Get-default-interface.sh
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#!/bin/bash default_route_gateway=$(/sbin/ip route list match 0.0.0.0/0 | awk '{print $3 }') echo "Default route gateway: ${default_route_gateway}" interface_that_services_the_default_route_gateway=$(/sbin/ip route get to ${default_route_gateway} | awk '{print $3}') echo "The interface that services the default route gateway: ${interface_that_services_the_default_route_gateway}" default_interface_ip=$(/sbin/ip route get to ${default_route_gateway} | awk '{print $5}') echo "Default interface IP: ${default_interface_ip}"