Virtual Machine over Ubuntu 12.04

1) KVM

$sudo egrep '(vmx|svm)' --color=always /proc/cpuinfo

$sudo apt-get install ubuntu-virt-server python-vm-builder kvm-ipxe virtinst libcap2-bin

$sudo adduser `id -un` libvirtd

$sudo adduser `id -un` kvm

$sudo virsh -c qemu:///system list

$sudo apt-get install bridge-utils

$sudo /etc/init.d/networking restart

$sudo vi /etc/network/interfaces

#add this lines

auto kvmbr0
iface kvmbr0 inet dhcp
bridge_ports eth0

$ sudo /etc/init.d/networking restart

References:
[1] http://www.mrxuri.com/2013/11/22/install-kvm-on-ubuntu-server-12-04-lts-and-create-a-virtual-machine.html
[2] http://www.howtoforge.com/virtualization-with-kvm-on-ubuntu-12.04-lts