Multiple node graphs on ZABBIX dashboards using Grafana.

Just recently ZABBIX 4.0 came out, so I thought we will finally get ability to display values from multiole hosts on one graph – unfortunately not. BUT! There s a way to have it directly in ZABBIX dashboards – using Grafana.

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How to clear iptables rules and save them on Ubuntu.

Just recently I’ve been testing something on an appliance with Ubuntu, and wanted to clear out all of the iptables entries, this is what worked for me: