Ny post.

[homepage.git] / blog / index.rss

<?xml version="1.0" encoding="utf-8"?>
<rss version='2.0' xmlns:lj='http://www.livejournal.org/rss/lj/1.0/' xmlns:atom="http://www.w3.org/2005/Atom">
        <channel>
                <title>Petter Reinholdtsen</title>
                <description></description>
                <link>http://people.skolelinux.org/pere/blog/</link>
                <atom:link href="http://people.skolelinux.org/pere/blog/index.rss" rel="self" type="application/rss+xml" />
        
        <item>
                <title>Norwegian citizens now required by law to give their fingerprint to the police</title>
                <link>http://people.skolelinux.org/pere/blog/Norwegian_citizens_now_required_by_law_to_give_their_fingerprint_to_the_police.html</link>
                <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Norwegian_citizens_now_required_by_law_to_give_their_fingerprint_to_the_police.html</guid>
                <pubDate>Sun, 10 May 2015 16:00:00 +0200</pubDate>
                <description>&lt;p&gt;5 days ago, the Norwegian Parliament decided, unanimously, that all
citizens of Norway, no matter if they are suspected of something
criminal or not, are
&lt;a href=&quot;https://www.holderdeord.no/votes/1430838871e&quot;&gt;required to
give fingerprints to the police&lt;/a&gt; (vote details from Holder de
ord).  The law make it sound like it will be optional, but in a few
years there will be no option any more.  The ID will be required to
vote, to get a bank account, a bank card, to change address on the
post office, to receive an electronic ID or to get a drivers license
and many other tasks required to function in Norway.  The banks plan
to stop providing their own ID on the bank cards when this new
national ID is introduced, and the national road authorities plan to
change the drivers license to no longer be usable as identity cards.
In effect, to function as a citizen in Norway a national ID card will
be required, and to get it one need to provide the fingerprints to
the police.&lt;/p&gt;

&lt;p&gt;In addition to handing the fingerprint to the police (which
promised to not make a copy of the fingerprint image at that point in
time, but say nothing about doing it later), a picture of the
fingerprint will be stored on the RFID chip, along with a picture of
the face and other information about the person.  Some of the
information will be encrypted, but the encryption will be the same
system as currently used in the passports.  The codes to decrypt will
be available to a lot of government offices and their suppliers around
the globe, but for those that do now know anyone in those circles it
is good to know that

&lt;a href=&quot;http://www.theguardian.com/technology/2006/nov/17/news.homeaffairs&quot;&gt;the
encryption is already broken&lt;/a&gt;.  And they
&lt;a href=&quot;http://www.networkworld.com/article/2215057/wireless/bad-guys-could-read-rfid-passports-at-217-feet--maybe-a-lot-more.html&quot;&gt;can
be read from 70 meters away&lt;/a&gt;.  This can be mitigated a bit by
keeping it in a Faraday cage (metal box or metal wire container), but
one will be required to take it out of there often enough to expose
ones private and personal information to a lot of people that have no
business getting access to that information.&lt;/p&gt;

&lt;p&gt;The new Norwegian national IDs are a vehicle for identity theft,
and I feel sorry for us all having politicians accepting such invasion
of privacy without any objections.  So are the Norwegian passports,
but it has been possible to function in Norway without those so far.
That option is going away with the passing of the new law.  In this, I
envy the Germans, because for them it is optional how much biometric
information is stored in their national ID.&lt;/p&gt;

&lt;p&gt;And if forced collection of fingerprints was not bad enough, the
information collected in the national ID card register can be handed
over to foreign intelligence services and police authorities, &quot;when
extradition is not considered disproportionate&quot;.&lt;/p&gt;
</description>
        </item>
        
        <item>
                <title>What would it cost to store all phone calls in Norway?</title>
                <link>http://people.skolelinux.org/pere/blog/What_would_it_cost_to_store_all_phone_calls_in_Norway_.html</link>
                <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/What_would_it_cost_to_store_all_phone_calls_in_Norway_.html</guid>
                <pubDate>Fri, 1 May 2015 19:30:00 +0200</pubDate>
                <description>&lt;p&gt;Many years ago, a friend of mine calculated how much it would cost
to store the sound of all phone calls in Norway, and came up with the
cost of around 20 million NOK (2.4 mill EUR) for all the calls in a
year.  I got curious and wondered what the same calculation would look
like today.  To do so one need an idea of how much data storage is
needed for each minute of sound, how many minutes all the calls in
Norway sums up to, and the cost of data storage.&lt;/p&gt;

&lt;p&gt;The 2005 numbers are from
&lt;a href=&quot;http://www.digi.no/analyser/2005/10/04/vi-prater-stadig-mindre-i-roret&quot;&gt;digi.no&lt;/a&gt;,
the 2012 numbers are from
&lt;a href=&quot;http://www.nkom.no/aktuelt/nyheter/fortsatt-vekst-i-det-norske-ekommarkedet&quot;&gt;a
NKOM report&lt;/a&gt;, and I got the 2013 numbers after asking NKOM via
email.  I was told the numbers for 2014 will be presented May 20th,
and decided not to wait for those, as I doubt they will be very
different from the numbers from 2013.&lt;/p&gt;

&lt;p&gt;The amount of data storage per minute sound depend on the wanted
quality, and for phone calls it is generally believed that 8 Kbit/s is
enough.  See for example a
&lt;a href=&quot;http://www.cisco.com/c/en/us/support/docs/voice/voice-quality/7934-bwidth-consume.html#topic1&quot;&gt;summary
on voice quality from Cisco&lt;/a&gt; for some alternatives.  8 Kbit/s is 60
Kbytes/min, and this can be multiplied with the number of call minutes
to get the storage requirements.&lt;/p&gt;

&lt;p&gt;Storage prices varies a lot, depending on speed, backup strategies,
availability requirements etc.  But a simple way to calculate can be
to use the price of a TiB-disk (around 1000 NOK / 120 EUR) and double
it to take space, power and redundancy into account.  It could be much
higher with high speed and good redundancy requirements.&lt;/p&gt;

&lt;p&gt;But back to the question, What would it cost to store all phone
calls in Norway?  Not much.  Here is a small table showing the
estimated cost, which is within the budget constraint of most medium
and large organisations:&lt;/p&gt;

&lt;table border=&quot;1&quot;&gt;
&lt;tr&gt;&lt;th&gt;Year&lt;/th&gt;&lt;th&gt;Call minutes&lt;/th&gt;&lt;th&gt;Size&lt;/th&gt;&lt;th&gt;Price in NOK / EUR&lt;/th&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td&gt;2005&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;24 000 000 000&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;1.3 PiB&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;3 mill / 358 000&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td&gt;2012&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;18 000 000 000&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;1.0 PiB&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;2.2 mill / 262 000&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td&gt;2013&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;17 000 000 000&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;950 TiB&lt;/td&gt;&lt;td align=&quot;right&quot;&gt;2.1 mill / 250 000&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;

&lt;p&gt;This is the cost of buying the storage.  Maintenance need to be
taken into account too, but calculating that is left as an exercise
for the reader.  But it is obvious to me from those numbers that
recording the sound of all phone calls in Norway is not going to be
stopped because it is too expensive.  I wonder if someone already is
collecting the data?&lt;/p&gt;
</description>
        </item>
        
        <item>
                <title>First Jessie based Debian Edu beta release</title>
                <link>http://people.skolelinux.org/pere/blog/First_Jessie_based_Debian_Edu_beta_release.html</link>
                <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/First_Jessie_based_Debian_Edu_beta_release.html</guid>
                <pubDate>Sun, 26 Apr 2015 14:10:00 +0200</pubDate>
                <description>&lt;p&gt;I am happy to report that the Debian Edu team sent out
&lt;a href=&quot;https://lists.debian.org/debian-edu-announce/2015/04/msg00000.html&quot;&gt;this
announcement today&lt;/a&gt;:&lt;/p&gt;

&lt;pre&gt;
the Debian Edu / Skolelinux project is pleased to announce the first
*beta* release of Debian Edu &quot;Jessie&quot; 8.0+edu0~b1, which for the first
time is composed entirely of packages from the current Debian stable
release, Debian 8 &quot;Jessie&quot;.

(As most reading this will know, Debian &quot;Jessie&quot; hasn&#39;t actually been
released by now. The release is still in progress but should finish
later today ;)

We expect to make a final release of Debian Edu &quot;Jessie&quot; in the coming
weeks, timed with the first point release of Debian Jessie. Upgrades
from this beta release of Debian Edu Jessie to the final release will
be possible and encouraged!

Please report feedback to debian-edu@lists.debian.org and/or submit
bugs: http://wiki.debian.org/DebianEdu/HowTo/ReportBugs

Debian Edu - sometimes also known as &quot;Skolelinux&quot; - is a complete
operating system for schools, universities and other
organisations. Through its pre- prepared installation profiles
administrators can install servers, workstations and laptops which
will work in harmony on the school network.  With Debian Edu, the
teachers themselves or their technical support staff can roll out a
complete multi-user, multi-machine study environment within hours or
days.

Debian Edu is already in use at several hundred schools all over the
world, particularly in Germany, Spain and Norway. Installations come
with hundreds of applications pre-installed, plus the whole Debian
archive of thousands of compatible packages within easy reach.

For those who want to give Debian Edu Jessie a try, download and
installation instructions are available, including detailed
instructions in the manual explaining the first steps, such as setting
up a network or adding users.  Please note that the password for the
user your prompted for during installation must have a length of at
least 5 characters!

== Where to download ==

A multi-architecture CD / usbstick image (649 MiB) for network booting
can be downloaded at the following locations:

    http://ftp.skolelinux.org/skolelinux-cd/debian-edu-8.0+edu0~b1-CD.iso
    rsync -avzP ftp.skolelinux.org::skolelinux-cd/debian-edu-8.0+edu0~b1-CD.iso . 

The SHA1SUM of this image is: 54a524d16246cddd8d2cfd6ea52f2dd78c47ee0a

Alternatively an extended DVD / usbstick image (4.9 GiB) is also
available, with more software included (saving additional download
time):

    http://ftp.skolelinux.org/skolelinux-cd/debian-edu-8.0+edu0~b1-USB.iso
    rsync -avzP ftp.skolelinux.org::skolelinux-cd/debian-edu-8.0+edu0~b1-USB.iso 

The SHA1SUM of this image is: fb1f1504a490c077a48653898f9d6a461cb3c636

Sources are available from the Debian archive, see
http://ftp.debian.org/debian-cd/8.0.0/source/ for some download
options.

== Debian Edu Jessie manual in seven languages ==

Please see https://wiki.debian.org/DebianEdu/Documentation/Jessie/ for
the English version of the Debian Edu jessie manual.

This manual has been fully translated to German, French, Italian,
Danish, Dutch and Norwegian Bokmål. A partly translated version exists
for Spanish.  See http://maintainer.skolelinux.org/debian-edu-doc/ for
online version of the translated manual.

More information about Debian 8 &quot;Jessie&quot; itself is provided in the
release notes and the installation manual:
- http://www.debian.org/releases/jessie/releasenotes
- http://www.debian.org/releases/jessie/installmanual


== Errata / known problems ==

    It takes up to 15 minutes for a changed hostname to be updated via
    DHCP (#780461).

    The hostname script fails to update LTSP server hostname (#783087). 

Workaround: run update-hostname-from-ip on the client to update the
hostname immediately.

Check https://wiki.debian.org/DebianEdu/Status/Jessie for a possibly
more current and complete list.

== Some more details about Debian Edu 8.0+edu0~b1 Codename Jessie released 2015-04-25 ==

=== Software updates ===

Everything which is new in Debian 8 Jessie, e.g.:

 * Linux kernel 3.16.7-ctk9; for the i386 architecture, support for
   i486 processors has been dropped; oldest supported ones: i586 (like
   Intel Pentium and AMD K5).

 * Desktop environments KDE Plasma Workspaces 4.11.13, GNOME 3.14,
   Xfce 4.12, LXDE 0.5.6
   * new optional desktop environment: MATE 1.8
   * KDE Plasma Workspaces is installed by default; to choose one of
     the others see the manual.
 * the browsers Iceweasel 31 ESR and Chromium 41
 * LibreOffice 4.3.3
 * GOsa 2.7.4
 * LTSP 5.5.4
 * CUPS print system 1.7.5
 * new boot framework: systemd
 * Educational toolbox GCompris 14.12
 * Music creator Rosegarden 14.02
 * Image editor Gimp 2.8.14
 * Virtual stargazer Stellarium 0.13.1
 * golearn 0.9
 * tuxpaint 0.9.22
 * New version of debian-installer from Debian Jessie.
 * Debian Jessie includes about 43000 packages available for installation.
 * More information about Debian 8 Jessie is provided in its release
   notes and the installation manual, see the link above.

=== Installation changes ===

    Installations done via PXE now also install firmware automatically
    for the hardware present.

=== Fixed bugs ===

A number of bugs have been fixed in this release; the most noticeable
from a user perspective:

 * Inserting incorrect DNS information in Gosa will no longer break
   DNS completely, but instead stop DNS updates until the incorrect
   information is corrected (710362)

 * shutdown-at-night now shuts the system down if gdm3 is used (775608). 

=== Sugar desktop removed ===

As the Sugar desktop was removed from Debian Jessie, it is also not
available in Debian Edu jessie.


== About Debian Edu / Skolelinux ==

Debian Edu, also known as Skolelinux, is a Linux distribution based on
Debian providing an out-of-the box environment of a completely
configured school network. Directly after installation a school server
running all services needed for a school network is set up just
waiting for users and machines being added via GOsa², a comfortable
Web-UI. A netbooting environment is prepared using PXE, so after
initial installation of the main server from CD or USB stick all other
machines can be installed via the network. The provided school server
provides LDAP database and Kerberos authentication service,
centralized home directories, DHCP server, web proxy and many other
services.  The desktop contains more than 60 educational software
packages and more are available from the Debian archive, and schools
can choose between KDE, GNOME, LXDE, Xfce and MATE desktop
environment.

== About Debian ==

The Debian Project was founded in 1993 by Ian Murdock to be a truly
free community project. Since then the project has grown to be one of
the largest and most influential open source projects. Thousands of
volunteers from all over the world work together to create and
maintain Debian software. Available in 70 languages, and supporting a
huge range of computer types, Debian calls itself the universal
operating system.

== Thanks ==

Thanks to everyone making Debian and Debian Edu / Skolelinux happen!
You rock.
&lt;/pre&gt;
</description>
        </item>
        
        <item>
                <title>Debian Edu interview: Shirish Agarwal</title>
                <link>http://people.skolelinux.org/pere/blog/Debian_Edu_interview__Shirish_Agarwal.html</link>
                <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Debian_Edu_interview__Shirish_Agarwal.html</guid>
                <pubDate>Wed, 15 Apr 2015 09:20:00 +0200</pubDate>
                <description>&lt;p&gt;It was a surprise to me to learn that project to create a complete
computer system for schools I&#39;ve involved in,
&lt;a href=&quot;http://www.skolelinux.org/&quot;&gt;Debian Edu / Skolelinux&lt;/a&gt;, was
being used in India.  But apparently it is, and I managed to get an
interview with one of the friends of the project there, Shirish
Agarwal.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Who are you, and how do you spend your days?&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;My name is Shirish Agarwal. Based out of the educational and
historical city of Pune, from the western state of Maharashtra, India.
My bread comes from giving training, giving policy tips,
installations on free software to mom and pop shops in different
fields from Desktop publishing to retail shops as well as work with
few software start-ups as well.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;How did you get in contact with the Skolelinux / Debian Edu
project?&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;It started innocently enough. I have been using Debian for a few
years and in one local minidebconf / debutsav I was asked if there was
anything for schools or education. I had worked / played with free
educational softwares such as Gcompris and Stellarium for my many
nieces and nephews so researched and found Debian Edu or Skolelinux as
it was known then.  Since then I have started using the various
education meta-packages provided by the project.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;What do you see as the advantages of Skolelinux / Debian
Edu?&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;It&#39;s closest I have seen where a package full of educational
software are packed, which are free and open (both literally and
figuratively).  Even if I take the simplest software which is
gcompris, the number of activities therein are amazing. Another one of
the softwares that I have liked for a long time is stellarium. Even
pysycache is cool except for couple of issues I encountered
&lt;a href=&quot;https://bugs.debian.org/781841&quot;&gt;#781841&lt;/a&gt; and
&lt;a href=&quot;https://bugs.debian.org/781842&quot;&gt;#781842&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;I prefer software installed on the system over web based solutions,
as a web site can disappear any time but the software on disk has the
possibility of a larger life span.  Of course with both it&#39;s more a
question if it has enough users who make it fun or sustainable or both
for the developer per-se.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;What do you see as the disadvantages of Skolelinux / Debian
Edu?&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;I do see that the Debian Edu team seems to be short-handed and I
think more efforts should be made to make it popular and ask and take
help from people and the larger community wherever possible.&lt;/p&gt;

&lt;p&gt;I don&#39;t see any disadvantage to use Skolelinux apart from the fact
that most apps. are generic which is good or bad how you see it.
However, saying that I do acknowledge the fact that the canvas is
pretty big and there are lot of interesting ideas that could be done
but for reasons not known not done or if done I don&#39;t know about them.
Let me share some of the ideas (these are more upstream based but
still) I have had for a long time :&lt;/p&gt;

&lt;p&gt;1. Classical maths question of two trains in opposing directions
each running @x kmph/mph at y distance, when they will meet and how
far would each travel and similar questions like these.

&lt;p&gt;The computer is a fantastic system where questions like these can
be drawn, animated and the methodology and answers teased out in
interactive manner. While sites such as the
&lt;a href=&quot;http://mathforum.org/dr.math/faq/faq.two.trains.html&quot;&gt;Ask
Dr. Math FAQ on The Two Trains problem&lt;/a&gt; (as an example or point of
inspiration) can be used there is lot more that can be done.  I dunno
if there is a free software which does something like this.  The idea
being a blend of objects + animation + interaction which does
this. The whole interaction could be gamified with points or sounds or
colourful celebration whenever the user gets even part of the question
or/and methodology right. That would help reinforce good behaviour.
This understanding could be used to share/showcase everything from how
the first wheel came to be, to evolution to how astronomy started,
psychics and everything in-between.&lt;/p&gt;

&lt;p&gt;One specific idea in the train part was having the Linux mascot on
one train and the BSD or GNU mascot on the other train and they
meeting somewhere in-between. Characters from blender movies could
also be used.&lt;/p&gt;

&lt;p&gt;2. Loads of crossword-puzzles with reference to subjects: We have
enormous data sets in Wikipedia and Wikitionary.  I don&#39;t think it
should be a big job to design crossword puzzles. Using categories and
sub-categories it should be doable to have Q&amp;A single word answers
from the existing data-sets. What would make it easy or hard could be
the length of the word + existence of many or few vowels depending on
the user&#39;s input.&lt;/p&gt;

&lt;p&gt;3. Jigsaw puzzles - We already have a great software called
palapeli with number of slicers making it pretty interesting. What
needs to be done is to download large number of public domain and
copyleft images, tease and use IPTC tags to categorise them into
nature, history etc.  and let it loose. This could turn to be really
huge collection of images. One source could be taken from
commons.wikimedia.org, others could be huge collection of royalty-free
stock photos. Potential is immense.&lt;/p&gt;

&lt;p&gt;Apart from this, free software suffers in two directions, we lag
both in development (of using new features per-se) and maintenance a
lot.  This is more so in educational software as these applications
need to be timely and the opportunity cost of missing deadlines is
immense. If we are able to solve issues of funding for development and
maintenance of such software I don&#39;t see any big difficulties. I know
of few start-ups in and around India who would love to develop and
maintain such software if funding issues could be solved.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Which free software do you use daily?&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;That would be huge list. Some of the softwares are obviously apt,
aptitude, debdelta, leafpad, the shell of course (zsh nowadays),
quassel for IRC. In games I use shisen-sho while card-games are evenly
between kpat and Aiselriot.  In desktops it&#39;s a tie between
gnome-flashback and mate.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Which strategy do you believe is the right one to use to
get schools to use free software?&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;I think it should first start with using specific FOSS apps. in
whatever environment they are. If it&#39;s MS-Windows or Mac so be it.
Once they are habitual with the apps. and there is buy-in from the
school management then it could be installed anywhere. Most of the
people now understand the concept of a repository because of the
various online stores so it isn&#39;t hard to convince on that front.&lt;/p&gt;

&lt;p&gt;What is harder is having enough people with technical skills and
passion to service them. If you get buy-in from one or two teachers
then ideas like above could also be asked to be done as a project as
well.&lt;/p&gt;

&lt;p&gt;I think where we fall short more than anything is in marketing. For
instance, Debian has this whole range of fonts in its archive but
there isn&#39;t even a page where all those different fonts in the La
Ipsum format could be tried out for newcomers.&lt;/p&gt;

&lt;p&gt;One of the issues faced constantly in installations is with updates
and upgrades.  People have this myth that each update and upgrade
means the user interface will / has to change. I have seen this
innumerable times.  That perhaps is one of the reasons which browsers
like Iceweasel / Firefox change user interfaces so much, not because
it might be needed or be functional but because people believe that
changed user interfaces are better. This, can easily be pointed with
the user interfaces changed with almost every MS-Windows and Mac OS
releases.&lt;/p&gt;

&lt;p&gt;The problems with Debian Edu for deployment are many. The biggest
is the huge gap between what is taught in schools and what Debian Edu
is aimed at.

&lt;p&gt;Me and my friends did teach on week-ends in a government school for
around 2 years, and
&lt;a href=&quot;https://flossexperiences.wordpress.com/2012/10/08/sharings/&quot;&gt;gathered
some experience&lt;/a&gt; there.  Some of the things we learnt/discovered
there was :&lt;/p&gt;

&lt;ol&gt;

  &lt;li&gt;Most of the teachers are very territorial about their subjects
   and they do not want you to teach anything out of the
   portion/syllabus given.&lt;/li&gt;

  &lt;li&gt;They want any activity on the system in accordance to whatever
   is in the syllabus.&lt;/li&gt;

  &lt;li&gt;There are huge barriers both with the English language and at
   times with objects or whatever. An example, let&#39;s say in gcompris
   you have objects falling down and you have to name them and let&#39;s
   say the falling object is a hat or a fedora hat, this would not be
   as recognizable as say a
   &lt;a href=&quot;https://en.wikipedia.org/wiki/Puneri_Pagadi&quot;&gt;Puneri
   Pagdi&lt;/a&gt; so there is need to inject local objects, words wherever
   possible. Especially for word-games there are so many hindi words
   which have become part of english vocabulary (for instance in
   parley), those could be made into a hinglish collection or
   something but that is something for upstream to do.&lt;/li&gt;

&lt;/ol&gt;
</description>
        </item>
        
        <item>
                <title>I&#39;m going to the Open Source Developers&#39; Conference Nordic 2015!</title>
                <link>http://people.skolelinux.org/pere/blog/I_m_going_to_the_Open_Source_Developers__Conference_Nordic_2015_.html</link>
                <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/I_m_going_to_the_Open_Source_Developers__Conference_Nordic_2015_.html</guid>
                <pubDate>Tue, 7 Apr 2015 10:30:00 +0200</pubDate>
                <description>&lt;p&gt;I am happy to let you all know that I&#39;m going to the &lt;a
href=&quot;http://act.osdc.no/osdc2015no/&quot;&gt;Open Source Developers&#39;
Conference Nordic 2015&lt;/a&gt;!&lt;/p&gt;

&lt;p&gt;It take place Friday 8th to Sunday 10th of May in Oslo next to
where I work, and I finally got around to submitting
&lt;a href=&quot;http://act.osdc.no/osdc2015no/talk/6192&quot;&gt;a talk proposal for
it&lt;/a&gt; (dead link for most people until the talk is accepted).  As
part of my involvement with the
&lt;a href=&quot;http://www.nuug.no/&quot;&gt;Norwegian Unix User Group member
association&lt;/a&gt; I have been slightly involved in the planning of this
conference for a while now, with a focus on organising a Civic Hacking
Hackathon with our friends
over at &lt;a href=&quot;http://www.mysociety.org/&quot;&gt;mySociety&lt;/a&gt; and
&lt;a href=&quot;http://www.holderdeord.no/&quot;&gt;Holder de ord&lt;/a&gt;.  This part is
named the &#39;My Society&#39; track in the program.  There is still space for
more talks and participants.  I hope to see you there.&lt;/p&gt;

&lt;p&gt;Check out &lt;a href=&quot;http://act.osdc.no/osdc2015no/talks&quot;&gt;the talks
submitted and accepted so far&lt;/a&gt;.&lt;/p&gt;
</description>
        </item>
        
        <item>
                <title>Proof reading the Norwegian translation of Free Culture by Lessig</title>
                <link>http://people.skolelinux.org/pere/blog/Proof_reading_the_Norwegian_translation_of_Free_Culture_by_Lessig.html</link>
                <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Proof_reading_the_Norwegian_translation_of_Free_Culture_by_Lessig.html</guid>
                <pubDate>Sat, 4 Apr 2015 09:30:00 +0200</pubDate>
                <description>&lt;p&gt;During eastern I had some time to continue working on the Norwegian
&lt;a href=&quot;http://www.docbook.org/&quot;&gt;docbook&lt;/a&gt; version of the 2004 book
&lt;a href=&quot;http://free-culture.cc/&quot;&gt;Free Culture&lt;/a&gt; by Lawrence Lessig.
At the moment I am proof reading the finished text, looking for typos,
inconsistent wordings and sentences that do not flow as they should.
I&#39;m more than two thirds done with the text, and welcome others to
check the text up to chapter 13.  The current status is available on the
&lt;a href=&quot;https://github.com/petterreinholdtsen/free-culture-lessig&quot;&gt;github&lt;/a&gt;
project pages.  You can also check out the 
&lt;a href=&quot;https://github.com/petterreinholdtsen/free-culture-lessig/blob/master/archive/freeculture.nb.pdf?raw=true&quot;&gt;PDF&lt;/a&gt;,
&lt;a href=&quot;https://github.com/petterreinholdtsen/free-culture-lessig/blob/master/archive/freeculture.nb.epub?raw=true&quot;&gt;EPUB&lt;/a&gt;
and HTML version available in the
&lt;a href=&quot;https://github.com/petterreinholdtsen/free-culture-lessig/tree/master/archive&quot;&gt;archive
directory&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Please report typos, bugs and improvements to the github project if
you find any.&lt;/p&gt;
</description>
        </item>
        
        <item>
                <title>Frikanalen, Norwegian TV channel for technical topics</title>
                <link>http://people.skolelinux.org/pere/blog/Frikanalen__Norwegian_TV_channel_for_technical_topics.html</link>
                <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Frikanalen__Norwegian_TV_channel_for_technical_topics.html</guid>
                <pubDate>Mon, 9 Mar 2015 11:10:00 +0100</pubDate>
                <description>&lt;p&gt;The &lt;a href=&quot;http://www.nuug.no/&quot;&gt;Norwegian Unix User Group&lt;/a&gt;,
where I am a member, and where people interested in free software,
open standards and UNIX like operating systems like Linux and the BSDs
come together, record our monthly technical presentations on video.
The purpose is to document the talks and spread them to a wider
audience.  For this, the the Norwegian nationwide open channel
&lt;a href=&quot;http://www.frikanalen.no/&quot;&gt;Frikanalen&lt;/a&gt; is a useful venue.
Since a few days ago, when I figured out the
&lt;a href=&quot;http://beta.frikanalen.no/api/&quot;&gt;REST API&lt;/a&gt; to program the
&lt;a href=&quot;http://beta.frikanalen.tv/guide/&quot;&gt;channel time schedule&lt;/a&gt;,
the channel has been filled with NUUG talks, related recordings and
some Creative Commons licensed TED talks (from archive.org).  I fill
all &quot;leftover bits&quot; on the channel with content from NUUG, which at
the moment is almost 17 of 24 hours every day.&lt;/p&gt;

&lt;p&gt;The list of NUUG videos
&lt;a href=&quot;http://beta.frikanalen.tv/organization/82&quot;&gt;uploaded so far&lt;/a&gt;
include things like a
&lt;a href=&quot;http://beta.frikanalen.tv/video/625090&quot;&gt;one hour talk by John
Perry Barlow when he visited Oslo&lt;/a&gt;, a presentation of
&lt;a href=&quot;http://beta.frikanalen.tv/video/624275&quot;&gt;Haiku, the BeOS
re-implementation&lt;/a&gt;, the
&lt;a href=&quot;http://beta.frikanalen.tv/video/624493&quot;&gt;history of FiksGataMi,
the Norwegian version of FixMyStreet&lt;/a&gt;, the good old
&lt;a href=&quot;http://beta.frikanalen.tv/video/623566&quot;&gt;Warriors of the net
video&lt;/A&gt; and many others.&lt;/p&gt;

&lt;p&gt;We have a large backlog of NUUG talks not yet uploaded to
Frikanalen, and plan to upload every useful bit to the channel to
spread the word there.  I also hope to find useful recordings from the
Chaos Computer Club and Debian conferences and spread them on the
channel as well.  But this require locating the videos and their meta
information (title, description, license, etc), and preparing the
recordings for broadcast, and I have not yet had the spare time to
focus on this.  Perhaps you want to help.  Please join us on IRC,
&lt;a href=&quot;irc://irc.freenode.net/%23nuug&quot;&gt;#nuug on irc.freenode.net&lt;/a&gt;
if you want to help make this happen.&lt;/p&gt;

&lt;p&gt;But as I said, already the channel is already almost exclusively
filled with technical topics, and if you want to learn something new
today, check out the &lt;a href=&quot;http://www.frikanalen.tv/se&quot;&gt;Ogg Theora
web stream&lt;/a&gt; or use one of the other ways to get access to the
channel.  Unfortunately the Ogg Theora recoding for distribution still
do not properly sync the video and sound.  It is generated by recoding
a internal MPEG transport stream with MPEG4 coded video (ie H.264) to
Ogg Theora / Vorbis, and we have not been able to find a way that
produces acceptable quality.  Help needed, please get in touch if you
know how to fix it using free software.&lt;/p&gt;
</description>
        </item>
        
        <item>
                <title>The Citizenfour documentary on the Snowden confirmations to Norway</title>
                <link>http://people.skolelinux.org/pere/blog/The_Citizenfour_documentary_on_the_Snowden_confirmations_to_Norway.html</link>
                <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/The_Citizenfour_documentary_on_the_Snowden_confirmations_to_Norway.html</guid>
                <pubDate>Sat, 28 Feb 2015 22:10:00 +0100</pubDate>
                <description>&lt;p&gt;Today I was happy to learn that the documentary
&lt;a href=&quot;https://citizenfourfilm.com/&quot;&gt;Citizenfour&lt;/a&gt; by
&lt;a href=&quot;https://en.wikipedia.org/wiki/Laura_Poitras&quot;&gt;Laura Poitras&lt;/a&gt;
finally will show up in Norway.  According to the magazine
&lt;a href=&quot;http://montages.no/&quot;&gt;Montages&lt;/a&gt;, a deal has finally been
made for
&lt;a href=&quot;http://montages.no/nyheter/snowden-dokumentaren-citizenfour-far-norsk-kinodistribusjon/&quot;&gt;Cinema
distribution in Norway&lt;/a&gt; and the movie will have its premiere soon.
This is great news.  As part of my involvement with
&lt;a href=&quot;http://www.nuug.no/&quot;&gt;the Norwegian Unix User Group&lt;/a&gt;, me and
a friend have
&lt;a href=&quot;http://www.nuug.no/news/Dokumentar_om_Snowdenbekreftelsene_til_Norge_.shtml&quot;&gt;tried
to get the movie to Norway&lt;/a&gt; ourselves, but obviously
&lt;a href=&quot;http://www.nuug.no/news/Dokumentar_om_Snowdenbekreftelsene_endelig_til_Norge_.shtml&quot;&gt;we
were too late&lt;/a&gt; and Tor Fosse beat us to it.  I am happy he did, as
the movie will make its way to the public and we do not have to make
it happen ourselves.
&lt;a href=&quot;https://www.youtube.com/watch?v=XiGwAvd5mvM&quot;&gt;The trailer&lt;/a&gt;
can be seen on youtube, if you are curious what kind of film this
is.&lt;/p&gt;

&lt;p&gt;The whistle blower Edward Snowden really deserve political asylum
here in Norway, but I am afraid he would not be safe.&lt;/p&gt;
</description>
        </item>
        
        <item>
                <title>The Norwegian open channel Frikanalen - 24x7 on the Internet</title>
                <link>http://people.skolelinux.org/pere/blog/The_Norwegian_open_channel_Frikanalen___24x7_on_the_Internet.html</link>
                <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/The_Norwegian_open_channel_Frikanalen___24x7_on_the_Internet.html</guid>
                <pubDate>Wed, 25 Feb 2015 09:10:00 +0100</pubDate>
                <description>&lt;p&gt;The Norwegian nationwide open channel
&lt;a href=&quot;http://www.frikanalen.no/&quot;&gt;Frikanalen&lt;/a&gt; is still going
strong.  It allow everyone to send the video they want on national
television.  It is a TV station administrated completely using a web
browser, running only &lt;ahref=&quot;https://github.com/Frikanalen&quot;&gt;Free
Software&lt;/a&gt;, providing &lt;ahref=&quot;http://beta.frikanalen.tv/api&quot;&gt;a REST
api&lt;/a&gt; for administrators and members, and with distribution on the
national DVB-T distribution network RiksTV.  But only between 12:00
and 17:30 Norwegian time.  This has finally changed, after many years
with limited distribution.  A few weeks ago, we set up a Ogg Theora
stream via icecast to allow everyone with Internet access to check out
the channel the rest of the day.  This is presented on
&lt;a href=&quot;http://www.frikanalen.tv/se&quot;&gt;the Frikanalen web site now&lt;/a&gt;.  And
since a few days ago, the channel is also available
via &lt;a href=&quot;https://www.uninett.no/iptv-tilgang&quot;&gt;multicast on
UNINETT&lt;/a&gt;, available for those using IPTV TVs and set-top boxes in
the Norwegian National Research and Education network.&lt;/p&gt;

&lt;p&gt;If you want to see what is on the channel, point your media player
to one of these sources.  The first should work with most players and
browsers, while as far as I know, the multicast UDP stream only work
with VLC.&lt;/p&gt;

&lt;ul&gt;
  &lt;li&gt;&lt;a href=&quot;http://video.nuug.no/frikanalen.ogv&quot;&gt;http://video.nuug.no/frikanalen.ogv&lt;/a&gt;&lt;/li&gt;
  &lt;li&gt;udp://@224.17.43.129:1234&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;The Ogg Theora / icecast stream is not working well, as the video
and audio is slightly out of sync.  We have not been able to figure
out how to fix it.  It is generated by recoding a internal MPEG
transport stream with MPEG4 coded video (ie H.264) to Ogg Theora /
Vorbis, and the result is less then stellar.  If you have ideas how to
fix it, please let us know on frikanalen (at) nuug.no.  We currently
use this with ffmpeg2theora 0.29:&lt;/p&gt;

&lt;blockquote&gt;&lt;pre&gt;
./ffmpeg2theora.linux &amp;lt;OBE_gemini_URL.ts&amp;gt; -F 25 -x 720 -y 405 \
 --deinterlace --inputfps 25 -c 1 -H 48000 --keyint 8 --buf-delay 100 \
 --nosync -V 700 -o - | oggfwd video.nuug.no 8000 &amp;lt;pw&amp;gt; /frikanalen.ogv
&lt;/pre&gt;&lt;/blockquote&gt;

&lt;p&gt;If you get the multicast UDP stream working, please let me know, as
I am curious how far the multicast stream reach.  It do not make it to
my home network, nor any other commercially available network in
Norway that I am aware of.&lt;/p&gt;
</description>
        </item>
        
        <item>
                <title>En enklere Osloskolehverdag med automatisk sjekk av Fronter</title>
                <link>http://people.skolelinux.org/pere/blog/En_enklere_Osloskolehverdag_med_automatisk_sjekk_av_Fronter.html</link>
                <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/En_enklere_Osloskolehverdag_med_automatisk_sjekk_av_Fronter.html</guid>
                <pubDate>Thu, 12 Feb 2015 10:30:00 +0100</pubDate>
                <description>&lt;p&gt;En stund nå har jeg vært nødt til å forholde meg til
&lt;a href=&quot;https://fronter.com/osloskoler/&quot;&gt;Fronter&lt;/a&gt;, en nettløsning
Osloskolen bruker for kontakt mellom hjem og skole.  Løsningen
imponerer ikke, og det er lagt opp til at vi foreldre skal logge inn
regelmessig for å se om noe har endret seg.  Idéen om å la folk stikke
innom nettsider for å se om det har skjedd endringer er så idiotisk at
jeg har lett etter et alternativ.  Fronterløsningen har en innebygget
løsning der en kan abonnere på forsiden (som viser en oppsummering av
det en har tilgang til), og få tilsendt en kopi hver natt, men det
fjerner jo bare behovet for å stikke innom, ikke den idiotiske ideen
om at folk skal huske hvordan nettsiden så ut sist og oppdage hva som
er endret.&lt;/p&gt;

&lt;p&gt;For å gjøre livet enklere har jeg derfor brukt litt tid på å lage
et program som kobler seg opp og sjekker etter endringer automatisk,
slik at jeg kan få beskjed fra datamaskinen når noe endrer seg i
stedet for å forsøke å finne ut av det selv.  I går ble scriptet
brukbart, og jeg er dermed klar til å dele det med deg.&lt;/p&gt;

&lt;p&gt;Jeg startet med å skrive programmet i Python, og hadde en versjon
som logget inn og hentet ned enkeltsider fra Fronter.  Men
Fronter-websidene suger golfballer gjennom en hageslange, med
uleselig HTML, flere nivåer av iframes og en struktur på innholdet som
er svært vanskelig å finne ut av, så jeg ga til slutt opp lxml-parsing
med Python og forsøkte meg med WWW::Mechanize for Perl som jeg kjente
fra før.  I ettertid har jeg oppdaget at WWW:Mechanize også finnes for
Python, så jeg kunne antagelig droppet språkbyttet.  Men da jeg
oppdaget det hadde jeg kommet så langt med Perl-utgaven, så jeg hoppet
ikke tilbake.&lt;/p&gt;

&lt;p&gt;For å logge inn i Fronter besøker en enten skolens websider eller
den sentrale innloggingsiden &lt;tt&gt;https://fronter.com/osloskoler/&lt;/tt&gt;.
Perl-koden for å logge inn ser slik ut:&lt;/p&gt;

&lt;pre&gt;
my $mech = WWW::Mechanize-&gt;new();
$mech-&gt;get(&#39;https://fronter.com/osloskoler/&#39;);
$mech-&gt;submit_form(fields =&gt; {
    username =&gt; $username,
    password =&gt; $password,
} );
&lt;/pre&gt;

&lt;p&gt;Neste steg er å få oversikt over hvilke «rom» en har tilgang til.
På vår skole er det rom for skolen, biblioteket, elevrådet,
aktivitetsskolen og klasser der en har unger, og dette vil være
forskjellig fra person til person.  Etter å ha romstert rundt i
Fronter-grensesnittet endel kom jeg over en grei HTML-side med
oversikt over rommene,
&lt;tt&gt;https://fronter.com/osloskoler/adm/projects.phtml?mode=displayRoomchooser&lt;/tt&gt;,
så jeg bruker denne til å hente ut romoversikt med rom-ID.&lt;/p&gt;

&lt;pre&gt;
my %room;
$mech-&gt;get(&#39;https://fronter.com/osloskoler/adm/projects.phtml?mode=displayRoomchooser&#39;);
for my $link ($mech-&gt;links()) {
    my $url = $link-&gt;url();
    if ($url =~ m%/links/list_files.phtml\?edit=(\d+)$%) {
        $room{$link-&gt;text()} = $1;
    }
}
&lt;/pre&gt;

&lt;p&gt;Når en har rom-ID kan en slå opp websiden for rommet, som starter
på
&lt;tt&gt;https://fronter.com/osloskoler/contentframeset.phtml?goto_prjid=$ROMID&lt;/tt&gt;
(der $ROMID byttes ut med rom-ID-tallet).  Det gir en side med
iframes, og en må tre nivåer ned i iframes før en får tak i
HTML-informasjonen som vises frem når en ser på det aktuelle rommet.
Her ga jeg opp den robuste parsingen og hardkodet endel URL-er som i
stedet bør spores opp maskinelt.  HTML-informasjonen som vises lagres
i en fil etter at økt- og innloggings-nøkkel er fjernet og deretter
bruker jeg &lt;tt&gt;lynx --dump --nolist&lt;/tt&gt; for å hente ut en tekstlig
utgave av websiden.  Denne tekstlige utgaven sammenlignes med forrige
versjon og oversikt over endringer kan så sendes ut på egnet vis.&lt;/p&gt;

&lt;p&gt;Jeg valgte å bruke git til å holde rede på endringer, så jeg
sjekker inn HTML og tekst-utgaver i git og bruker git til å vise frem
endringene i tekstutgavene.  Programvaren for å gjøre dette er testet
på Debian GNU/Linux og kan
&lt;a href=&quot;https://github.com/petterreinholdtsen/fronter-scraper-oslo&quot;&gt;lastes
ned fra github&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;For å bruke dette selv, kjør følgende kommandoer på din
Debian-maskin (forutsetter sudo-tilgang for installasjon av
programvare):&lt;/p&gt;

&lt;pre&gt;
sudo apt-get install git lynx-cur libio-prompter-perl libwww-mechanize-perl \
      libconfig-inifiles-perl
git clone https://github.com/petterreinholdtsen/fronter-scraper-oslo
cd fronter-scraper-oslo
./update-git
&lt;/pre&gt;

&lt;p&gt;Det gjenstår endel, men systemet er allerede nyttig for meg.  Jeg
ønsker at systemet også skal laste ned PDF-er og slikt som er lagt ut
for nedlasting på sidene, slik at f.eks. ukeplaner kommer inn i
git-arkivet mitt automatisk og jeg får automatisk beskjed når ny
ukeplan er lagt ut.  Kanskje du kan bidra med å få det på plass, eller
kanskje du har andre ting du vil fikse?  Jeg tar gjerne imot endringer
og forbedringer.  Det er mye som kan gjøres bedre, og scriptet er ikke
veldig robust mot endringer hos nettsidene til Fronter.  Jeg regner
dermed med at det vil trengs oppdateringer jevnlig etter hvert som
Fronter-løsningen endrer seg.&lt;/p&gt;
</description>
        </item>
        
        </channel>
</rss>