qemu-img
命令手册Tool for Quick Emulator Virtual HDD image creation and manipulation.
qemu-img create {{image_name.img}} {{gigabytes}}G
qemu-img info {{image_name.img}}
qemu-img resize {{image_name.img}} {{gigabytes}}G
qemu-img map {{image_name.img}}
qemu-img convert -O qcow2 {{path/to/file/foo.vmdk}} {{path/to/file/foo.qcow2}}