firewalld go back to iptables

#!/bin/bash

# Explore -- Should see "FirewallBackend=nftables"
sudo cat /etc/firewalld/firewalld.conf | grep FirewallBackend=

# Change this to iptables
sudo sed -i 's/FirewallBackend=nftables/FirewallBackend=iptables/g' /etc/firewalld/firewalld.conf

# Confirm -- Should now see "FirewallBackend=iptables"
sudo cat /etc/firewalld/firewalld.conf | grep FirewallBackend=

# Restart firewalld and docker
sudo systemctl restart firewalld docker