Linux puskom-ProLiant-DL385-Gen10 5.4.0-150-generic #167~18.04.1-Ubuntu SMP Wed May 24 00:51:42 UTC 2023 x86_64

//lib/systemd/system/vboxballoonctrl-service.service

 [Unit]
SourcePath=/usr/lib/virtualbox/vboxballoonctrl-service.sh
Description=
Before=runlevel2.target runlevel3.target runlevel4.target runlevel5.target shutdown.target 
After=vboxdrv.service 
Conflicts=shutdown.target 

[Service]
Type=forking
Restart=no
TimeoutSec=5min
IgnoreSIGPIPE=no
KillMode=process
GuessMainPID=no
RemainAfterExit=yes
ExecStart=/usr/lib/virtualbox/vboxballoonctrl-service.sh start
ExecStop=/usr/lib/virtualbox/vboxballoonctrl-service.sh stop

[Install]
WantedBy=multi-user.target