===== VirtualBox Operation =====

List running VM:

  VBoxManage list runningvms

Start the VM (for example VM:WinServer, type:headless):

  VBoxManage startvm "WinServer" --type headless

Power Off the VM:

  VBoxManage controlvm "WinServer" poweroff

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Enable VRDE (VirtualBox Remote Display Extension):

  VBoxManage modifyvm "WinServer" --vrde on

Check the RDP Port:

  VBoxManage showvminfo "WinServer" | grep VRDE

Check if the Port is Listening:

  ss -tulpn | grep VBox

Then use host IP to connect via RDP, this example is 192.168.1.10, while the VM on 192.168.1.11.

Connect to VRDE from Linux: 

  xfreerdp /v:192.168.1.10:3389

Connect to VRDE from Windows:

  mstsc → 192.168.1.10:3389