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%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
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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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\usepackage{MnSymbol}           % Symbols
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% Document Info
\author{nitcops}
\pdfinfo{
  /Title (lfcs-test-operations-deployment.pdf)
  /Creator (Cheatography)
  /Author (nitcops)
  /Subject (LFCS test Operations deployment 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}}
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\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{LFCS test Operations deployment Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{nitcops} via \textcolor{DarkBackground}{\uline{cheatography.com/217192/cs/47643/}}}
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\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}nitcops \\
  \uline{cheatography.com/nitcops} \\
  \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 31st January, 2026.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
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\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{2.68758 cm} x{2.28942 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{configure parameters kernel}}  \tn
% Row 0
\SetRowColor{LightBackground}
/proc/sys/ & le répertoire parametre noyaux \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
echo 1 \textgreater{} \seqsplit{/proc/sys/net/ipv4/ip\_forward} ou systctl -w \seqsplit{net.ipv4.ip\_forward=1/0} & non persistent \tn 
% Row Count 6 (+ 4)
% Row 2
\SetRowColor{LightBackground}
sysctl -a | grep "mot-clé" & listé tous les service \tn 
% Row Count 8 (+ 2)
% Row 3
\SetRowColor{white}
/etc/sysctl.conf & persistent \tn 
% Row Count 9 (+ 1)
% Row 4
\SetRowColor{LightBackground}
sysctl -p /etc/sysctl.d/*.conf & recharge les paramétre persistent \tn 
% Row Count 11 (+ 2)
% Row 5
\SetRowColor{white}
sysctl net.ipv4.ip\_forward & vérifié une valeur \tn 
% Row Count 13 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{vm.swappiness} \tn 
% Row Count 14 (+ 1)
% Row 7
\SetRowColor{white}
\seqsplit{/etc/security/limits.conf} & student    hard    nproc    100 \tn 
% Row Count 16 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{ulimit -u 100} \tn 
% Row Count 17 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.83689 cm} x{2.14011 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{process and service}}  \tn
% Row 0
\SetRowColor{LightBackground}
journalctl -u \textless{}service\textgreater{} -{}-no-pager & si un service démarre pas \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{top/htop/ps aux...} \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{pgrep} \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{pkill et killall?} \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{nice et renice} \tn 
% Row Count 6 (+ 1)
% Row 5
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{ss -tulpn ou nstat tulpen} \tn 
% Row Count 7 (+ 1)
% Row 6
\SetRowColor{LightBackground}
systemd-analyze blame & classement service lent \tn 
% Row Count 9 (+ 2)
% Row 7
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{pstree -p} \tn 
% Row Count 10 (+ 1)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{journalctl -xe} \tn 
% Row Count 11 (+ 1)
% Row 9
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{uptime} \tn 
% Row Count 12 (+ 1)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{systemctl unmask \textless{}service\textgreater{}} \tn 
% Row Count 13 (+ 1)
% Row 11
\SetRowColor{white}
lsof & à revoir \tn 
% Row Count 14 (+ 1)
% Row 12
\SetRowColor{LightBackground}
strace & revoir \tn 
% Row Count 15 (+ 1)
% Row 13
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{systemctl isolate multi-user.target} \tn 
% Row Count 16 (+ 1)
% Row 14
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{systemctl set-default .target} \tn 
% Row Count 17 (+ 1)
% Row 15
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{systemctl get-default} \tn 
% Row Count 18 (+ 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}{Virtual Machines (libvirt)}}  \tn
% Row 0
\SetRowColor{LightBackground}
virsh list -{}-all & liste toute les vm éteinte et allumé \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{virsh \seqsplit{start/stop/autostart/destroy} nomVM} \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
virt-install -{}-name vm\_exam -{}-memory 2048 -{}-vcpus 2 -{}-disk size=10 -{}-cdrom /tmp/rhel.iso -{}-os-variant rhel9.0 & osinfo-query os, -{}-prompt \tn 
% Row Count 9 (+ 6)
% Row 3
\SetRowColor{white}
virsh setmem \textless{}nom\_vm\textgreater{} 4G -{}-config & à chaud \tn 
% Row Count 11 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{virsh dominfo \textless{}nom\_vm\textgreater{}} \tn 
% Row Count 12 (+ 1)
% Row 5
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{virsh edit \textless{}nom\_vm\textgreater{}} \tn 
% Row Count 13 (+ 1)
% Row 6
\SetRowColor{LightBackground}
virsh net-list -{}-all & voir les réseaux virtuels \tn 
% Row Count 15 (+ 2)
% Row 7
\SetRowColor{white}
virsh net-start default & nécessaire si le réseau est inactif \tn 
% Row Count 17 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{virsh snapshot-create-as \textless{}nom\_vm\textgreater{} \textless{}nom\_snapshot\textgreater{}} \tn 
% Row Count 18 (+ 1)
% Row 9
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{virsh console \textless{}nom\_vm\textgreater{}} \tn 
% Row Count 19 (+ 1)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{virt-clone -{}-original vm1 -{}-name vm2 -{}-file \seqsplit{/var/lib/libvirt/images/vm2}.qcow2} \tn 
% Row Count 21 (+ 2)
% Row 11
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{virsh undefine \textless{}nom\_vm\textgreater{} -{}-remove-all-storage} \tn 
% Row Count 22 (+ 1)
% Row 12
\SetRowColor{LightBackground}
\seqsplit{/var/lib/libvirt/images/}.qcow2 & les images \tn 
% Row Count 24 (+ 2)
% Row 13
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{virsh pool-list -{}-all} \tn 
% Row Count 25 (+ 1)
% Row 14
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{virsh pool-start default} \tn 
% Row Count 26 (+ 1)
% Row 15
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{virsh pool-refresh default} \tn 
% Row Count 27 (+ 1)
% Row 16
\SetRowColor{LightBackground}
virt-df -d \textless{}nom\_vm\textgreater{} & voir l'occupation du disque à l'intérieur de la VM \tn 
% Row Count 30 (+ 3)
\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 Machines (libvirt) (cont)}}  \tn
% Row 17
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{virt-ls -d \textless{}nom\_vm\textgreater{} /etc} \tn 
% Row Count 1 (+ 1)
% Row 18
\SetRowColor{white}
virsh console \textless{}nom\_vm\textgreater{} & console=ttyS0 à la fin de la ligne \seqsplit{GRUB\_CMDLINE\_LINUX}. \tn 
% Row Count 4 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.23965 cm} x{2.73735 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{schedule jobs}}  \tn
% Row 0
\SetRowColor{LightBackground}
contab -e et crontab -l & MIN HOUR DOM MON DOW \textless{}commande\textgreater{} 0 5 {\emph{ }} 1 /root/backup.sh \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{/etc/cron.daily/, /etc/cron.hourly/} \tn 
% Row Count 4 (+ 1)
% Row 2
\SetRowColor{LightBackground}
/etc/cron.allow et /etc/cron.deny & /etc/at.deny \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{at 14:00} \tn 
% Row Count 7 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{atq} \tn 
% Row Count 8 (+ 1)
% Row 5
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{atrm} \tn 
% Row Count 9 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{systemctl list-timers} \tn 
% Row Count 10 (+ 1)
% Row 7
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{tail -f /var/log/cron} \tn 
% Row Count 11 (+ 1)
% Row 8
\SetRowColor{LightBackground}
/etc/crontab & "{\emph{/15 }} {\emph{ }} {\emph{" ou "0 8,12,16 }} {\emph{ }}" \tn 
% Row Count 13 (+ 2)
% Row 9
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{/etc/anacrontab} \tn 
% Row Count 14 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.64241 cm} x{3.33459 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{software packages or repositories}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{yum search \textless{}mot-clé\textgreater{}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{yum provides \textless{}chemin\_fichier\textgreater{}} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{yum list installed} \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{yum history} \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{yum history undo \textless{}ID\textgreater{}} \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{yum repolist} \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\seqsplit{/etc/yum.repos.d/} & \seqsplit{/etc/yum.repos.d/custom.repo} \tn 
% Row Count 8 (+ 2)
% Row 7
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{rpm -ivh \textless{}fichier.rpm\textgreater{}} \tn 
% Row Count 9 (+ 1)
% Row 8
\SetRowColor{LightBackground}
rpm -ql \textless{}paquet\textgreater{} & -qc et compagnie \tn 
% Row Count 11 (+ 2)
% Row 9
\SetRowColor{white}
rpm -V \textless{}paquet\textgreater{} & Vérifie si les fichiers du paquet ont été modifiés depuis l'installation (taille, date, etc.). Si rien ne s'affiche, c'est que tout est conforme. \tn 
% Row Count 17 (+ 6)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{yum clean all} \tn 
% Row Count 18 (+ 1)
% Row 11
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{dnf module list} \tn 
% Row Count 19 (+ 1)
% Row 12
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{dnf module install php:7.4} \tn 
% Row Count 20 (+ 1)
% Row 13
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{dnf module switch-to php:8.1} \tn 
% Row Count 21 (+ 1)
% Row 14
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{rpm2cpio nom\_du\_paquet.rpm | cpio -idmv} \tn 
% Row Count 22 (+ 1)
% Row 15
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{yum install createrepo} \tn 
% Row Count 23 (+ 1)
% Row 16
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{createrepo /repo\_local} \tn 
% Row Count 24 (+ 1)
% Row 17
\SetRowColor{white}
dnf deplist \textless{}paquet\textgreater{} & Vérifier les dépendances \tn 
% Row Count 26 (+ 2)
% Row 18
\SetRowColor{LightBackground}
dnf autoremove & Supprimer en nettoyant les dépendances inutiles \tn 
% Row Count 28 (+ 2)
% Row 19
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{rpm -{}-import /chemin/vers/la/clé} \tn 
% Row Count 29 (+ 1)
% Row 20
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{dnf group install "Development Tools"} \tn 
% Row Count 30 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.73735 cm} x{2.23965 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Configure create and manage containers}}  \tn
% Row 0
\SetRowColor{LightBackground}
podman run -d -v \seqsplit{/data/site:/usr/share/nginx/html:Z} nginx & :Z = conteneur RW \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{podman generate systemd -{}-name mon-web -{}-files} \tn 
% Row Count 4 (+ 1)
% Row 2
\SetRowColor{LightBackground}
podman info & Savoir si Podman est là \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{Copier le fichier dans \textasciitilde{}/.config/systemd/user/ (pour un utilisateur) ou /etc/systemd/system/ (pour root).} \tn 
% Row Count 9 (+ 3)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{systemctl enable -{}-now container-mon-web.} \tn 
% Row Count 10 (+ 1)
% Row 5
\SetRowColor{white}
podman container prune & Nettoyer les conteneurs arrêtés \tn 
% Row Count 12 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{podman stats} \tn 
% Row Count 13 (+ 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}{Recover hardware, OS, FS failure}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\seqsplit{systemd.unit=emergency.target}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
mount -o remount,rw /sysroot & chroot /sysroot, passwd root, touch /.autorelabel, exit deux fois. \tn 
% Row Count 5 (+ 4)
% Row 2
\SetRowColor{LightBackground}
fsck /dev/sda1 & (Vérifie et répare).  Attention : Ne jamais lancer fsck sur une partition montée. \tn 
% Row Count 10 (+ 5)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{xfs\_repair /dev/sdb1} \tn 
% Row Count 11 (+ 1)
% Row 4
\SetRowColor{LightBackground}
/etc/fstab & système échoue au boot car une ligne dans /etc/fstab est fausse (UUID erroné ou disque absent). Commenter la ligne fautive ou ajouter l'option nofail \tn 
% Row Count 19 (+ 8)
% Row 5
\SetRowColor{white}
grub2-install /dev/sda & Si tu vois un message "GRUB \textgreater{}" ou si le menu ne s'affiche plus.. (sur le disque, pas la partition). \tn 
% Row Count 24 (+ 5)
% Row 6
\SetRowColor{LightBackground}
grub2-mkconfig -o \seqsplit{/boot/grub2/grub.cfg} & BIOS \tn 
% Row Count 26 (+ 2)
% Row 7
\SetRowColor{white}
grub2-mkconfig -o \seqsplit{/boot/efi/EFI/redhat/grub}.cfg & UEFI \tn 
% Row Count 29 (+ 3)
% Row 8
\SetRowColor{LightBackground}
"dmesg | grep -i error" ou "journalctl -p err" & Pour voir les erreurs matérielles détectées par le noyau. \tn 
% Row Count 32 (+ 3)
\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}{Recover hardware, OS, FS failure (cont)}}  \tn
% Row 9
\SetRowColor{LightBackground}
smartctl -a /dev/sda & Pour vérifier l'état de santé (S.M.A.R.T) d'un disque dur (nécessite le paquet smartmontools). \tn 
% Row Count 5 (+ 5)
% Row 10
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{lsblk et fdisk -l} \tn 
% Row Count 6 (+ 1)
% Row 11
\SetRowColor{LightBackground}
REISUB & maintiens Alt + Impr Écran et tape lentment s puis u puis b \tn 
% Row Count 9 (+ 3)
% Row 12
\SetRowColor{white}
top et htop & Z = Zombie (processus mort mais pas nettoyé).  D = Uninterruptible sleep (souvent un processus qui attend un disque dur en train de mourir). \tn 
% Row Count 17 (+ 8)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{4.23045 cm} p{0.74655 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{SELinux}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{ps -efZ | grep httpd} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
setsebool -P httpd\_can\_sendmail on & -P !!! \tn 
% Row Count 2 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}