сент. 15 16:05:43 ubuntu systemd[1]: Starting /etc/rc.local Compatibility...
сент. 15 16:05:47 ubuntu rc.local[618]: Usage: /etc/init.d/networking {start|stop|reload|restart|force-reload}
сент. 15 16:05:47 ubuntu systemd[1]: rc-local.service: control process exited, code=exited status=1
сент. 15 16:05:47 ubuntu systemd[1]: Failed to start /etc/rc.local Compatibility.
сент. 15 16:05:47 ubuntu systemd[1]: Unit rc-local.service entered failed state.
сент. 15 16:05:47 ubuntu systemd[1]: rc-local.service failed.
А правильно запускать пробовали?
/etc/init.d/networking
start
/etc/init.d/zabbix-server
start
/etc/init.d/zabbix-agent
start