This may be completely off base, but consider adding a SSH commands cheat sheet to the app.
SSH isn't a shell in and of itself, but rather a means of accessing a TTY shell on a separate host. Most shells will have the help command, which lists all the shell's own commands. You can use man and info to get more info on an external program that supports it. While some commands are deemed standard, there are 1) too many of them to maintain and 2) already existing online man page browsers like die.net and a simple web search when you're stuck for the purpose.