From the Linux Journal:
As a long-time hard-core Linux user, I thought that some of you other Linux folks might be interested in how to write and publish a Kindle ebook using only Linux tools. Before I give the the list of required software for publishing a Kindle ebook using Linux (it’s a short list), I want to point out there there isn’t any good single “Howto” guide that I’ve been able to find that describes the best way publish a Kindle ebook. There are a whole bunch of references that describe part of the process, like this one for example that describes how to create an NCX file that will enable live table of contents navigation on the Kindle. I spent a lot of time diddling with XML and OPF (Open Packaging Format) files before deciding that this was not the way to go.
Your link doesn’t work for me — try this one instead:
http://www.linuxjournal.com/content/ebook-publishing-using-linux-tools