Cloning Disks in Virtual Box

If you are looking at cloning a disk in Virtual box, don't just copy and paste the *******.vdi file because when you are creating a new Virtual machine to have that harddisk imported it would complain that the same UUID exists.  The best way to do it with the Virtual Box tools

bala@home-laptop:~$ VBoxManage clonevdi ubuntu.vdi ubuntucloned.vdi
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%..100%.