Ubuntu server 12.04 on VirtualBox

Question

I can't connect to internet. I lost eth0.

My VirtualBox network is Attached to : Bridged Adapter, Name : wlan0

Network configuration fails at VM boot

apt-get update is failing due to DNS resolution failure.

Answer 1

First I set the machine attached: NAT and started up the server the reload the network

sudo /etc/init.d/network reload

then I shut down the server and set the attached to bridge Adapter and started up the machine, and typed these commands:

sudo virsh net-destroy default
sudo virsh net-undefine default
sudo service libvirtd restart
sudo reboot

Answer 2

Changing your settings to match the below will return your eth0 connection to your VM.

Then Reboot the VM

If this doesn't work for you, drop me a comment.