The bold underlined bit is your modem. That is the number you need to tell your computer about so in a terminal type

Fairly simple, again, in the console, enter this

Where the bit marked in red is the IP address you want to use, permanently. Caution (this is a bit of networking theory) though about the choice.

Let's assume you have tow PC's on trhe same network, consider this:

They will never be able to reach/see each other - I marked the crucial bits in red. For all participating hosts (PC's, printers, modems and what have you) in a network to function together, only the LAST bit has to change. If a bigger network is called for - this scheme only allows for some 255 hosts - a different scheme is called for. These schemes have been determined by IANA and are documented. There is a scheme for each particular use...

Okay, your modem has 192.168.0.1 as address, fair enough, then you'd set the IP address like so:

...where X is any unused number you want...

However...this worries me:

This is the setup for the loopback deviice, but I dont see the setup of the network card...
There should be an entry that starts with eth0 as well...it almost looks as if the network card itself is not (yet) installed in the Linux section...

Dont worry, in fact, I enjoy doing this, and I suspect I'm not the only one...

Looking on...

THor

+1 Helping out is what sites like this, and Linux itself, is all about.

k3lt01: Thank you for the modem direction, I entered command "route add default gw 192.168.0.1" Response: ""SIOCADDRT: Operation not permitted.

You need to be root to do that, so try

Thor: The networking address makes more sense. I entered command "ifconfig eth0 192.168.0.1
(whereas the last digit was tried 3 different times as .1, .2, .3) netmask 255.255.255.0 broadcast 192.168.10.255 up" Reply was same each time:
SIOCSIFADDR: Permission denied
eth0: ERROR while getting interface flags: No such device
SIOCSIFNETMASK: Permission denied
SIOCSIFBRDADDR: Permission denied
eth0: ERROR while getting interface flags: No such device
eth0: ERROR while getting interface flags: No such device

tobiSGD: Thank you, I entered command "sudo route add default gw 192.168.0.1"
Response: "[sudo] password for kenken:" I entered my password
Response: "SIOCADDRT: No such process"
Ken

Thor 2, K3lt01 & TobiSGD: Some points about computer. I originally set up my desktop w/ a modem from the local telephone company Qwest (now CenturyLink), the modem was simple but effective. Several months ago I found a different modem on craigslist, also from Qwest but this one has several Internet ports in back to run several pc's, netflix at same time. So this is the one I currently have, this is the one I found IP Address, Subnet Mask & Default Gateway in windows. Could the changing to a different modem cause issues, I had run fine for several months before this whole thing began. Second, I am getting a weird issue w/ my desktop/linux, it began at same time the "firefox can't find the server at start.ubuntu.com" issue began. It is this, when I start up my computer and leave on for several hours with no activity, the screen goes black and the green-lit on/off button goes yellow and I cannot get the screen back on. The Processor, which has a green on/off button is lit but nothing happens. I have to hold Processor button in for several seconds till the processor shuts down, wait several seconds, then I am able to turn computer back on. Computer & screen then works again, only to go thru the process all over again. Any suggestions? Ken

Hello, is anyone still out there and available to help with my computer issue? Ken.

Sure are Ken, what have you done since your last post a week ago?

K3lt01: Per TobiSGD, he suggested the following, "sudo route add default gw 192.168.0.1", I posted my results, prior was Thor's entry. I posted my results for that also. Kinda stuck as to what to try next. Did you read the latest thread about the switching to a different modem? I'm not sure that has any bearing, it's worked fine for the windows os, actually it worked fine for about 2 months w/ linux. Ken

Yeah I did read that, sory got a bit on my mind lately so didn't really notice your question about the modem. Did Firefox in Ubuntu work at all with this current modem? If it hasn't then are you able to try the old modem? You will probably need to reset the gateway again if the IP address is different.

K3lt01: Yes, they both worked when I switched over to the new modem, windows is still running with it. I did hook the old modem back up to check it and had the same issue, one up, one down. The Gateway listed above is of the new modem. Ken.

k3lt01: Just a quick thought, would upgrading or reloading my current linux version solve anything? I realize it would take away the trouble-shooting process but...Ken

Possibly, but I doubt it. I'm just a little stumped as to what the issue may be. Have you got encryption on the modem? WEP or WPA or anything like that? In other words do you have a password to it.