Qcow2 files are "thin-provisioned," meaning they only take up the space actually used on the host machine, rather than the entire virtual hard drive size.

If you found a .vdi (VirtualBox) or .vmdk (VMware) image but you need QCOW2 for your server or QEMU setup, you can convert it easily.

You can launch the VM via the command line or use a GUI like virt-manager .

Downloading a ready‑made QCOW2 file from an unknown website carries significant security risks. The image could contain malware, rootkits, or keyloggers that will be active the first time you boot the VM. Before using any pre‑built image, always: