VBoxManage

VBoxManage

VBoxManage controlvm
# list vms 
VBoxManage list vms
# show detail
vboxmanage showvminfo "my-ubuntu" 

# power off
VBoxManage controlvm my-ubuntu poweroff

# start headless
VBoxManage startvm my-ubuntu --type headless

# set auto restart 
VBoxManage modifyvm <uuid|vmname> --autostart-enabled on

To make vboxautostart-service.service work, you need to disable SELinux

sudo setenforce 0
vim /etc/selinux/config
# change to SELINUX=permissive