[Unit] Description=Upgrade Galmon Software After=network.target nss-lookup.target StartLimitIntervalSec=0 # require that the configuration exists ConditionPathExists=/etc/default/galmon [Service] Environment=DEBIAN_FRONTEND=noninteractive Type=simple Restart=no ExecStartPre=+apt-get update ExecStart=+apt-get install -y galmon [Install] WantedBy=multi-user.target