I hope this is the right forum for this, and excuse the naive question.
I would like to provide an "guest" login to a (non-dedicated) linux server and run just one console application. The user cannot do anything more than use this application. A scenario could be:
ssh dervinATsomehost.com (no pasword)
and the just automatically execute the shell app, say
Welcome to Dervin's shell. Dervin$
when the user says exit, the whole connection would drop, not just the application.
This seems relatively simple, but I wouldn't know where to start.