"groupadd" and "tree" utilities are nowh

[aromes]

I know I could add a group on Linux simply
by editing /etc/group. But where is "groupadd"?? It is not on my linux system (did
a "find" through my whole linux system and it's nowhere (not even in the usual
paths such as /usr/sbin, /sbin..where tools + binaries are located.
Anyway, "man groupadd" confirms there's no groupadd) and it is nowhere
on the linux install cd rom..and I find it nowhere to download on the internet!
Is it part of a package of tools? If yes, which one??

As for the utility "tree", I guess I can find it on the net,

[lordnothing]

try looking for this package (this is what it seems to be on my gentoo system):

usermode-utilities

that would be my guess... or something very similar..