of this book describe how to configure these (Web host)
of this book describe how to configure these services.) Checking Your Ethernet Connection After your LAN has been set up, your Ethernet cards installed, and host names and addresses added, there are several methods you can use to check that everything is up and working. For example, you can check your boot messages to make sure that your board was detected and that you can use the ping command to make sure you can connect to other computers. Did Linux find your Ethernet driver at boot-time? Type the following to check that Linux found your card and installed the Ethernet interface properly: dmesg | grep eth The dmesg command lists all the messages that were output by Linux at boot-time. The grep eth command causes only those lines that contain the word eth to be printed. The first message shown below appeared on my laptop computer with the Netgear card. The second example is from my computer with the EtherExpress Pro/100 card: eth0: NE2000 Compatible: port 0×300, irq3, hw_addr 00:80:C8:8C:8E:49 eth0: OEM i82557/i82558 10/100 Ethernet at 0xccc0, 00:90:27:4E:67:35, IRQ 17. The message in the first example shows that a card was found at IRQ3 with a port address of 0×300 and an Ethernet hardware address of 00:80:C8:8C:8E:49. In the second example, the card is at IRQ 17, the port address is 0xccc0, and the Ethernet address is 00:90:27:4E:67:35. If the eth0 interface is not found, but you know that you have a supported Ethernet card, check that your Ethernet card is properly seated in its slot. Can you reach another computer on the LAN? Try communicating with another computer on the LAN. The ping command can be used to send a packet to another computer and to ask for a packet in return. You could give ping either a host name (pine) or an IP address (10.0.0.10). For example, to ping a computer on the network called pine, type the following command: # ping pine If the computer can be reached, the output will look similar to the following: PING pine.trees (10.0.0.10): 56 data bytes 64 bytes from 10.0.0.10: icmp_seq=0 ttl=255 time=0.6 ms 64 bytes from 10.0.0.10: icmp_seq=1 ttl=255 time=0.5 ms 64 bytes from 10.0.0.10: icmp_seq=2 ttl=255 time=0.5 ms 64 bytes from 10.0.0.10: icmp_seq=3 ttl=255 time=0.5 ms 64 bytes from 10.0.0.10: icmp_seq=4 ttl=255 time=0.5 ms 64 bytes from 10.0.0.10: icmp_seq=5 ttl=255 time=0.5 ms 64 bytes from 10.0.0.10: icmp_seq=6 ttl=255 time=0.5 ms 64 bytes from 10.0.0.10: icmp_seq=7 ttl=255 time=0.6 ms 64 bytes from 10.0.0.10: icmp_seq=8 ttl=255 time=0.5 ms 64 bytes from 10.0.0.10: icmp_seq=9 ttl=255 time=0.5 ms — pine.trees ping statistics — 10 packets transmitted, 10 packets received, 0% packet loss
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