sudo usermod -a -G vboxusers $USER

cat <<EOT > vbox_vm_start@.service
[Unit]
Description=VirtualBox VM %I
After=network.target vboxdrv.service
Before=runlevel2.target shutdown.target

[Service]
User=<put_your_username_here>
Group=vboxusers
Type=forking
Restart=no
TimeoutSec=5min
IgnoreSIGPIPE=no
KillMode=process
GuessMainPID=no
RemainAfterExit=yes

ExecStartPre=/bin/sleep 30
ExecStart=/usr/bin/VBoxManage startvm %i --type headless
ExecStop=/usr/bin/VBoxManage controlvm %i acpipowerbutton

[Install]
WantedBy=multi-user.target
EOT

sed -i "s/<put_your_username_here>/$USER/" vbox_vm_start@.service
sudo cp vbox_vm_start@.service /etc/systemd/system/vbox_vm_start@.service
rm vbox_vm_start@.service
sudo systemctl daemon-reload

vboxmanage list vms

sudo systemctl enable vbox_vm_start@<name of VM>
sudo systemctl start vbox_vm_start@<name of VM>
sudo systemctl status vbox_vm_start@<name of VM>
sudo systemctl stop vbox_vm_start@<name of VM>
sudo systemctl disable vbox_vm_start@<name of VM>
sudo systemctl daemon-reload