We thought it would be a good idea to replace the 15 yr old Netgear switch so we tried a new wireless netgear which wrecked everything. It seems to like the tp-link a little better but it will not let me get at the settings.

I am having to to type this on my tablet which I normally only use for reading books, also my eyesight is pretty poor so too much copying could be difficult.

The Ubuntu is also used by the workers in the household as a file server so my popularity is at peak levels t present.

Since you have not posted any real information about your actual problem it is a bit difficult to provide much help.

Is the Ubuntu PC using a wireless or wired connection? If wired, is it using DHCP or static IP address? If the Ubuntu PC is using a static IP address then by switching routers it would break since the default subnet can differ. Many use 192.168.0.1 or 192.168.1.1 as the router's default address. The manuals will usually note the default IP address as well as how to connect to its web configuration pages. These days most manufactures set a random default wireless password since they discovered that most people never changed it. It is usually posted on the bottom of the router.

Since the tablet is working I assume that you have updated either device with the current wireless password.

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This is becoming frustrating I am trying to send this reply and I keep told hat it is timed out,. The IP address is static and the gateway is 129.168.1.254. All I want at present is to get back to the old Netgear.

Since you have not posted what you did when you swapped new routers all I can say is swap routers, reverse whatever you originally changed and cycle power on the MODEM. I did not mention in my previous post that depending on type of broadband service many only allow one dynamic IP address based upon the the connected device's MAC.

The other desktop, three laptops and this tablet all work without change. I have tried bypassing the netgear by plugging the network cable from the Ubuntu directly into the wall socket but without success.

I m sorry I had not seen your last post when I replied just now. When I changed routers I put in the hex code but I must have made a mistake and now I get the UUID (NULL) message. I need to know what I need to put in at the command prompt to put this right.

Please bear in mind my sight problem and the difficulty of working with this tablet.

oakridge,

Using the TP-LINK TL-WDR3600 N600.

Open your browser at the default IP address:

192.168.0.1

Default username and password are both admin

Follow Quick Setup.

Quick Installation Guide:
http://www.tp-link.com/Resources/doc...7106503913.pdf

User Guide:
http://www.tp-link.com/Resources/doc...user_guide.pdf

This may be of interest:
http://blog.knofafo.de/?p=4

I assume the other devices are all using DHCP which makes things easier since network settings are automatically configured in addition to entering the wireless key if required.

So it appears the Ubuntu PC is wired? So where did you enter the hex key? Is the Ubuntu PC running a desktop?
Not sure what the UUID null message means without additional information.

What is your current router configuration?

Since the Ubuntu PC is using a static IP address you need to update its IP address and gateway information to match the desired router's LAN configuration settings. What settings have you changed on the Ubuntu PC?

I cannot do that because it will not get an 'outside line', the machine will not have anything to do with network. Ifconfig returns info for eth0,lo and wlan0 but there is no data from the BT Homehub at all.

I do apologise of course it is not static. In my attempt to get things working after trying the newer netgear I have tried reverting to the old Netgear and the TP-Link but now the machine is plugged directly into the wall socket.

The Ubuntu is running 14.04 desktop. I entered the key in the network settings window on the System Settings page and now if I try to go to network settings I get an error message about 'UUID (NULL) or the options just will not open at all. So I must need to do something from the terminal which I have forgotten. It is 7 years since I retired nd the memory fades.

Thank you for your patience it is appreciated.

oakridge.

I am in the dark here.

Can you let us have precise details of your layout/hardware when all was working correctly?

I am assuming that your Ubuntu desktop is set up as a server like this?

http://www.krizna.com/ubuntu/setup-d...-ubuntu-14-04/

OR

is it like this?

http://www.krizna.com/ubuntu/setup-f...u-14-04-samba/

Right, in one room there are two WiFi laptops and a desktop each running Windows 7 as well as a large, networked HP office laser jet. The desktop and printer are wired. In another room our daughter has her work Windows 7 wfifi laptop and in my office there is now only my Ubuntu 14.04 so it occurred to me that there is not much point in bothering with a switch so the machine is plugged directly into the wall socket which in turn goes directly to to the BT Homehub.

No I have not done anything as exotic as the server setup for so feel machines there is a just a Windoor workgroup managed by Samba. When I was working and there were two servers and nearly 50 pcs it was essential

The BT router is DHCP of course.

I think I messed up the router address quite badly because normally plugging a pc in directly should prompt automatic connection. I, too, am confused.

Does the network manager wizard work? Post the output of the command:
nmcli con show

I get the error message:
Error: 'con' command 'show' is not valid

Should there be anything between the 2 words a ':' or '-'?

The following command will show the version currently installed:
nmcli -v