It looks as though you may be running the VBoxManage command as a different user to the one that started the virtual machines.
On my live Debian 9 machine they get started by a user called "virtualbox" and the VBoxManage command has to be run by that user. Running it as root, for example, shows no output.
-Andy.
My crystal ball is currently broken. If you want assistance you are going to have to give me all of the necessary information.
Please don't ask me to do your homework for you, I have more than enough of my own things to do.
Run "ps -aux" as root and look or grep through the output. The first field is the owner of the running process.
-Andy.
My crystal ball is currently broken. If you want assistance you are going to have to give me all of the necessary information.
Please don't ask me to do your homework for you, I have more than enough of my own things to do.