How to do it...

Let's begin the process of creating a bootable Kali Linux USB device:

1. Starting with the Kali Linux ISO file we downloaded in the earlier recipe, installing VirtualBox, we will use Win32DiskImager (https://sourceforge.net/projects/win32diskimager/) to create a bootable USB using the ISO. Download and install Win32DiskImager.
2. Once installed, launch Win32DiskImager.

1. Win32DiskImager will use IMG files, but we will tell it to use an ISO file as the source. From the application screen, click on the File Open button, and when presented with the File Open box, change the file filter to *.* in the lower right, and navigate to the Kali Linux ISO file.
2. Select the drive letter of your USB device, and click on Write:

1. Once the image has been written to the USB drive, you will be able to boot from this device on machines that support the USB bootable media. In this configuration, you now have a bootable USB drive that will from which the Kali Linux operating system will boot, as if it were installed onto the local disk. Across reboots, you will lose any documents you may have created. If you choose it, you can create an additional partition on the USB drive that will be persistent, and keep files and documents you may wish to keep. The step-by-step instructions on how to extend this functionality can be found on the Kali Linux documentation wiki at http://docs.kali.org under 02. Kali Linux Live.