VirtualBox misc

A note for myself on my dealings with VirtualBox, refer to this link for complete command:

• Changing the virtual harddisk UUID (.vdi)
  VBoxManage internalcommands sethduuid /VirtualMachine/virtualmachine.vdi

• Resizing the virtual harddisk
  VBoxManage modifyhd virtualmachine.vdi --resize SIZE_MB

• Disable time synchronization
  VBoxManage setextradata LHBU "VBoxInternal/Devices/VMMDev/0/Config/GetHostTimeDisabled" "1"   

          You need to restart your vbox instance if it is running when you execute the command.
          Unrecommended workaround is:
          Guest Windows: go to Services, find VirtualBox Guest Additions service and stop it. You will find that time synch is no longer working, but I'm not sure whether other functionalities regarding virtual box - host integration are affected or no.
          Guest Linux:  /etc/init.d/vboxadd-timesync stop
          Disclaimer! Never tried the linux version, found it during googling.