[RoR] Just starting, already stuck

So I feel like I’m getting pretty good at PHP (I write random apps for work constantly, though it has nothing to do with my job) and I want to learn something that perhaps is a little more modern, or at the very least expand my horizons. I found a one-click installer to RoR (which was always my hold back, I’m an idiot when it comes to servers) and I’m trying to follow this tutorial.

That’s all find and dandy, I started a new project which worked out fine, but the first command after that is puking errors all over me. The line I’m supposed to enter is this:

script/generate scaffold Book title:string description:text

The errors I get are as follows

(irb):1: warning: parenthesize arguments for future version
(irb):1: warning: parenthesize arguments for future version
SyntaxError: compile error
(irb):1: syntax error, unexpected tIDENTIFIER, expecting kDO or '{' or '(' 
script/generate scaffold Book title:string description:text
                        ^
(irb):1: syntax error, unexpected tIDENTIFIER, expecting $end 
script/generate scaffold Book title:string description:text
                                                      ^

I assume it’s all because I’m not writing the code correctly with the way I’m defining arguments but this is literally the first thing I’ve done in RoR so excuse my obvious and complete ignorance. I’m following a fairly recent tutorial so it concerns me that it doesn’t work.

Any help?