This screen prompts you with:
Would you like a shell in your new filesystem before I reboot on it? 1) yes 2) no >
If you have nothing to do in the shell before rebooting, select "2" or "n" now. If you select "1" or "y" it is assumed that you know what you are doing. You may wish to 'chroot /newroot' and see what can be done with it (though you may have to mount some filesystems first).