New to Ubuntu

[Nils Kassube]

bill purvis wrote:
> Thanks for all the responses to my newbie problem.
> I have another - I have just had to reboot my
> system and when it came up the network was in
> a weird state. This machine is networked via a server
> running Mandrake which also acts as firewall etc.
> trying to 'ping' my server I got the old 'network unreachable'
> error message.
> Running ifconfig eth0 gave:
>
> eth0      Link encap:Ethernet  HWaddr 00:A0:D1:BB:37:4E
>           inet6 addr: fe80::2a0:d1ff:febb:374e/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:23 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:3727 (3.6 KiB)  TX bytes:468 (468.0 b)
>           Interrupt:19 Base address:0x6000
>
> No, IP4 address. Running the System/Administration/Network
> tool showed the correct IP4 static address. I changed this
> slightly and ifconfig then showed the new IP4 address.
> Changing it back to what I had originally set it resulted
> in the network then being operational again.


Check your /etc/network/interfaces -- it should look like this:

auto eth0
iface eth0 inet static
address 192.168.1.123
netmask 255.255.255.0
gateway 192.168.1.1

Adjust the address line for the address of your machine and the gateway 
line for the address of the server.


Nils