Virtualbox can modified to boot from usb or external hdd usb with OS system in it. Here is the command We can replace /dev/sdbx according to the mounting point of the external usb. Next, create a new machine in virtualbox and put the vmdk we…

This is happened because the electricity in my city is black out. When I start my laptop, it show the bootloader option but after I pressed enter, the system can not boot into the operating system. It is said that it can not mount sda….