qemu

Generic machine emulator and virtualizer.

Supports a large variety of CPU architectures.

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• Boot from image emulating i386 architecture:

qemu-system-i386 -hda {image_name.img}

• Boot from image emulating x64 architecture:

qemu-system-x86_64 -hda {image_name.img}

• Boot QEMU instance with a live ISO image:

qemu-system-i386 -hda {image_name.img} -cdrom {os_image.iso} -boot d

• Specify amount of RAM for instance:

qemu-system-i386 -m 256 -hda image_name.img -cdrom os-image.iso -boot d

• Boot from physical device (e.g. from USB to test bootable medium):

qemu-system-i386 -hda /dev/{storage_device}

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