Qemu-kvm

qemu-kvm is one of the best virtual machine hosts for Linux.

Installation

aptitude install qemu-kvm

You have now installed qemu-kvm.

Examples

All commands are written in the terminal.

qemu(or "kvm")-img create -f qcow2 image_name.img 120G 

kvm --name 2012r2 -m 2048 -hda some.img -cdrom /home/riku/Desktop/2012r3.iso -boot d -device e1000

parameters:

--name = name of virtual machine

-m = memory for virtual machine (megabytes)

-balloon = dynamic memory usage

-hda = virtual hard drive in the form some.img

-cdrom = bootable .iso file location

-boot d = starts CD first, then hard drive (if you uncomment the -cdrom line, the hard drive starts first)

-device = your selected system components to be emulated (e1000 is Intel's gigabit NIC)

120G defines the size of the virtual hard drive. G stands for Gigabyte.