gup(1) on Linux
The text 5d36fa38978f, as Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it.
A Group Update Program that accepts commands by mail to edit a newsgroup subscription file for subsequent use by news systems such as INN and C-News.
Flags it lists
-
-P -
-h -
-v