootstrapped by default) \tn 
% Row Count 5 (+ 5)
% Row 8
\SetRowColor{white}
-{}-prompt PROMPT & Provides an alternative prompt prefix for this environment. \tn 
% Row Count 8 (+ 3)
% Row 9
\SetRowColor{LightBackground}
\textless{}source\textgreater{} \textless{}dir\textgreater{}/bin/activate/ & activate virtual env \tn 
% Row Count 10 (+ 2)
% Row 10
\SetRowColor{white}
pip install \textless{}some project\textgreater{} & install a project \tn 
% Row Count 12 (+ 2)
% Row 11
\SetRowColor{LightBackground}
pip install -r requirements.txt & install required files \tn 
% Row Count 14 (+ 2)
\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}{Files and Directories}}  \tn
% Row 0
\SetRowColor{LightBackground}
ls & to hide files \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
ls -a & shows all files in current folder \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
ls .. & look in directory \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
ls ../.. -a & look in directory above \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
ls -a .. & look in hidden directory \tn 
% Row Count 6 (+ 1)
% Row 5
\SetRowColor{white}
./ & run program from current folder \tn 
% Row Count 8 (+ 2)
% Row 6
\SetRowColor{LightBackground}
pwd & present working directory \tn 
% Row Count 10 (+ 2)
% Row 7
\SetRowColor{white}
tab & completes command \tn 
% Row Count 11 (+ 1)
% Row 8
\SetRowColor{LightBackground}
\textgreater{} & moves files somewhere else \tn 
% Row Count 13 (+ 2)
% Row 9
\SetRowColor{white}
rm \textasciitilde{}/\textless{}filename\textgreater{} & delete file \tn 
% Row Count 14 (+ 1)
% Row 10
\SetRowColor{LightBackground}
rm -r \textless{}dir\textgreater{} & delete directories \tn 
% Row Count 15 (+ 1)
% Row 11
\SetRowColor{white}
mk dir & create directories \tn 
% Row Count 16 (+ 1)
% Row 12
\SetRowColor{LightBackground}
wget \textless{}folder\textgreater{} & download folder \tn 
% Row Count 17 (+ 1)
% Row 13
\SetRowColor{white}
tar -xzf \textless{}folder\textgreater{}.tar.gz & unpack folder \tn 
% Row Count 19 (+ 2)
% Row 14
\SetRowColor{LightBackground}
cd \textless{}directory\textgreater{} & change directory \tn 
% Row Count 20 (+ 1)
% Row 15
\SetRowColor{white}
cd \textbackslash{} & go to home directory \tn 
% Row Count 21 (+ 1)
% Row 16
\SetRowColor{LightBackground}
mv & move \tn 
% Row Count 22 (+ 1)
% Row 17
\SetRowColor{white}
History | grep \textless{}command\textgreater{} & find commands with \textless{}command\textgreater{} in it \tn 
% Row Count 24 (+ 2)
% Row 18
\SetRowColor{LightBackground}
-f & to follow code to the end \tn 
% Row Count 26 (+ 2)
% Row 19
\SetRowColor{white}
-f -u \textless{}unit\textgreater{} & filter by the type of unit \tn 
% Row Count 28 (+ 2)
% Row 20
\SetRowColor{LightBackground}
!\textless{}number\textgreater{} & repeat command on line \tn 
% Row Count 29 (+ 1)
% Row 21
\SetRowColor{white}
script & everything that happened in a session \tn 
% Row Count 31 (+ 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}{ports an firewalls}}  \tn
% Row 0
\SetRowColor{LightBackground}
firewall-cmd -{}-permanent -{}-add-port=\textless{}port\#\textgreater{}/tcp & add port \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
firewall-cmd -{}-reload & reboot port \tn 
% Row Count 5 (+ 2)
% Row 2
\SetRowColor{LightBackground}
firewall-cmd -{}-list-ports & list ports \tn 
% Row Count 7 (+ 2)
% Row 3
\SetRowColor{white}
firewall-cmd -{}-permanent -{}-add-service=http & use predefined service instead of port \# \tn 
% Row Count 10 (+ 3)
% Row 4
\SetRowColor{LightBackground}
sudo tcpdump -a -c 1000 & looks for the past 1000 connections within server \tn 
% Row Count 13 (+ 3)
% Row 5
\SetRowColor{white}
ifconfig & show local ip \tn 
% Row Count 14 (+ 1)
\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}{Network Diagnostic Tools}}  \tn
% Row 0
\SetRowColor{LightBackground}
ping \textless{}webaddress\textgreater{} or \textless{}IP\textgreater{} & tracks the time the round trip took to server \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
ping -s \textless{}number\textgreater{} & try a packet of \textless{}number\textgreater{} \tn 
% Row Count 5 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{/path/to/traceroot} \textless{}webaddress\textgreater{} & shows whether it can reach a host, but also the route it takes \tn 
% Row Count 8 (+ 3)
% Row 3
\SetRowColor{white}
dig & queries DNS servers and returns the information held about a particular domain. \tn 
% Row Count 12 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.14471 cm} x{3.83229 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Set up SMB}}  \tn
% Row 0
\SetRowColor{LightBackground}
go to file & sudo nano /etc/samba/smb.conf \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
input values & {[}homes{]}         comment = Home Directories         browsable = no         writeable = yes         valid users = sap.cslab.moravian.edu\textbackslash{}\%S   {[}printers{]}         comment = All Printers         path = /var/spool/samba         browsable = no         guest ok = no         writeable = no         printable = yes \tn 
% Row Count 13 (+ 11)
% Row 2
\SetRowColor{LightBackground}
run & sudo setsebool -P \seqsplit{samba\_enable\_home\_dirs} on \tn 
% Row Count 15 (+ 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}{Set  up DHCP}}  \tn
% Row 0
\SetRowColor{LightBackground}
Setting up Static IP on Server (For DHCP) & ip addr add 192.168.114.1 dev br0; \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
Setting up Bridging & sudo dnf install bridge-utils sudo brctl addbr br0 sudo brctl addif enp1s0 sudo brctl addif eno1 sudo ifconfig br0 up \tn 
% Row Count 9 (+ 6)
% Row 2
\SetRowColor{LightBackground}
DHCP Config & subnet 192.168.114.0 netmask 255.255.255.0 \{ range 192.168.114.1 192.168.114.255; option subnet-mask 255.255.255.0; option routers 192.168.114.1; option broadcast-address 192.168.114.255; default-lease-time 600; max-lease-time 7200; host interface0 \{   hardware ethernet 54:04:a6:3f:85:35;   fixed-address 192.168.114.1;               \} \} \tn 
% Row Count 26 (+ 17)
% Row 3
\SetRowColor{white}
DHCP Config pt.2 & \seqsplit{/etc/sysconfig/network-scripts/ifcfg-eno1:} \tn 
% Row Count 29 (+ 3)
% Row 4
\SetRowColor{LightBackground}
DHCP Config pt.3 & DEVICE=eno1 BOOTPROTO:dhcp TYPE: ethernet \seqsplit{ipaddr=192.168.114.1} ONBOOT=yes \tn 
% Row Count 33 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.84149 cm} x{3.13551 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Permissions and Owners}}  \tn
% Row 0
\SetRowColor{LightBackground}
ls -l & view permissions of files and directories \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
./\textless{}filename\textgreater{} & execute file \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{chmod +x \textless{}filename\textgreater{}} \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
ls -l & added permission to execute file \tn 
% Row Count 6 (+ 2)
% Row 4
\SetRowColor{LightBackground}
chown bin & changes ownership of file(can only be used by root) \tn 
% Row Count 9 (+ 3)
% Row 5
\SetRowColor{white}
chgrp bin & changes group \tn 
% Row Count 10 (+ 1)
% Row 6
\SetRowColor{LightBackground}
chmod -x \textless{}filename\textgreater{} & removed permission to execute file \tn 
% Row Count 12 (+ 2)
% Row 7
\SetRowColor{white}
chmod u+x \textless{}filename\textgreater{} & assign execute permission to yourself only \tn 
% Row Count 14 (+ 2)
% Row 8
\SetRowColor{LightBackground}
chmod ug+rwx \textless{}filename\textgreater{} & assign read, write, execute permission to user and group \tn 
% Row Count 17 (+ 3)
% Row 9
\SetRowColor{white}
etc /shadow & can only be run by root \tn 
% Row Count 18 (+ 1)
% Row 10
\SetRowColor{LightBackground}
chmod -R & recursive \tn 
% Row Count 19 (+ 1)
% Row 11
\SetRowColor{white}
history & show all command history \tn 
% Row Count 20 (+ 1)
% Row 12
\SetRowColor{LightBackground}
adduser & adds user \tn 
% Row Count 21 (+ 1)
\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}{Cups printer}}  \tn
% Row 0
\SetRowColor{LightBackground}
set up cups & lpadmin -p laserjet -L "Printer" -v \seqsplit{usb://HP/LaserJet\%202200}?serial=00USBGJ02797 \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
list the available backends and printers & lpinfo -v \tn 
% Row Count 6 (+ 2)
% Row 2
\SetRowColor{LightBackground}
The Bonjour (DNS-SD) protocol. & dnssd \tn 
% Row Count 8 (+ 2)
% Row 3
\SetRowColor{white}
The Internet Printing Protocol (IPP) with optional encryption. & ipp \tn 
% Row Count 12 (+ 4)
% Row 4
\SetRowColor{LightBackground}
The Internet Printing Protocol with mandatory encryption. & ipps \tn 
% Row Count 15 (+ 3)
% Row 5
\SetRowColor{white}
The Line Printer Daemon protocol & lpd: \tn 
% Row Count 17 (+ 2)
% Row 6
\SetRowColor{LightBackground}
The AppSocket (JetDirect) protocol. & socket \tn 
% Row Count 19 (+ 2)
% Row 7
\SetRowColor{white}
Set printer & lpadmin -p printername -v device-uri \tn 
% Row Count 21 (+ 2)
% Row 8
\SetRowColor{LightBackground}
aborts jobs. on printer & abort-job \tn 
% Row Count 23 (+ 2)
% Row 9
\SetRowColor{white}
Enables/disables per-printer sharing & -o \seqsplit{printer-is-shared=true/false} \tn 
% Row Count 25 (+ 2)
% Row 10
\SetRowColor{LightBackground}
Enables sharing of printers with other computers and mobile devices on your local network. & -{}-share-printers \tn 
% Row Count 30 (+ 5)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Cups printer (cont)}}  \tn
% Row 11
\SetRowColor{LightBackground}
Expands printer sharing to any network that can reach your server. & -{}-remote-any \tn 
% Row Count 4 (+ 4)
% Row 12
\SetRowColor{white}
create, modify, or delete a class & lpadmin -p printername -c classname \tn 
% Row Count 6 (+ 2)
% Row 13
\SetRowColor{LightBackground}
printer is removed from the class & lpadmin -p printername -r classname \tn 
% Row Count 8 (+ 2)
% Row 14
\SetRowColor{white}
deletes the named class & lpadmin -x classname \tn 
% Row Count 10 (+ 2)
% Row 15
\SetRowColor{LightBackground}
enable debug logging & cupsctl -{}-debug-logging \tn 
% Row Count 12 (+ 2)
% Row 16
\SetRowColor{white}
disable debug logging & cupsctl -{}-no-debug-logging \tn 
% Row Count 14 (+ 2)
% Row 17
\SetRowColor{LightBackground}
creates a destination for a printer at IP address 11.22.33.44 & lpadmin -p printername -E -v \seqsplit{ipp://11.22.33.44/ipp/print} -m everywhere \tn 
% Row Count 18 (+ 4)
% Row 18
\SetRowColor{white}
creates a destination for a HP LaserJet printer at IP address 11.22.33.44 & lpadmin -p printername -E -v \seqsplit{socket://11.22.33.44} -m \seqsplit{drv:///sample.drv/laserjet.ppd} \tn 
% Row Count 23 (+ 5)
\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}{SSH}}  \tn
% Row 0
\SetRowColor{LightBackground}
\$ ssh -l \textless{}account name\textgreater{} \textless{}remote system\textgreater{} & log in \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\$ ssh \textless{}account name\textgreater{}@\textless{}remote system\textgreater{} & log in \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\$ ssh \textless{}remote system\textgreater{} & log in if on same local and remote system \tn 
% Row Count 7 (+ 3)
% Row 3
\SetRowColor{white}
\$ ssh -l \textless{}account name\textgreater{} \textless{}remote system\textgreater{} rm \textless{}absolute path name\textgreater{} & run a single command \tn 
% Row Count 11 (+ 4)
% Row 4
\SetRowColor{LightBackground}
\$ scp \textless{}file name\textgreater{} \textless{}account name\textgreater{}@\textless{}remote server\textgreater{}: & copy files from local to remote \tn 
% Row Count 14 (+ 3)
% Row 5
\SetRowColor{white}
\$ scp \textless{}account name\textgreater{}@\textless{}remote system\textgreater{}:\textless{}file name\textgreater{} . & copy files from remote to local \tn 
% Row Count 17 (+ 3)
% Row 6
\SetRowColor{LightBackground}
\$ scp -r \textless{}account name\textgreater{}@\textless{}remote system\textgreater{}t:\textless{}directory\textgreater{} . & copy directory \tn 
% Row Count 20 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}