Essential Mozilla Firefox/Thunderbird Extensions (Part I): ScrapBook

A useful Firefox extension for people who would like to share cached “bookmarks” between several workstations:

ScrapBook – Firefox Extension
ScrapBook @ Mozilla Update

BTW I had a similar idea for a long time. My architecture would be more flexible though, allowing any client (not only Firefox), not require any client-side configuration and provide even more useful features. I intend to implement it as soon as time permits as I really miss such a power app. In the meantime, ScrapBook serves as an interim solution.

New SSL/TLS certificates for numlock.ch

There are new SSL/TLs certificates for numlock.ch, valid through July 23, 2015:

SSL/TLS server certificates

Please delete the old certificates and import the new ones. Thank you.

For those who are interested in how to create TLS/SSL certificates for Gentoo, take a look at the Virtual Mailhosting System with Postfix Guide. In order to extend the validity of the certificates to 10 years, you need to edit a couple of files:

in /usr/sbin/mkimapdcert, replace

/usr/bin/openssl req -new -x509 -days 365 -nodes \

with

/usr/bin/openssl req -new -x509 -days 3650 -nodes \

in /etc/ssl/openssl.cnf, set

default_days = 3650 # how long to certify for

(note that strangely, the default settings in /etc/ssl/openssl.cnf override the custom settings in /etc/ssl/misc/CA.pl)

Toshiba Portégé M200 and Windows XP TabletPC Edition 2005 context menu lag solved!

By chance I seem to have finally “solved” the annoying context menu lag on my TabletPC! :)

How was it done? I just installed the “Matroska Pack Full v1.1.1” (which contains many common audio and video codecs) and enabled its context menu extension. The most obvious (but not necessarily true) explanation is that installing Matroska’s context menu extension somehow fixed the context menu bug which was presumably introduced by upgrading my TabletPC to Windows XP SP2.

Now I’m really happy that my productivity is not restrained by this bug anymore :)

IT trends and IT governance in Switzerland

An interesting study by Accenture about “IT-Trends und IT-Governance
in der Schweiz” (unfortunately in German only):

cio_survey_1104.pdf

Security awareness and IT efficiency/productivity improvements are top topics among CIOs in Switzerland for the next 12 to 24 months. The fact that most CIOs prefer standard software in the back-office and custom SW at the frontend remind a bit of the “window polishing” phenomenon known from management accounting but are in accordance with general business developments in highly developed and saturized markets (like in Switzerland). The products’s cores become more and more similar while the “wrappings” make the difference for consumers.

Free SIP client Gizmo: “Blind date” with Josef Estermann?

After having read about Gizmo in today’s issue of the Swiss newspaper Tages-Anzeiger (article not (yet?) online, unfortunately), I wanted to check it out myself. Downloaded it, installed it, did some echoing tests. Everything fine – Gizmo seems to be a pretty useful VoIP client, even in its early stage (v0.8 beta). It offers full SIP/VoIP compatibility (something Skype doesn’t offer), built-in call recording capability (dito), call in and out as a gateway to the POTS (as usual). As a first impression, Gizmo seems to be equal to or even better than Skype.

Now comes the funny side note: As most other software vendors entering a market where success heavily depends on network effects, Gizmo has a so-called tell-a-friend page. I usually ignore such pages as if, I prefer notifying friends myself (in order to not give someone else’s e-mail address to a potentially sneaky service provider) instead of sending an invitation through a web form. However, by clicking on a GUI element I just happened to be forwarded to this page.
The funny (or strange) thing about that page now is that if you take a close look at the bottom of the page, you can actually spot a picture of the former (and IMHO one of the best ever) president/mayor of the City of Zurich, Josef Estermann! The Gizmo guys were even unknowing or impudent enough to take his picture as a representative for the tell-a-friend message “Blind Date” (note that as far as I know, Mr. Josef Estermann is happily married to Mrs. Maggy Estermann):

I bet there are many ladies (and gentlemen, for equality) who’d like to have a blind date with Mr. Estermann (though it probably wouldn’t be a blind date anymore). I seriously doubt, however, that Josef Estermann agreed to have his picture taken for this advertisement. It might be just an unconscious mistake by Gizmo’s marketing department or the work of careless copy-cats. I guess it’s rather a funny coincidence/mishap than maliciousness, though ;)

Linux Device Drivers, Third Edition

A pointer by Tobias Klauser on the debian-unizh ml just reminded me of this great (and free! :) book:

LWN: Linux Device Drivers, Third Edition

Citing the authors:

This is the web site for the Third Edition of Linux Device Drivers, by Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman. For the moment, only the finished PDF files are available; we do intend to make an HTML version and the DocBook source available as well.

This book is available under the terms of the Creative Commons Attribution-ShareAlike 2.0 license. That means that you are free to download and redistribute it. The development of the book was made possible, however, by those who purchase a copy from O’Reilly or elsewhere.

LDD3 is current as of the 2.6.10 kernel. See the LWN 2.6 API changes page for information on subsequent changes.

Pair Programming: When and Why it Works

Just stumbled upon this StanfordU paper about ongoing research on the When and Why of Pair Programming (one of the practices of XP):

PairProgramming-WhenWhy.pdf (application/pdf Object)

My personal, not scientifically backed opinion on the matter is that Pair Programming is probably one of the more dispensable practices of XP. Reason: Meanwhile (since the bloom of XP in 1999), there are a couple of other, probably more efficient and certainly more flexible ways of quick and easy programmer2programmer communication like instant messaging, Skype, SIP/VoIP, video messaging, IRC/chatting, collaborative editors. These are potentially less disruptive/disturbing, enabling more concentrated functioning while ensuring an equal or even better communication (due to the higher specificity in peer selection and the availability of both synchronous and asynchronous communication). Besides, the number one communication media should be reading and writing the source code itself (eventually through an editor with on-demand collaborative editing support).

“Reverse roadmap order” patch for Trac

If you prefer a descending order (like in changelogs, blogs, etc.) for milestones in roadmaps instead of an ascending one (= default), you might want to apply my tiny patch:

Roadmap.py.patch

It applies to Roadmap.py of Trac 0.8.4 (see ‘locate Roadmap.py’).

Note that this patch both sets a reverse chronological and a reverse alphabetical order for milestones. Like this, you can name your milestones like versions (e.g. “0.2”, “0.4” .. “1.0”) and they will still appear in reverse order (even if they don’t have any associated dates).

If you want a reverse chronological only order (while keeping an ascending alphabetical order), set “name” instead of “name DESC” in the SQL statements of Roadmap.py.

Note that iCal will not be affected by the display order of the items on Trac.