Source : http://unix.stackexchange.com/questions/39226/how-to-run-a-script-with-systemd-right-before-shutdown
/etc/systemd/system/jbshutdown.service
[Unit] Description=Exec before shutdown [Service] Type=oneshot RemainAfterExit=true ExecStart=/bin/true ExecStop=/root/bin/shutdown.sh [Install] WantedBy=multi-user.target
chmod +x /root/bin/shutdown.sh systemctl enable jbshutdown.service systemctl start jbshutdown.service
Le lien symbolique suivant sera crée : /etc/systemd/system/multi-user.target.wants/jbshutdown.service