[jpstewart]

Exactly which parts are you having trouble with?  The "second step" in the referenced article has three footnotes which give slightly more detail at the bottom of the same page.  If those footnotes still aren't enough information (I have no idea how much IRIX or other Unix experience you have), then you might find SGI's "Personal System Administration Guide" helpful.  Chapter 4, in particular, deals with managing users and groups.

The guide can be found on any mirror of techpubs, for example the one jan-jaap runs at https://techpubs.jurassic.nl/manuals/065...index.html