How to fix “Device not managed” error
As of Debian 6.0 “Squeeze”, (or in Kali Linux which is based on Debian) Network Manager does not manage any interface defined in /etc/network/interfaces by default.
Unmanaged devices means Network Manager doesn’t handle those network devices.
So this is what you see in GUI
An ifconfig -a show you this:
This occurs when two conditions are met:
The file
And /etc/NetworkManager/NetworkManager.conf contains:
Screenshot below:
Enabling Interface Management
If you want Network Manager to handle interfaces that are enabled in /etc/network/interfaces:
Set "managed=true" in /etc/NetworkManager/NetworkManager.conf. So this file looks like:
Restart Network Manager
Issue the following command to restart network-manager.
Now Network Manager should come up with a connected interface. For wired, eth0 with DHCP will show you something like the following image:
Just to wrap it up, lets do another ifconifg -a from command line
That looks good. Now you should be able to connect to network and browse Internet.
Some explanations
“Auto Ethernet” and “Auto eth0″
Auto Ethernet means “Select an Ethernet interface automatically”
Auto eth0 means “autoconfigure the eth0 interface”.
As of Debian 6.0 “Squeeze”, (or in Kali Linux which is based on Debian) Network Manager does not manage any interface defined in /etc/network/interfaces by default.
Unmanaged devices means Network Manager doesn’t handle those network devices.
So this is what you see in GUI
How to fix Wired Network interface “Device not managed” error in Debian or Kali Linux? |
An ifconfig -a show you this:
This occurs when two conditions are met:
The file
/etc/network/interfaces
contains anything about the interface, even:allow-hotplug eth0
iface eth0 inet dhcp
And /etc/NetworkManager/NetworkManager.conf contains:
[main]
plugins=ifupdown,keyfile
[ifupdown]
managed=false
Screenshot below:
Enabling Interface Management
If you want Network Manager to handle interfaces that are enabled in /etc/network/interfaces:
Set "managed=true" in /etc/NetworkManager/NetworkManager.conf. So this file looks like:
[main]
plugins=ifupdown,keyfile
[ifupdown]
managed=true
Restart Network Manager
Issue the following command to restart network-manager.
service network-manager restart
Now Network Manager should come up with a connected interface. For wired, eth0 with DHCP will show you something like the following image:
Just to wrap it up, lets do another ifconifg -a from command line
That looks good. Now you should be able to connect to network and browse Internet.
Some explanations
“Auto Ethernet” and “Auto eth0″
Auto Ethernet means “Select an Ethernet interface automatically”
Auto eth0 means “autoconfigure the eth0 interface”.
How to fix Wired Network interface “Device not managed” error in Debian or Kali Linux?
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