HOWTO : Fix Device Not Managed on Kali Linux 1.1.0a

When the Kali cannot ping the internet on every boot up in VirtualBox, or the network interfaces is "Device Not Managed", or you cannot connect to PPTP VPN or similar, you can :

cp /etc/network/interfaces /etc/network/interfaces-original

nano /etc/network/interfaces

Make it looks like the following, yes, only loopback interface :

# This file decribes the network interfaces available on you system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interace
auto lo
iface lo inet loopback

Then reboot the Kali or run the following command :

service networking restart

That's all! See you.