How to safely shutdown Guest OS in VirtualBox using command line

Posted by Bakhtiyor on Ask Ubuntu See other posts from Ask Ubuntu or by Bakhtiyor
Published on 2011-05-13T11:58:58Z Indexed on 2013/11/08 22:16 UTC
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I have Ubuntu 10.10 and using VirtualBox 3.2. As a Guest OS I have another Ubuntu in the VirtualBox.

I am starting Guest Ubuntu automatically using following command once my Host Ubuntu boots:

VBoxHeadless -startvm Ubuntu --vrdp on

Then I can access to it with ssh or tsclient.

Now I need to shutdown automatically Guest Ubuntu once I shutdown my Host Ubuntu. Does anybody know any safe method to automatically shutdown Guest Ubuntu with a command line? I have found out two ways one can shutdown Guest OS but I am not sure whether they are safe or not. Here are they:

VBoxManage controlvm Ubuntu acpipowerbutton

or

VBoxManage controlvm Ubuntu poweroff

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