Javier Fernandez-Sanguino's avatar

Hi, I'm Javier Fernandez-Sanguino Peña (a.k.a jfs [1]), a free software developer and contributor to the Debian GNU/Linux project. If you came here looking for a journaled file system you should be looking elsewhere.

Debian work

My work at Debian consists of (co)maintaining a number of packages and services, some of which you might be using unknowingly. There's no sense in putting up a list here where you can check out the always-current developer's packages overview and the list of my contributions to the Debian project. Most of the packages I currently maintain are oriented towards IT security and network tools, as that is my field of expertise, but I also maintain some end-user and base system applications. I also pester other DDs with bugs ( here and here ) while at the same time having my share.

Spanish translation

I'm also the coordinator of the Debian Spanish translation team. I started working contributing translations to Debian in 1998, in which I started by coordinating the translation of the Debian website to Spanish and also translated a document written by Will Lowe called The New-Maintainer's Debian Packaging Howto which was a primitive version of the New Maintainer Guide document. I started coordinating Debian's Spanish translation (not just web pages, but programs and other documents too) in the year 2000 (with this message). If you want to contribute to the translation to Spanish, please read this first and then subscribe to our mailing list.


Documentation is something I like to write too. Consequently, I'm also active in the Debian Documentation Project and dedicate some of my time to updating documentation within Debian. I'm proud to be maintainer, since 2001, of the Securing Debian Manual which seems to be somewhat popular, but I have also contributed my share to the Debian FAQ, the Release Notes (throughout different releases) and the Debian Project History.

Writting documentation also includes working at the Debian website, I've been a member of the Debian website team since year 2000, and developed the mechanism used to detect out of date translations (although the current system has been much more improved and nothing remains of the -ugly- code I originally wrote save for some comments). I now contribute from time to time with the team, like I did when I wrote the scripts that generate the security crossreferences page.

With the goal of documentation in mind I also maintain the Debian online Manpages service. This service provides manpages of programs available in Debian to end-users and is a good reference service. I did not write the code myself, I adapted existing interfaces and source code (more info).


I was involved as a member of the Debian Security Audit team (started in may 2004). And that time I was focused on weeding out temporary file handling bugs so you might have seen my name attached to security advisories for Debian and other Linux distributions. The full list of advisories related to our work can be found here.

Content of this repository

I also provide some packages and other asorted material through people.debian.org, although I only update from time to time.

This repository currently holds:

Other FLOSS contributions

I'm a contributor to some other free software projects, and lead developer of the Tiger security tool.

If you are still curious about my work you might want to check out my OpenHUB profile (formerly Ohlog) or my advogato profile. The former is automatically up to date, since it picks up commits I do to projects I work in, the latter is not too up-to-date.

How to thank me

If you want to keep me happy you can use my Amazon wishlists to help me understand computer security better, have me disconnect from online life through fantasy, help me improve my programming skills, or surprise me with something different.

Other jfs on the web

Obviously, there are other people which share my same nickname online. I'm aware of at least one, also Spanish, and who also works in IT security. But, no, I'm not the guy who was arrested in 1997, went to trial, and was absolved (full transcript) of hacking into a university's computer. I'm also not the Spanish guy who won PC Week's 1999 hacking contest (you can find the writeup in Rik Farrow's musings).