Question

A user reports that a newly provisioned Linux server can reach other hosts on its local subnet (192.168.10.0/24) but cannot reach any external hosts or the internet. Name resolution using an external DNS server also fails. You log in and run 'ping 8.8.8.8', which returns 'connect: Network is unreachable'. Which command output would most directly confirm the root cause of this problem?

Accepted Answer

ip route show — to verify whether a default gateway route exists

Answer

ss -tulpn — to verify which services are listening on the server

Answer

cat /etc/resolv.conf — to verify the configured DNS nameservers

Answer

ethtool eth0 — to verify the link speed and duplex settings