VBoxService --timesync-set-threshold 1000
https://forums.virtualbox.org/viewtopic.php?f=8&t=76625
$ cat ~/bin/sync.sh
sudo VBoxService --timesync-set-threshold 1000
$ chmod +x ~/bin/sync.sh
VBoxService --timesync-set-threshold 1000
https://forums.virtualbox.org/viewtopic.php?f=8&t=76625
$ cat ~/bin/sync.sh
sudo VBoxService --timesync-set-threshold 1000
$ chmod +x ~/bin/sync.sh