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About me

Winter on Bergstrasse

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

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.

Contact info please do not send emails to this address

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, in remote locations leased boxes with AMD and Intel processors.

  • Linux ARM

since 2018-2019, I have begun to play with openSUSE on small ARM devices - Raspberry Pi, Nanopi.

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. Later on, also the linux kernel and libpam, both in very minor ways.

openSUSE Heroes

Sometime around 2016, I joined the "openSUSE Heroes", a group of sysadmins looking after the openSUSE infrastructure. At first I looked after the mailing list setup, later I took over as "mirror manager" and for the last two years, I've also been looking after much of our email setup.