Virtualization management is part of Linux system administration and is included in Linux+ V8 objectives. KVM virtual machines commonly use disk image formats such as qcow2, raw, or vmdk. Converting between these formats is a routine administrative task.
The correct tool for disk image conversion is qemu-img. This utility allows administrators to create, convert, resize, and inspect virtual disk images. For example, converting a qcow2 image to raw format can be accomplished using qemu-img convert. This capability is explicitly referenced in Linux+ V8 documentation related to virtualization tooling.
The other options are incorrect. qemu-kvm refers to the hypervisor component, not disk manipulation. qemu-ng is not a valid QEMU utility. qemu-io is used for low-level I/O testing and debugging, not image format conversion.
Therefore, the correct answer is D. qemu-img.
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