Yeah, everything is definitely geared towards Windows users.
I used
this guide when I rooted mine. It's a guide for Ubuntu Karmic, but there isn't really anything ubuntu specific so it should work fine with any linux distro.
If you have Astro File Manager or ES File Explorer you can just put those .apk files from the Kitchen download on your sd card and then go to where you put them with one of those file managers and click on them to install them. If you don't have a file manager you can download either of those from the market for free.