I have custom rom that came with busybox installed. You might try the version by Stericsons. Really increases functionality of terminal.

Also, I'm now rather inclined to think that when GNU/Linux appears the software distributer is just following the licensing protocols and does not indicate what utilities are installed. I used to think it was both.

This following information came with the kernel source I was modifying a while back



GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language.
.
.
.
and so forth...