qm-clone
Create a copy of virtual machine on QEMU/KVM Virtual Machine Manager.
TLDR
Copy a virtual machine
$ qm copy [vm_id] [new_vm_id]
Copy a virtual machine using a specific name
$ qm copy [vm_id] [new_vm_id] --name [name]
Copy a virtual machine using a specific descriptionn
$ qm copy [vm_id] [new_vm_id] --description [description]
Copy a virtual machine creating a full copy of all disks
$ qm copy [vm_id] [new_vm_id] --full
Copy a virtual machine using a specific format for file storage (requires --full)
$ qm copy [vm_id] [new_vm_id] --full --format [qcow2|raw|vmdk]
Copy a virtual machine then add it to a specific pool
$ qm copy [vm_id] [new_vm_id] --pool [pool_name]