qm wait

Wait until the virtual machine is stopped. More information: https://pve.proxmox.com/pve-docs/qm.1.html.

• Wait until the virtual machine is stopped:
  qm wait {{vm_id}}
• Wait until the virtual machine is stopped with a 10 second timeout:
  qm wait --timeout {{10}} {{vm_id}}
• Send a shutdown request, then wait until the virtual machine is stopped with a 10 second timeout:
  qm shutdown {{vm_id}} && qm wait --timeout {{10}} {{vm_id}}