Starting, shutting down, rebooting, and forcibly powering off a VM
Use the Power Controls tab for platform-level actions. A normal reboot or graceful shutdown asks the guest operating system to stop cleanly and is the safest option.
- Power on: resumes or starts a stopped VM.
- Graceful shutdown: allows services to flush data and unmount filesystems.
- Reboot: performs an orderly restart.
- Force power off: immediately removes power and can corrupt filesystems or application data.
Before a forced action, check whether SSH is merely blocked and whether the VM still responds from the OpenNebula panel. Use force power-off only when the guest cannot shut down normally, then inspect system and application logs after it returns.