To install BusyBox requires superuser (root) privileges, but you also can use a busybox tools without root permissions. For it is enough in any Android terminal to type the following command:
BusyBox combines tiny versions of many common UNIX utilities into a single small executable. It provides replacements for most of the utilities you usually find in GNU fileutils, shellutils, etc. The utilities in BusyBox generally have fewer options than their full-featured GNU cousins; however, the options that are included provide the expected functionality and behave very much like their GNU counterparts. BusyBox provides a fairly complete environment for any small or embedded system.
* Device with architecture ARM, x86 or MIPS
* Android 2.3 (API 9) or later
* Superuser permissions (root)
This program comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it under license GPLv3.