My name is Per Jessen, I live in Herrliberg outside Zürich in Switzerland with my family. I own and run my own company, ENIDAN Technologies GmbH which provide a number of different services: Spamchek, Hostsuisse, Cloudsuisse and DNS24
- if you are interested in my professional life prior to Spamchek, feel free to browse my LinkedIn profile.
- if you are interested in my private life, Bjarne Wildau wrote two articles about me and my family . In Danish: artiklerne i Århus Onsdag.
Otherwise, there probably isn't much to say about me that you won't find by a bit of googling - since the early 1990s, I've been active on numerous mailing lists, generally making a nuisance of myself, but occasionally also helping people with something or other.
- email: email@example.com
openSUSE and I
It's been a long time since I - more or less by accident - picked up a copy of SuSE Linux 4.4.1 in the Hugendubel bookstore on Marienplatz in München. I think it must have been around 1996, but I'm not sure. Since then I believe I've bought versions 5.3, 6.1, 6.4, 7.0, 7.1, 7.3, 8.0, 8.1, 8.2, 9.1, and 9.3. I still have most of the CDs, the boxes and manuals from those. Starting with 10.0, I've been fairly active in the alpha- and beta-test programmes, and as a thank you for my efforts, Novell has been kind enough to send me a copy of 10.0 etc.
Today I use only openSUSE. In fact, in my company we use only Linux and open source software, perhaps with one or two exceptions (our double entry book-keeping software is a Windows product). I've had occasional flings with Gentoo, Debian, Mandrake and Ubuntu, but never for very long and I've always returned to openSUSE.
Linux and I
- Linux S/390
It's probably worth mentioning my interest in Linux S/390. I've spent the majority of my professional life writing software for IBM operating systems (MVS, TPF), so when I started working for BEA Systems in 2001, it wasn't long before I began to look at running Weblogic on the mainframe. This quickly led to a couple of minor contributions to the Hercules System/390 emulator, and somehow I also got involved in an initial effort of getting SAPDB (now MAXDB) to build and run on Linux-390.
- Linux Intel
Running Linux on Intel-compatible hardware is the basis of how I make a living. I maintain a production environment the two datacentres - locally, mostly HP Proliants, remotely leased boxes with AMD and Intel processors.
open source and I
Since the late 90s, I have contributed to a number of open source projects, some of which are: hercules, dosemu, etherboot, maxdb, spamassassin and clamav. There's probably more, but those are what I remember right now.