# About Busybox > BusyBox is a [software suite](https://en.wikipedia.org/wiki/Software_suite "Software suite") that provides several [Unix utilities](https://en.wikipedia.org/wiki/List_of_Unix_commands "List of Unix commands") in a single [executable file](https://en.wikipedia.org/wiki/Executable_file "Executable file"). It runs in a variety of [POSIX](https://en.wikipedia.org/wiki/POSIX "POSIX") environments such as [Linux](https://en.wikipedia.org/wiki/Linux "Linux"), [Android](https://en.wikipedia.org/wiki/Android_(operating_system) "Android (operating system)"), and [FreeBSD](https://en.wikipedia.org/wiki/FreeBSD "FreeBSD"), although many of the tools it provides are designed to work with interfaces provided by the Linux kernel. It was specifically created for embedded operating systems with very limited resources. The authors dubbed it "The [Swiss Army knife](https://en.wikipedia.org/wiki/Swiss_Army_knife "Swiss Army knife") of [Embedded Linux](https://en.wikipedia.org/wiki/Linux_on_embedded_systems "Linux on embedded systems")",[\[10\]](https://en.wikipedia.org/wiki/BusyBox#cite_note-10) as the single executable replaces basic functions of more than 300 common commands. It is released as [free software](https://en.wikipedia.org/wiki/Free_software "Free software") under the terms of the [GNU General Public License](https://en.wikipedia.org/wiki/GNU_General_Public_License "GNU General Public License"), version 2. > > \-- [Wikipedia](https://en.wikipedia.org/wiki/BusyBox)