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@@ -271,9 +271,9 @@ Alias=sshd.service
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<section>
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<span style="color: orange">Aufgabe:</span> Erstellt eine Unit und startet sie.<p>
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https://wiki.archlinux.org/index.php/Systemd#Writing_unit_files
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<div class="fragment">
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<code style="font-size: .5em">/etc/systemd/system/simple-webserver.service</code>
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<code style="font-size: .5em">https://wiki.archlinux.org/index.php/Systemd#Writing_unit_files<br>/etc/systemd/system/simple-webserver.service</code>
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<pre><code>[Unit]
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Description=Simple Web Server
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@@ -302,7 +302,8 @@ python3 -m http.server 8082 </code></pre>
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<pre><code>journalctl --unit=simple-webserver.service </code></pre>
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</section>
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<section>Browser öffnen: <code>http://localhost:8082/BENUTZERNAME</code></section>
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<section>Browser öffnen: <code>http://localhost:8082/BENUTZERNAME</code>
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<aside class="notes">der simple webserver ist praktisch zum dateien teilen</aside></section>
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<section><h4>Ändern der Standard-Units</h4>
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@@ -327,76 +328,126 @@ python3 -m http.server 8082 </code></pre>
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</aside>
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</section>
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<section>
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https://wiki.archlinux.org/index.php/Systemd/Timers
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<aside class="notes">üben doku lesen</aside>
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</section>
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<section>
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<span style="color: orange">Aufgabe:</span> Erstellt einen Backup Service, der per systemd Timer einmal wöchentlich läuft.
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<section style="font-size: .7em ">
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<span style="color: orange; ">Aufgabe:</span> Erstellt einen Service, der alle 5 Minuten omikron.net pingt. Die Zeitplanung soll mit systemd timer umgesetzt werden. Die Ausgabe soll nach /var/log/omikron-ping.log geschriebne werden.<p>https://wiki.archlinux.org/index.php/Systemd/Timers
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<div class="fragment">
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<code style="font-size: .5em">/etc/systemd/system/backup.timer</code>
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<code style="font-size: .5em">/etc/systemd/system/ping-omikron.timer</code>
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<pre><code>
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[Unit]
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Description=Run backup.sh weekly
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Description=Ping Omikron Timer
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[Timer]
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OnCalendar=weekly
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OnActiveSec=30s
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OnUnitActiveSec=5m
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Persistent=true
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[Install]
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WantedBy=timers.target
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WantedBy=basic.target
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</code></pre>
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</div>
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</section>
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<section>
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<code style="font-size: .5em">/etc/systemd/system/backup.service</code>
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<code style="font-size: .5em">/etc/systemd/system/ping-omikron.service</code>
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<pre><code>
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[Unit]
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Description=Backup 2000
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Description=Ping Omikron Unit
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[Service]
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Type=simple
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ExecStart=/home/USERNAME-HIER-EINSETZEN/bin/backup.sh
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ExecStart=/PFAD/ZU/ping-omikron.sh
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[Install]
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WantedBy=multi-user.target
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</code></pre>
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</section>
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<section>
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<code style="font-size: .5em">~/bin/backup.sh</code>
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<code style="font-size: .5em">/bin/ping-omikron.sh</code>
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<pre style="font-size: .4em"><code>#!/bin/bash
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tar -czf "/home/USERNAME/archiv/backup-`date +%d-%m-%Y`.tar.gz" /home/USERNAME/arbeit/
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date &>> /var/log/ping-omikron.log
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ping -c 3 oikron.net &>> /var/log/ping-omikron.log
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</code></pre>
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</section>
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<section>
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<h4>journalctl</h4>
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<pre><code>journalctl</code></pre>
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<pre><code>journalctl -xe</code></pre>
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<pre><code>journalctl --unit=backup.service </code></pre>
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<section>
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<h4>journalctl</h4>
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<pre><code>journalctl</code></pre>
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<pre><code>journalctl -xe</code></pre>
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<pre><code>journalctl --unit=backup.service </code></pre>
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<aside class="notes">man journalctl</aside>
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</section>
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<section>
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timedatectl
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<p>https://wiki.ubuntuusers.de/Systemzeit/
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<p>https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system_administrators_guide/sect-managing_services_with_systemd-targets
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<aside class="notes">man journalctl</aside>
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</section>
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<section><a href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system_administrators_guide/sect-managing_services_with_systemd-targets">Nützliche sytemd Targets</a>
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<p>https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system_administrators_guide/sect-managing_services_with_systemd-targets</section>
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<section>
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<h4>timedatectl</h4>
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Die Zeit mit systemd einstellen.
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<p>https://wiki.ubuntuusers.de/Systemzeit/
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<pre><code>sudo timedatectl set-timezone Europe/Berlin </code></pre>
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<pre><code>sudo timedatectl set-time 2019-28-02 19:01 </code></pre>
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</section>
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<section>
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<h4>Vorteile / Nachteile zu cron:</h4>
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<ul>
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<li class="fragment ">Nachteil: 2 Dateien müssen angelegt werden</li>
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<li class="fragment ">Vorteil: Besser steuerbar, Logs landen im systemd-journal</li>
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<li class="fragment ">Das ist die Zukunft</li>
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</ul>
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</section>
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<section style="font-size: .6em">
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<p>Bemerkungen:
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<p>Systemd ist rückwärtskompatibel zu Sysvinit.<br> Alte init Befehle werden von systemd verstanden, sind teilweise noch in Benutzung
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<p>init-scripte sind in <code>/etc/init.d/</code> zu finden
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<pre><code>sudo /etc/init.d/apache2 start </code></pre>
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<p>Die logs landen weiterhin zusätzlich in /var/log/
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<p>ein weiteres init-System : Upstart -> eingestellt
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<aside class="notes">
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cat /etc/init.d/apache2<br>
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cat /lib/systemd/system/apache2.service
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</aside>
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</section>
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<section data-transition="slide" data-background="#4d7e65" data-background-transition="convex">
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<h2>Part 7 - Startup / Shutdown</h2>
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<h2>Part 7 - Dateisysteme</h2>
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</section>
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<section>
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<h4>Benennung von Datenträgern</h4>
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<p>Festplatten / USB Sticks
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<ul>
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<li class="fragment ">/dev/sda - Erste Festplatte</li>
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<li class="fragment ">/dev/sdb - zweite FP</li>
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<li class="fragment ">/dev/sda1 - erste Partition auf erster FP</li>
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<li class="fragment ">/dev/sdb2 - 2. P. auf 2. FP.</li>
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</ul>
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</section>
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<section>
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<p>externe Laufwerke
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<ul>
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<li class="fragment ">/dev/scd0 od. /dev/sr0 - erstes CD / DVD Laufwerk</li>
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<li class="fragment ">/dev/scd1 od. /dev/sr1 - zweites CD / DVD Laufwerk</li>
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</ul>
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</section>
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<section><pre><code>lsblk</code></pre>
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<pre><code>NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
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sda 8:0 0 489,1G 0 disk
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├─sda1 8:1 0 63,1G 0 part /
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├─sda2 8:2 0 1K 0 part
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├─sda5 8:5 0 407,3G 0 part /home
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├─sda6 8:6 0 9,4G 0 part [SWAP]
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└─sda7 8:7 0 9,2G 0 part /tmp
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sdb 8:16 0 298,1G 0 disk
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└─sdb1 8:17 0 298,1G 0 part /home/dany
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sr0 11:0 1 1024M 0 rom
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sr1 11:1 1 1024M 0 rom
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</code></pre></section>
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<section>Reihenfolge kann sich beim Umstecken ändern.<br>For the rescue: UUID
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<pre><code>ls -Lr /dev/disk/</code></pre></section>
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</div>
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</div>
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