After we build the recovery and AOSP images, we can test them in VirtualBox. As we learnt from Chapter 9, Booting Up x86vbox using PXE/NFS, we can use PXE boot to boot the system and use NFS to access the AOSP images. To test recovery, we can add an option in the $HOME/.VirtualBox/TFTP/pxelinux.cfg/default file to boot using kernel and ramdisk/recovery.img. Even though we can boot the system to recovery now, we won't be able to update the system using the recovery in this chapter. We will find out more in the next two chapters.