TurnKey Linux should be the easiest way to test new applications. Download, unzip, and import to your VM. Now you are ready to launch.
But it doesn’t work after upgrading my Oracle VM VirtualBox, I cannot boot to VM after importing. It just stops and halt. At first, I think something wrong with my file. But after downloading it again, it is still the same.
When I important the VM, the default Guest OS Type is [Other/Unknown]. Everything runs smoothly during installation. But when you boot up, it halts after [Loading initial ramdisk…]. The only way is to [Power off the machine] from menu.
According to TurnKey Linux: Forum: LAMP doesn’t boot on VMVirtualBox 4.2.16 – loading initial ramdisk…, you need to turn off your VM completely. Then change [Type] to Linux and [Version] to Other Linux (64-bit) in [Setting]→[General]→[Basic]. Now it works again.
Amigo's Technical Notes 