www.jeroen.se The personal homepage of Jeroen van Nieuwenhuizen http://www.jeroen.se Jeroen van Nieuwenhuizen m4 rss@jeroen.se rss@jeroen.se 60 common sense voor politici http://www.jeroen.se/blog/2012-05-12-11-03_common_sense_voor_politici.php Jeroen van Nieuwenhuizen 2012-05-12-11-03_common_sense_voor_politici.m4 common sense voor politici
12 May 2012 11:03 - Aangezien het voor politici erg moeilijk blijkt te zijn om na te denken, hierbij een introductie in common sense.
  • Bezuinigen betekent dat je minder uitgeeft, niet dat je meer geld gaat vragen.
  • Als je lasten verhoogt voor mensen, dan gaan ze niet het zelfde blijven uitgeven.
  • Als je rode diesel duurder maakt, worden producten van eigen land en tuinbouw duurder.
  • Als je transport duurder maakt, dan worden alle artikelen duurder.
  • Als je het duurder maakt om te gaan werken, wordt het minder snel interessant om te gaan werken.
  • Tegen mensen na 40 jaar zeggen, je werkt maar 50 jaar om dan te zeggen,#44; je werkt maar 52 jaar heeft niets te maken met "het moet eerlijker".
  • Geld dat je niet hebt, kan je ook niet uitgeven.
  • Mensen gaan niet dichter bij hun werk wonen als ze eerst 10 duizenden euros voor dat privilege moeten betalen. De meeste mensen hebben dat geld ook helemaal niet.
  • Als je maatregelen neemt die huizenprijzen snel doen dalen, kunnen mensen niet verhuizen. Ze moeten dan in 1 keer te veel geld op tafel leggen.
  • Als je de BTW verhoogd, wordt het interessanter om dingen in Duitsland of Belgie te kopen.
  • Zolang je fraude in de zorg niet aanpakt, zal de fraude blijven groeien en de kosten onbeheersbaar blijven.
  • Als artikelen duurder worden, kunnen mensen minder uitgeven.
]]> How I handle my email during holidays http://www.jeroen.se/blog/2012-02-20-08-24_How_I_handle_my_email_during_holidays.php Jeroen van Nieuwenhuizen 2012-02-20-08-24_How_I_handle_my_email_during_holidays.m4 How I handle my email during holidays
20 February 2012 08:24 - Because I got some complaints about my response speed to email, I will try to give a small insight in the mysteries of how I handle my email. Especially how I handle my email during the holidays. It is a little technical, so if you do not know anything about Unix or mail, it is probably better to take a look at the pictures of my cats.
Anyway, the mail server which is the final destination for the jeroen.se email runs postfix. Which of course is configured using the main.cf file.
In my main.cf file there are 2 lines interesting for understanding how I handle my email during the holidays:
smtpd_recipient_restrictions=
    check_recipient_access hash:/usr/local/etc/postfix/holding,
Which checks all the recipients of incoming email against the /usr/local/etc/postfix/holding file. Normally this file is empty, but during my holidays it contains:
jeroen.se HOLD
Which puts all incoming mail for the jeroen.se domain into the hold queue, instead of delivering it.
When coming back from a holiday, I remove said line, run postmap on /usr/local/etc/postfix/holding and run postsuper -r ALL hold to reprocess all mail and mail will start coming into my mailbox again.
]]> the year 2011 in numbers http://www.jeroen.se/blog/2012-01-01-01-01_the_year_2011_in_numbers.php Jeroen van Nieuwenhuizen 2012-01-01-01-01_the_year_2011_in_numbers.m4 the year 2011 in numbers
01 January 2012 01:01 - As always at the beginning of the new year I look back at the previous year in numbers. This year 2011.
Car
In 2011 I drove over 41,739 kilometers by car. An increase of 8.49% compared to 2010. Based on the average diesel oil usage of my car this amounts to over 2,343 liters of diesel oil used.
The highest speed reached with my car was around 170 km/h a decrease of 13.26% compared to 2010.
I got a total of 2 speeding tickets, for a total amount of 108 euro (a 107% increase compared to 2010).
Speeding saved me around 71 hours, which makes the cost of speeding around 1.52 euro per hour saved (Which still makes it economically feasible).
0 persons managed to damage my car, while it was parked. Which is 1 less than in 2010.
Cycling
I cycled more than 1,089 kilometers an increase of 478.72% compared to 2010.
The highest speed reached by bike was 48.90 km/h (17.63% increase compared to 2010). The highest average speed was 28.80 km/h (14.65% increase compared to 2010) over a 28.80 kilometer track.
The longest track cycled was 62.46 kilometer. An increase of 97.03% compared to 2010.
Communication
I was on my cellphone for more then 58 hours a decrease of 6.45% compared to 2010.
I typed more than 385,672 characters on IRC and twitter a decrease of 66.71% compared to 2010.
Travel
I did not travel by train a drop of 100.00% compared to 2010.
Overall I traveled 1,171 kilometers less in 2011 than in 2010.
Health
My average heartbeat in rest was 53.43 beats per minute. Which is an 10.22% decrease compared to 2010.
My average weight in 2011 was 54.99KG. Which is a gain of 0.81% compared to 2010.
My estimated Vmax in 2011 was on average 36.72. Which is an increase of 0.44% compared to 2010.
Media
After my successful movie career of 2009 and 2010, 2011 was the year to make the move to the magazines with me starring in 2 magazines.
Other
I went shopping 52 times a decrease of 15.07% compared to 2010.
I completed 30 private projects. 18 less than in 2010
I wrote 1 blogpost in 2011, 4 less than in 2010.
I still got 2 cats. Which is the same as in 2010.
I helped organizing 1 conference. 1 more than in 2010.
I threw away 52 garbage bags.
I made 609 photos.
I completed 6,820 todo items.
]]> the year 2010 in numbers http://www.jeroen.se/blog/2011-01-01-18-27_the_year_2010_in_numbers.php Jeroen van Nieuwenhuizen 2011-01-01-18-27_the_year_2010_in_numbers.m4 the year 2010 in numbers
01 January 2011 18:27 - As always at the beginning of the new year I look back at the previous year in numbers. This year 2010.
Car
In 2010 I drove over 38,577 kilometers by car. An increase of 45.7% compared to 2009. Based on the average diesel oil usage of my car this amounts to over 2,044 liters of diesel oil used.
The highest speed reached with my car was around 196 km/h (on the A31 in Germany).
I got a total of 1 speeding tickets, for a total amount of 52 euro (a 24% decrease compared to 2009). (Note: I will object because I did nothing illegal at that moment. So this is 0 euro if the dutch police had followed the law.)
Speeding saved me around 77 hours, which makes the cost of speeding around 0.67 euro per hour saved (Which makes it economically feasible).
1 person managed to damage my car, while it was parked. Which is the same as in 2009. Could you be so kind to make an appointment this year?
Cycling
I cycled more than 194 kilometers an increase of 1.04% compared to 2009.
The highest speed reached by bike was 41.57 km/h (19% decrease compared to 2009). The highest average speed was 25.12 km/h (0.83% decrease compared to 2009) over a 15.23 kilometer track.
The longest track cycled was 31.7 kilometer.
Communication
I was on my cellphone for more then 62 hours an increase of 85% compared to 2009.
I typed more than 1,157,672 characters on IRC and twitter a decrease of 39.6% compared to 2009.
Travel
I traveled over 5,340 kilometers by train a drop of 91.85% compared to 2009.
I visited 1 foreign country (Germany of course) a drop of 67% compared to 2009.
Overall I traveled 48,014 kilometers less in 2010 than in 2009. Which is the same as traveling 1.20 times around the earth.
Health
My average heartbeat in rest was 59.51 beats per minute. Which is an 5.86% decrease compared to 2009. This of course means that my heart beat more than 31,278,452 times in 2010.
My average weight in 2010 was 54.55KG. Which is a drop of 1.89% compared to 2009. It is also a known issue which has been addressed.
My estimated Vmax in 2010 was on average 36.57. Which is an increase of 0.11% compared to 2009.
Other
I did 676 commits to my private subversion repository a decrease of 4.51% compared to 2009.
I went shopping 73 times a decrease of 3.94% compared to 2009.
I completed 48 private projects.
I wrote 5 blogposts in 2010, 11 less than in 2009.
I moved 1 time.
I got 2 cats. 2 more than in in 2009.
2010 was the first year I drove more kilometers in The Netherlands than in Germany. And yes , it is true. Dutch people can not drive safely.
I got 1,522 replies on twitter.
The number of plants in my home increased to 25, which in theory provided more oxygen than an average person uses in 1 year.
]]> perl script to make adding reverse dns entries for ipv6 easier http://www.jeroen.se/blog/2010-11-17-17-00_perl_script_to_make_adding_reverse_dns_entries_for_ipv6_easier.php Jeroen van Nieuwenhuizen 2010-11-17-17-00_perl_script_to_make_adding_reverse_dns_entries_for_ipv6_easier.m4 perl script to make adding reverse dns entries for ipv6 easier
17 November 2010 17:00 - I am doing a lot more then before with IPv6 lately. And one of the things I ran into was adding reverse IPv6 entries to bind. i.e. 2001:980:5e60:1:f2b5:796f:fe12:9389 should have a reverse dns entry in the 0.6.e.5.0.8.9.0.1.0.0.2.ip6.arpa. zone. To be more precise:
9.8.3.9.2.1.e.f.f.6.9.7.5.b.2.f.1.0.0.0 PTR test.ipv6.jeroen.se.
I made a simple perl script to reverse the IPv6 IP address for me: ipv6reverse.pl
Usage:
ipv6reverse.pl 2001:980:5e60:1:f2b5:796f:fe12:9389
Output:
9.8.3.9.2.1.e.f.f.6.9.7.5.b.2.f.1.0.0.0.0.6.e.5.0.8.9.0.1.0.0.2
]]> fetching voicememos from my nokia 6600i http://www.jeroen.se/blog/2010-06-15-20-04_fetching_voicememos_from_my_nokia_6600i.php Jeroen van Nieuwenhuizen 2010-06-15-20-04_fetching_voicememos_from_my_nokia_6600i.m4 fetching voicememos from my nokia 6600i
15 June 2010 20:04 - Finally some time to finish this blog post. I already wanted to write it in June. It is about how I integrated voice memos in my GTD workflow.
When I do not have access to pen, paper or a computer I capture most ideas and todo items in the voice memo recorder of my nokia 6600i. To make sure these voice memos are processed I use some scripting on my Linux server at home and a bluetooth dongle to automatically fetch these memos from my phone to the inbox folder on my computer.
First I had to allow my Linux server (Debian Sarge) to connect to my Nokia:
  • Install the bluez-utils.
  • Scan for devices:
jnieuwen@sigrun:~$ hcitool scan
Scanning ...
XX:XX:XX:XX:XX:XX jnieuwen 6600i
  • Note the bluetooth address. XX:XX:XX:XX:XX:XX in this case.
  • Connect to the device. In my case I first needed to compile the passkey-agent
cd /usr/share/doc/bluez-utils/examples/
make
./passkey-agent --default "1234"
  • Connect to the device
obexftp -b XX:XX:XX:XX:XX:XX -l
  • Type in the passkey on the Nokia (1234). This has to be done only once fortunately.
Then I daily run to following script from crontab on my linux server.
#! /bin/bash

PATH=/home/jnieuwen/bin:/usr/local/bin:/usr/bin:/bin:/usr/games
export PATH

cd $HOME/inbox || exit 1

DATUM=$(date +"%s")

# TODO Get all the file names
obexftp -b XX:XX:XX:XX:XX:XX -l "Opnamen" | grep "<file name=" | sed -e 's/.*name="//' -e 's/".*//' | while read FILENAME
do
    echo ${FILENAME}
    obexftp -b XX:XX:XX:XX:XX:XX -g "Opnamen/$FILENAME"
    obexftp -b XX:XX:XX:XX:XX:XX -k "Opnamen/$FILENAME"
    mv $FILENAME ${FILENAME/.amr/.${DATUM}.amr}
done

exit 0

]]> making my crontab more readable http://www.jeroen.se/blog/2010-04-20-16-02_making_my_crontab_more_readable.php Jeroen van Nieuwenhuizen 2010-04-20-16-02_making_my_crontab_more_readable.m4 making my crontab more readable
20 April 2010 16:02 - Today I made a small and simple script to make my crontabs more readable. The usage is quite simple. Run te script and redirect the output to a file. Review this file. Then when the file is ok, load it with crontab <file>
The script:
#! /usr/bin/env bash

crontab -l | while read min hour day month wday regel
do
    if [ x${min:0:1} = "x#" ]
    then
        echo "${min}" "${hour}" "${day}" "${month}" "${wday}" "${regel}"
    else
        if [ x${min:0:1} = "x" ]
        then
            echo
        else
            printf "%-7s %-7s %-7s %-7s %-7s %s" "${min}" \
                "${hour}" "${day}" "${month}" "${wday}" "${regel}"
            echo
        fi
    fi
done | sed 's/[ ]*$//'
]]> Moved , http://www.jeroen.se/blog/2010-04-13-20-16_moved_prince2_and_novell.php Jeroen van Nieuwenhuizen 2010-04-13-20-16_moved_prince2_and_novell.m4 Moved , Prince 2 and Novell
13 April 2010 20:16 - Finally I have some time again to write a blogpost. February and march were busy months in which I moved from Enschede to Delft. Main advantage of this is of course that I live closer to my work, which on average safes me around 12 hours a week of travel time. Another advantage is of course that the house is larger (around 30 m^2) and do not have to park my car 10 minutes away.
But that was not all that happened in the last 2 months. I also passed the PRINCE 2 Foundation exam on the 19th of february.
Beside the PRINCE 2 Foundation exam I also received some Novell certification. Due to my LPIC certifications I became a Novell Certified Linux Administrator and a Novell Data Center Technical Specialist.
]]> the year 2009 in numbers http://www.jeroen.se/blog/2010-01-01-09-44_the_year_2009_in_numbers.php Jeroen van Nieuwenhuizen 2010-01-01-09-44_the_year_2009_in_numbers.m4 the year 2009 in numbers
01 January 2010 09:44 - As always at the beginning of the new year I look back at the previous year in numbers. This time 2009.
Car
In 2009 a drove over 26,427 kilometers by car. A drop of 2.12% compared to 2008. Based on the average diesel oil usage of my car this amounts to over 1,638 liters of diesel oil used.
The highest GPS speed reached with my cars was 196 km/h.
I got a total of 1 speeding tickets (66% decrease compared to 2008), for a total amount of 68 euro (a 60% decrease compared to 2008).
Speeding saved me around 25 hours, which makes the cost of speeding around 2.72 euro per hour saved (Which makes it economically feasible).
1 person managed to damage my car, while it was parked. A decrease of 50% compared to 2008.
Running and cycling
I ran more than 14 kilometers an increase of 350% compared to 2008.
I cycled more than 192 kilometers a decrease of 82.71% compared to 2008. I had 1 flat tire while cycling.
The highest speed reached by bike was 51.47 km/h (23% decrease compared to 2008). The highest average speed was 25.33 km/h (10.24% decrease compared to 2008) over a 20.37 kilometer track.
The longest track cycled was 52.2 kilometer.
Communication
I was on my cellphone for more then 33.5 hours a decrease of 29% compared to 2008.
I typed more than 1,917,907 characters on IRC and twitter an increase of 103% compared to 2008.
Travel
I traveled over 600 kilometers by plane a drop of 40% compared to 2008.
I traveled over 65,504 kilometers by train a drop of 1.60% compared to 2008.
I visited 3 foreign countries (Germany, Belgium and the United Kingdom) an increase of 50% compared to 2008.
Health
I slept approximately 2,752 hours. An increase of 2.32% compared to 2008.
My average heartbeat in rest was 63.22 beats per minute. Which is an 5.72% increase compared to 2008. This of course means that my heart beat more than 33,228,432 times in 2009.
My average weight in 2009 was 55.60 KG. Which is a drop of 0.215% compared to 2008.
My estimated Vmax in 2009 was on average 36.53. Which is a decrease of 0.84% compared to 2008.
My ability to lift weights increased by 17% compared to 2008 (times * amount).
Other
I did 708 commits to my private subversion repository a decrease of 26.76% compared to 2008.
I went shopping more than 76 times an increase of 1.33% compared to 2008.
I completed 68 private projects an increase of 106% compared to 2008.
I logged in to remote hosts using ssh more than 7,308 times. A decrease of 44.5% compared to 2008.
I wrote 16 blogposts in 2009, 12 less than in 2008.
I read 24 books. Which amounts to over 10,000 pages.
The longest time of having no connection to the internet was 72 hours.
I watched 30 movies in 2009.
]]> how to follow cars based on price http://www.jeroen.se/blog/2009-12-08-19-12_how_to_follow_cars_based_on_price.php Jeroen van Nieuwenhuizen 2009-12-08-19-12_how_to_follow_cars_based_on_price.m4 how to follow cars based on price
08 December 2009 19:12 - Lately there has been some discussion in the Netherlands about the so called 'kilometerheffing'. 'Kilometerheffing' means in effect that you get a GPS enabled device in your car. This device tracks where you are driving and based on that info you will be billed. I.e. you will have to pay more for driving on busy roads. The average price will be around 3 eurocent per kilometer.
Of course this is an enormous invasion of privacy. Despite the claim that the GPS data will stay in the car and only will be used in criminal cases. And despite the fact that the only information the government, represented by a billing office, will get is how much kilometers you have driven for a given price. In this blog post I will show with a simple example that the price per kilometer can be used to track your movements.
People familiar with the road layout in the Netherlands will know that coming from Leiden I have a few options to get to the A1.
  1. A44 - A4 - A10 - A1.
  2. A44 - A4 - A9 - A1.
  3. A4 - A10 - A1.
  4. A4 - A9 - A1.
The difference between options 1 and 3 depending on my decision to Leiden on the east or the west side.
Lets now assume the following pricing scheme:
A44 1 eurocent per kilometer.
A1 2 eurocent per kilometer.
A4 4 eurocent per kilometer.
A9 3 eurocent per kilometer.
A10 5 eurocent per kilometer.
Lets also assume I get the following bill:
A kilometers of 1 eurocent
B kilometers of 4 eurocent
C kilometers of 3 eurocent
D kilometers of 2 eurocent
Is is fairly trivial to conclude I must have driven on the A44, A4, A9 and A1. So I probably have driven route 2.
Of course this tracking by using prices can be improved significantly. The major excuse being to regulate traffic. It is easy to argue that the traffic is more dense on Monday morning so the tariff on the A10 should be 5.005 eurocent per kilometer on Monday mornings. 5.004 eurocent on Tuesday, 5.003 euro cent on Wednesday etc. Then having a 5.004 kilometer price on your bill would put you on the A10 on Tuesdays.
To further facilitate this way of tracking the innocent I would like to propose the following scheme for the pricing:
B.WWWDDHHMMKKK eurocent per kilometer. With
B - Base tariff.
WWW - Number indicating the road.
DD - The day of the month.
HH - The current hour in 24 hour format.
MM - The current minute of the day.
KKK - The position on the road in kilometers from the start of the road.
i.e. Driving on the 1st of December 2009 at 19:54 CET on the A35 between kilometer 50 till 51 would then cost you 2.035011954050 euro cent per kilometer. This of course also allows for determining in which direction is travelled. Note that month and year is not needed, because of the monthly invoicing. Or just maybe we should put the GPS coordinates in the price.
But the moral of the story is, datamining on your 'kilometerheffing' bill can tell a lot about your movements by car.
]]> Sat May 12 11:16:44 CEST 2012