On your desktop you probably have a link to keyboard shortcuts file and in this there are all, or at least most of the speakup keystrokes.
Vinux pretty much just works, so other than saving your prefs with
speakupconf save once things work as you like as far as speech rate tone and such and speakupconf load to recall these you are probably OK.
There's of course lots more that can be done. I don't think the manual is included in Vinux, but if you google it you can download or read online.
I think the url to get close is just called speakup.org, but if that doesn't work google for speakup manual.