vboxmanage-controlvm
Change the state and the settings of a currently running virtual machine.
TLDR
Temporarily stop the execution of a virtual machine
$ VBoxManage controlvm [uuid|vm_name] pause
Resume the execution of a paused virtual machine
$ VBoxManage controlvm [uuid|vm_name] resume
Perform a cold reset on the virtual machine
$ VBoxManage controlvm [uuid|vm_name] reset
Poweroff a virtual machine with the same effect as pulling the power cable of a computer
$ VBoxManage controlvm [uuid|vm_name] poweroff
Shutdown the virtual machine and save its current state
$ VBoxManage controlvm [uuid|vm_name] savestate
Send an ACPI (Advanced Configuration and Power Interface) shutdown signal to the virtual machine
$ VBoxManage controlvm [uuid|vm_name] acpipowerbutton
Send command to reboot itself to the guest OS
$ VBoxManage controlvm [uuid|vm_name] reboot
Shutdown down the virtual machine without saving its state
$ VBoxManage controlvm [uuid|vm_name] shutdown
