Now I'm going "Duh." Why didn't I check the Parallax web site.

My 2 beginners' and 3 more detailed books are indexed by bash
terminology. Somehow I escaped learning much bash jargon in my MS
Windows days ;-) I think Ubuntu could gain more converts if the
authors of Ubuntu books included index entries like "RS-232 see
tty," "serial see tty," "port see ____," and so on.