Now, this is my first step in the Ruby world, so apologize if I am doing dumb things here.
On a Mac Ruby was preinstalled, but on Linux 13.10 I needed to do this before installing Jekyll.
$ sudo apt-get install ruby1.9.1
this installs a few things around ruby, but you also need:
$ sudo apt-get install rubygems1.9.1
this installs the gem processor, and we should all be set, then:
$ sudo gem install jekyll
tries to fetch a few things and then builds everything for jekyll.
Last step is to go to the directory of your jekyll project
$ jekyll serve
This fires up jekyll in a webserver on http://localhost:4000
Enough for today, stay tuned.