Ubuntu: Remove ifupdown(eth0) connection


While I was installing Ubuntu 14.04 I had some issues with graphic card drivers so I needed to install drivers from root, I created adsl connection using pppoeconf. Now when I boot up my PC I have two connections, my regular connection which I use and ifupdown(eth0) which was created using pppoeconf.

How can I delete eth0 connection so it doesn't bothers me anymore?


Open your file manager and go to /etc/network/. Once there, you have to edit the file interfaces like this:

  sudo gedit /etc/network/interfaces   


  gksu mousepad /etc/network/interfaces  

and delete all entries in there except for auto lo / iface lo inet loopback.

The following lines

   auto lo     iface lo inet loopback  

have to be the only entries present in /etc/network/interfaces.

Next you should edit a second file located in /etc/NetworkManager/NetworkManager.conf. Use this code in a terminal window:

   sudo gedit /etc/NetworkManager/NetworkManager.conf  


   gksu mousepad /etc/NetworkManager/NetworkManager.conf  

Look for this entry [ifupdown] and edit the entry to look like this:

   [ifupdown]     managed=false  

Reboot and reconfigure if necessary your network using the network applet from system tray.


Open terminal and enable super user mode.

nano /etc/NetworkManager/NetworkManager.conf  

The contents of the file will be like this:

[main]  plugins=ifupdown,keyfile,ofono  dns=dnsmasq    [ifupdown]    managed=true  

Please change the plugins section to:


Restart the network manager:

service network-manager restart  

It worked for me, I hope it will work or you too.

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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