Linux is a Unix-like and POSIX-compliant computer operating system assembled under the model of free and open source software development and distribution. The defining component of Linux is the Linux kernel, an operating system kernel first released on 5 October 1991 by Linus Torvalds.
Since Kali Linux 2016 came out (also known as Kali Rolling), it seems that Official VirtualBox guest addition doesn’t work well anymore. It also created lots of confusion and debate …