buildroot/package/coreutils/Config.in

config BR2_PACKAGE_COREUTILS
	bool "coreutils"
	default n
	help
	  All of the basic file/text/shell utilities.  These are the 
	  core utilities which are expected to exist on every system.  
	  Busybox implements many of the most common.

	  Things like:
	  - chmod, cp, dd, dir, ls, etc...
	  - sort, tr, head, tail, wc, etc...
	  - whoami, who, etc...

	  http://www.gnu.org/software/coreutils/