= QEMU =

QEMU is a lightweight cli virtual machine program

== Making a virtual disk ==

To run a vm you need a virtual hard drive. To make one,

{{{
qemu-img create -f file_format <image_name> image_size
  }}}
  
File format can be raw, qcow2, etc

size is notated with G for gigabytes, ie 5G is 5 gigabytes

== Making a virtual machine ==

We need a virtual disk and an iso file to run. To do this

{{{
qemu-system-x86_64 -cdrom iso_image -cpu host -enable-kvm -m RAM_size -smp
number_of_core -drive file=disk_image.iso,format=qcow2
  }}}
  
-cdrom is for iso_image

-cpu host is to emulate the host processor

-enable-kvm uses the kernel virtual machine

-m is for memory, ie 2048

-smp is for the number of cores, ie 4

To run off of an already installed hard drive without an iso, run

{{{
qemu-system-x86_64 -cpu host -enable-kvm -m 2048 -smp 2 -drive
file=/path/to/vdisk.qcow2,format=qcow2
  }}}
  
== Emulating different systems ==

If we want to emulate i386, replace 'qemu-system-x86_64' with
'qemu-system-i386'. This works with most other architectures, assuming you have
them installed.

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