In my spare time, I've been messing around with getting my II+ talking with a Raspberry Pi running Raspbian (a Debian Linux distrib) as a terminal. To my surprise, I have actually carved out some success in doing so, despite the II+ being more or less barely able to do so.
For example, booting up my II+ (after a short load time for Modem Mgr) results in a Linux login prompt on an 80x24 screen.. After login, I have a fully case-sensitive and usable Linux shell, from which I can transfer files using rz/sz, browse the web text-only, hop on irc or discord, send and recieve email via pine, even run local tools and apps that support window-based text interfaces.
It's taken me a couple weeks (and a LOT trial and error) to knock the dust off my Linux admin skills to make this work..
Would anybody be interested in a brief tutorial? I'm not sure what the average skill level here is, or if I might be preaching to the choir.