Originally posted by SlackerLX
I do not understand how exactly playing with Firefox will help him repair the terminal
He can always use initial linux terminal using ctrl+alt+F1
I think you may have missed this line SlackerLX
This is just and example, the application name will be different and you will need to locate YOUR settings directory for that terminal application.
Though you are, of course, correct, if he boots and the system goes straight into a graphical login, he wouldn't necessarily see the initial linux login screen (I don't, but that's because I've set it like that), plus he may not understand the ins and outs of CLI, so at least the example of where satman1 may find the config files is probably a better place to start.
Or he might just say "what the hell" and re-install (tried and tested newbie or windows drone "cure all").
No offence intended !