Display current config for all NIC's: ifconfig
Display current config for eth0: ifconfig eth0
Assign IP: ifconfig eth0 192.168.1.5
Ping: ping -c 4 afcons.com
Disable network card: ifconfig eth0 down
Enable network card: ifconfig eth0 up
View current routing table: route (or) route -n
View arp cache: arp (or) arp -n
Trace Route: traceroute afcons.com
Trace Path: tracepath afcons.com
DNS Test: host afcons.com