Since that time, it has been extended to become the de facto standard core user space toolset for embedded Linux devices and Linux distribution installers. Originally written by Bruce Perens in 1995 and declared complete for his intended usage in 1996, BusyBox initially aimed to put a complete bootable system on a single floppy disk that would serve both as a rescue disk and as an installer for the Debian distribution. It is released as free software under the terms of the GNU General Public License v2, after controversially deciding not to move to version 3. The authors dubbed it 'The Swiss Army knife of Embedded Linux', as the single executable replaces basic functions of more than 300 common commands. It was specifically created for embedded operating systems with very limited resources. It runs in a variety of POSIX environments such as Linux, Android, and FreeBSD, although many of the tools it provides are designed to work with interfaces provided by the Linux kernel. BusyBox is a software suite that provides several Unix utilities in a single executable file.

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