adduser vs. useradd

Project:Linux software
Component:Documentation
Category:support request
Priority:normal
Assigned:Unassigned
Status:active
Related pages:#694: User administration :-:-: #9094: app-admin/superadduser
Tags:adduser, User administration
Description

Apparently the difference depends on the linux distribution.

On gentoo, I emerged app-admin/superadduser
but I still don't have adduser:

$ which adduser
which: no adduser in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/4.9.3)