Any chance to collect the list of commands just for our devices here? Wiki?
I'd like to learn as well.

sudo gainroot
apt-get help

and here more or less everything is clear. But would be useful to have some kind of short description what each option actually can do.

But just help giving me list of commands that I have no idea how to use it. There is more that is impossible to guess that even exist. Try to remind yourself what did you felt seeing xterm first time in your life