Date: 2016feb25 OS: Linux Level: beginner Q. Linux: How does a packet know how to get to the internet? A. You can list the routing table with the route command:

route

Example output:

Destination Gateway Genmask Flags Metric Ref Use Iface default my-router 0.0.0.0 UG 100 0 0 enp2s0 192.168.50.0 0.0.0.0 255.255.255.0 U 100 0 0 enp2s0

Or without resoluving the IP-addesses:

route -n

Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.50.1 0.0.0.0 UG 100 0 0 enp2s0 192.168.50.0 0.0.0.0 255.255.255.0 U 100 0 0 enp2s0