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
ifconfig -a show you this:
This occurs when two conditions are met:
/etc/network/interfaces contains anything about the interface, even:
allow-hotplug eth0 iface eth0 inet dhcp
[main] plugins=ifupdown,keyfile [ifupdown] managed=false
Enabling Interface Management
If you want Network Manager to handle interfaces that are enabled 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.
“Auto Ethernet” and “Auto eth0″
Auto Ethernet means “Select an Ethernet interface automatically”
Auto eth0 means “autoconfigure the eth0 interface”.
Thanks for reading. Please share. This is an annoying problem that STOPs you from browsing Internet and no Internet means no solution …