Q:

Does the vagrant destroy works on current folder or globally

I am confused with vagrant destroy command.
The output of vagrant status is
Current machine states:

default                   running (virtualbox)

But I have two vagrant VMs running in Virtual box
MacBook-Pro:server john$ vboxmanage list runningvms
"john-servers_default_1415665580149_91312" {114ad904-8629-4c4a-9344-d685c78a8228}
"test" {a6be5689-0ac3-4ac7-845d-97f2f4022cd9}

Now when I do vagrant destroy, it says do you want to destroy deafult VM
Now I am not sure which machine it will destroy. I am inside test VM but I don't want to take risk.
I tried this vagrant destroy test or vagrant destroy a6be5689-0ac3-4ac7-845d-97f2f4022cd9 but that didn't work
What is the safe way to delete VM?

A:

To destroy test VM, cd into the test folder and enter vagrant destroy - this will destroy the vagrant environment within this directory. After it is destroyed, the default provider will still be shown when you enter vagrant status, together with a not created (virtualbox) status. 
vagrant status only shows one vagrant VM running in virtualbox because this command only shows the state of the underlying guest machine within that directory. 
In order to see all vagrant environments, enter vagrant global-status --prune - this brings up the state of all the active vagrant environments no matter what directory you run this command from. You can even destroy a VM that's outside of your current directory by typing vagrant destroy ID_TAG by copying the ID tagged to the unwanted VM. 
If you are still unsure if the right VM is destroyed, input vagrant halt within the test directory and test if the right VM is being halted. This is at the very least a reversible action in case the wrong VM is selected. But the initial solution vagrant destroy within the test directory should do the trick. 

