up vote 0 down vote favorite

Hi My problem is the following: I was at my friend, were they had mac filter on the network. I used to clone the MAC in the network manager, but I accidentally copied it in the wrong field, and somehow 'switched' the Device static MAC It did not dropped any error and I applied it. Now I can't get into the options, because it drops an error:

error editing connection: did not find a connection with UUID '(null)'

And the laptop cannot connect to the internet at wire, only at wifi.

Maybe is there a way that I can restore it in a file? I haven't found it in /etc/network, but I guess it is there somewhere.

Or is it possible, that if i reinstall the network manager with a purge it will restore everything?

I use ubuntu 14.04 with gnome3 on a thinkpad t510.

share|improve this question
    
Have a look at the content of /etc/NetworkManager/system-connections/. There should be a file for each network connection. Please identify the configuration file for your wired connection and edit your question to include its content. – David Foerster Feb 26 '15 at 13:26
    
That was exacly the file i was looking for :) Thank you (idk why i was thying to find it in the network folder when it was a Manager mistake) i will remove the question – Shad Feb 26 '15 at 13:36
    
If you struggle further, edit your question with an update and new findings. If you manage to solve the issue yourself, please write an answer and accept it. Shoot me a message and I'll vote it up, if it's any good. – David Foerster Feb 26 '15 at 13:38
up vote 3 down vote accepted

I found the config in /etc/NetworkManager/system-connections/ edited it with GEdit and restored the broken line 

[802-3-ethernet]
duplex=full
mac-address=F0:DE:F1:XX:XX:XX

[connection]
id=Wired connection 1
uuid=5872a1e2-fe69-4158-aa49-844d309f91a8
type=802-3-ethernet
timestamp=1424948640

[ipv6]
method=auto

[ipv4]
method=auto

I restored the MAC address line to my original MAC (masked in the above listing) and it's working now.

share|improve this answer
    
You shouldn't publish your MAC address, because it can be used to cause mischief. – David Foerster Feb 26 '15 at 13:51
up vote 0 down vote

My sulotion is: Search: Enter "Network connection" -> Add > Ethernet -> set Automantic(DHCP) at Ipv4 and tick "require ipv4 addressing for..." -> Save. I hope it help you!

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.