284 lines
6.4 KiB
HTML
284 lines
6.4 KiB
HTML
<!doctype html>
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<html lang="fr">
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<title>Formation Evolix : SHell</title>
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<body>
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<div class="reveal">
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<div class="slides">
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<section>
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<h1>Formation Evolix</h1>
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<h3>SHell</h3>
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</section>
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<section>
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<h2>SHell : infos versions</h2>
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<ul>
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<li>uname -a</li>
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<li>cat /etc/debian_version OU cat /etc/redhat-release</li>
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<li>dpkg -l OU rpm -qa</li>
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</ul>
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</section>
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<section>
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<h2>Shell : infos matériel</h2>
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<ul>
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<li>df -h</li>
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<li>dmidecode</li>
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<li>dmesg</li>
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<li>free</li>
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<li>top / htop / iotop</li>
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<li>iftop / netstat / iptables</li>
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<li>/proc/mdstat / vgs / drbdadm</li>
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</ul>
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</section>
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<section>
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<h2>Shell : système</h2>
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<li>ps, kill, pstree</li>
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<li>fg, bg</li>
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<li>diff, patch</li>
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<li>tar, dd</li>
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<li>gzip/gunzip, bzip2/bunzip2, xz/unxz</li>
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<li>mount/umount, man</li>
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<li>mkfs, fsck, tune2fs</li>
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</section>
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<section>
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<h2>Survivre dans un Shell</h2>
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<ul>
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<li>cd, cp, mv, rm</li>
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<li>touch, mkdir, mktemp, ln</li>
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<li>sort, wc, uniq, tr</li>
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<li>echo, cat, head, tail, read</li>
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</ul>
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</section>
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<section>
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<h2>Environnement shell</h2>
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<li>alias/unalias</li>
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<li>~/.profile, ~/.bashrc</li>
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<li>dash, zsh</li>
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</section>
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<section>
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<h2>Commandes avancées</h2>
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<li>grep, find</li>
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<li>sed, awk</li>
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<li>xargs</li>
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</section>
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<section>
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<h2>script BASH</h2>
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test.sh
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<pre><code>
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#!/bin/bash
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echo test
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</code></pre>
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<pre><code>
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$ chmod +x test.sh
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$ ./test.sh
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$ bash test.sh
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$ mv test.sh test
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$ ./test
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</code></pre>
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</section>
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<section>
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<h3>variables</h3>
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<pre><code>
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VAR=foo
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VAR=$RANDOM
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VAR=`pwd`
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$ env
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${i.%ext}
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${i#/home/}
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</code></pre>
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</section>
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<section>
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<h3>arguments</h3>
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<pre><code>
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$0 Le nom de la commande (i.e. : du script)
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$1, $2, etc. Le premier, deuxième, etc, argument passés au script
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$* La liste de tous les arguments passés au script
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$# Le nombre d'arguments passés au script
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</code></pre>
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</section>
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<section>
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<pre><code>
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test -f /etc/info.cf && . /etc/info.cf
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if, test, exit, seq, while, for, case
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</code></pre>
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</section>
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<section>
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<pre><code>
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> : change la sortie standard de la commande pour la placer dans un fichier.
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< : change l'entrée standard de la commande pour la prendre dans un fichier.
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| : branche la sortie standard de la commande de gauche sur l'entrée standard de la commande de droite.
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>> : change la sortie standard pour l'ajouter à la fin d'un fichier existant.
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|| : exécuter la commande suivante si la première a échoué.
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&& : n'exécuter la commande suivante que si la première a réussi.
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1>
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2>
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2>&1
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</code></pre>
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</section>
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<section>
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<h3>envoi d'email</h3>
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<pre><code>
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cat foo.tpl | sed -e "s/__TO__/$TO/ ; s/__TEXT__/$TEXT/" | \
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sendmail -oi -t -f return-path@example.com
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</code></pre>
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</section>
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<section>
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<h3>Opérations mathématiques</h3>
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<pre><code>
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echo $((1+1))
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echo "1+1" | bc
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echo "3/2" | bc -l
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</code></pre>
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</section>
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<section>
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<h3>TP</h3>
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<p>écrire un script qui selon les arguments renvoient un email contenant le
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nombre de fichiers/répertoires/liens dans /etc (avec une alerte par rapport à
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un seuil situé dans un fichier de configuration)</p>
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<pre><code>
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$ shellcheck script.sh
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</code></pre>
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</section>
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<section>
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<a href="http://exercism.io/languages/bash/exercises">http://exercism.io/languages/bash/exercise</a>
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</section>
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<section>
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<h2>screen</h2>
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<pre><code>
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# apt install screen
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$ screen -ls
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$ screen -r foo
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$ screen -rd foo
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$ screen -x
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</code></pre>
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<pre>
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Ctrl+a+d : sortir du screen
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Ctrl+a+a : faire un Ctrl+a
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Ctrl+a+Echap OU Ctrl+a+[ : remonter dans le buffer d'un screen
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Ctrl+a+s : freezer le screen courant
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Ctrl+a+q : defreezer le screen courant (utile quand on freeze par erreur...)
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</pre>
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</section>
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<section>
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<h2>tmux</h2>
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<pre><code>
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# apt install tmux
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$ tmux ls
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$ tmux attach -t X
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</code></pre>
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<pre>
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Ctrl+b+d : sortir du screen
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</pre>
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</section>
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