“BusyBox is an open source (GPL) project providing simple implementations of nearly 400 common commands, including ls, mv, ln, mkdir, more, ps, gzip, bzip2, tar, and grep. It also contains a version of the programming language awk, the stream editor sed, the filesystem checker fsck, the rpm and dpkg package managers, and of course, a shell (sh) that provides easy access to all of these commands. In short, it contains all the essential commands required for a POSIX system to perform common system maintenance tasks as well as many user and administrative tasks.” – read more at OpenSource.com!