Ny posting.

[homepage.git] / blog / index.rss

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-               <title>A manual for standards wars...</title>
-               <link>http://people.skolelinux.org/pere/blog/A_manual_for_standards_wars___.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/A_manual_for_standards_wars___.html</guid>
-                <pubDate>Sun, 6 Jun 2010 14:15:00 +0200</pubDate>
+               <title>Some notes on Flash in Debian and Debian Edu</title>
+               <link>http://people.skolelinux.org/pere/blog/Some_notes_on_Flash_in_Debian_and_Debian_Edu.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Some_notes_on_Flash_in_Debian_and_Debian_Edu.html</guid>
+                <pubDate>Sat, 4 Sep 2010 10:10:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;Via the
-&lt;a href=&quot;http://feedproxy.google.com/~r/robweir/antic-atom/~3/QzU4RgoAGMg/weekly-links-10.html&quot;&gt;blog
-of Rob Weir&lt;/a&gt; I came across the very interesting essay named
-&lt;a href=&quot;http://faculty.haas.berkeley.edu/shapiro/wars.pdf&quot;&gt;The Art of
-Standards Wars&lt;/a&gt; (PDF 25 pages).  I recommend it for everyone
-following the standards wars of today.&lt;/p&gt;
+&lt;p&gt;In the &lt;a href=&quot;http://popcon.debian.org/unknown/by_vote&quot;&gt;Debian
+popularity-contest numbers&lt;/a&gt;, the adobe-flashplugin package the
+second most popular used package that is missing in Debian.  The sixth
+most popular is flashplayer-mozilla.  This is a clear indication that
+working flash is important for Debian users.  Around 10 percent of the
+users submitting data to popcon.debian.org have this package
+installed.&lt;/p&gt;
+
+&lt;p&gt;In the report written by Lars Risan in August 2008
+(«&lt;a href=&quot;http://wiki.skolelinux.no/Dokumentasjon/Rapporter?action=AttachFile&amp;do=view&amp;target=Skolelinux_i_bruk_rapport_1.0.pdf&quot;&gt;Skolelinux
+i bruk – Rapport for Hurum kommune, Universitetet i Agder og
+stiftelsen SLX Debian Labs&lt;/a&gt;»), one of the most important problems
+schools experienced with &lt;a href=&quot;http://www.skolelinux.org/&quot;&gt;Debian
+Edu/Skolelinux&lt;/a&gt; was the lack of working Flash.  A lot of educational
+web sites require Flash to work, and lacking working Flash support in
+the web browser and the problems with installing it was perceived as a
+good reason to stay with Windows.&lt;/p&gt;
+
+&lt;p&gt;I once saw a funny and sad comment in a web forum, where Linux was
+said to be the retarded cousin that did not really understand
+everything you told him but could work fairly well.  This was a
+comment regarding the problems Linux have with proprietary formats and
+non-standard web pages, and is sad because it exposes a fairly common
+understanding of whose fault it is if web pages that only work in for
+example Internet Explorer 6 fail to work on Firefox, and funny because
+it explain very well how annoying it is for users when Linux
+distributions do not work with the documents they receive or the web
+pages they want to visit.&lt;/p&gt;
+
+&lt;p&gt;This is part of the reason why I believe it is important for Debian
+and Debian Edu to have a well working Flash implementation in the
+distribution, to get at least popular sites as Youtube and Google
+Video to working out of the box.  For Squeeze, Debian have the chance
+to include the latest version of Gnash that will make this happen, as
+the new release 0.8.8 was published a few weeks ago and is resting in
+unstable.  The new version work with more sites that version 0.8.7.
+The Gnash maintainers have asked for a freeze exception, but the
+release team have not had time to reply to it yet.  I hope they agree
+with me that Flash is important for the Debian desktop users, and thus
+accept the new package into Squeeze.&lt;/p&gt;

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-               <title>Sitesummary tip: Listing computer hardware models used at site</title>
-               <link>http://people.skolelinux.org/pere/blog/Sitesummary_tip__Listing_computer_hardware_models_used_at_site.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Sitesummary_tip__Listing_computer_hardware_models_used_at_site.html</guid>
-                <pubDate>Thu, 3 Jun 2010 12:05:00 +0200</pubDate>
+               <title>My first perl GUI application - controlling a Spykee robot</title>
+               <link>http://people.skolelinux.org/pere/blog/My_first_perl_GUI_application___controlling_a_Spykee_robot.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/My_first_perl_GUI_application___controlling_a_Spykee_robot.html</guid>
+                <pubDate>Wed, 1 Sep 2010 21:00:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;When using sitesummary at a site to track machines, it is possible
-to get a list of the machine types in use thanks to the DMI
-information extracted from each machine.  The script to do so is
-included in the sitesummary package, and here is example output from
-the Skolelinux build servers:&lt;/p&gt;
-
-&lt;blockquote&gt;&lt;pre&gt;
-maintainer:~# /usr/lib/sitesummary/hardware-model-summary
-  vendor                    count
-  Dell Computer Corporation     1
-    PowerEdge 1750              1
-  IBM                           1
-    eserver xSeries 345 -[8670M1X]-     1
-  Intel                         2
-  [no-dmi-info]                 3
-maintainer:~#
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;p&gt;The quality of the report depend on the quality of the DMI tables
-provided in each machine.  Here there are Intel machines without model
-information listed with Intel as vendor and mo model, and virtual Xen
-machines listed as [no-dmi-info].  One can add -l as a command line
-option to list the individual machines.&lt;/p&gt;
-
-&lt;p&gt;A larger list is
-&lt;a href=&quot;http://narvikskolen.no/sitesummary/&quot;&gt;available from the the
-city of Narvik&lt;/a&gt;, which uses Skolelinux on all their shools and also
-provide the basic sitesummary report publicly.  In their report there
-are ~1400 machines. I know they use both Ubuntu and Skolelinux on
-their machines, and as sitesummary is available in both distributions,
-it is trivial to get all of them to report to the same central
-collector.&lt;/p&gt;
+&lt;p&gt;This evening I made my first Perl GUI application.  The last few
+days I have worked on a Perl module for controlling my recently
+aquired Spykee robots, and the module is now getting complete enought
+that it is possible to use it to control the robot driving at least.
+It was now time to figure out how to use it to create some GUI to
+allow me to drive the robot around.  I picked PerlQt as I have had
+positive experiences with the Qt API before, and spent a few minutes
+browsing the web for examples.  Using Qt Designer seemed like a short
+cut, so I ended up writing the perl GUI using Qt Designer and
+compiling it into a perl program using the puic program from
+libqt-perl.  Nothing fancy yet, but it got buttons to connect and
+drive around.&lt;/p&gt;
+
+&lt;p&gt;The perl module I have written provide a object oriented API for
+controlling the robot.  Here is an small example on how to use it:&lt;/p&gt;
+
+&lt;p&gt;&lt;pre&gt;
+use Spykee;
+Spykee::discover(sub {$robot{$_[0]} = $_[1]});
+my $host = (keys %robot)[0];
+my $spykee = Spykee-&gt;new();
+$spykee-&gt;contact($host, &quot;admin&quot;, &quot;admin&quot;);
+$spykee-&gt;left();
+sleep 2;
+$spykee-&gt;right();
+sleep 2;
+$spykee-&gt;forward();
+sleep 2;
+$spykee-&gt;back();
+sleep 2;
+$spykee-&gt;stop();
+&lt;/pre&gt;&lt;/p&gt;
+
+&lt;p&gt;Thanks to the release of the source of the robot firmware, I could
+peek into the implementation at the other end to figure out how to
+implement the protocol used by the robot.  I&#39;ve implemented several of
+the commands the robot understand, but is still missing the camera
+support to make it possible to control the robot from remote.  First I
+want to implement support for uploading new firmware and configuring
+the wireless network, to make it possible to bootstrap a Spykee robot
+without the producers Windows and MacOSX software (I only have Linux,
+so I had to ask a friend to come over to get the robot testing
+going. :).&lt;/p&gt;
+
+&lt;p&gt;Will release the source to the public soon, but need to figure out
+where to make it available first.  I will add a link to 
+&lt;a href=&quot;http://wiki.nuug.no/grupper/robot/&quot;&gt;the NUUG wiki&lt;/a&gt; for
+those that want to check back later to find it.&lt;/p&gt;

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-               <title>Togsatsing på norsk, mot sykkel</title>
-               <link>http://people.skolelinux.org/pere/blog/Togsatsing_p___norsk__mot_sykkel.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Togsatsing_p___norsk__mot_sykkel.html</guid>
-                <pubDate>Wed, 2 Jun 2010 23:45:00 +0200</pubDate>
+               <title>Forslag i stortinget om å stoppe elektronisk stemmegiving i Norge</title>
+               <link>http://people.skolelinux.org/pere/blog/Forslag_i_stortinget_om____stoppe_elektronisk_stemmegiving_i_Norge.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Forslag_i_stortinget_om____stoppe_elektronisk_stemmegiving_i_Norge.html</guid>
+                <pubDate>Tue, 31 Aug 2010 21:00:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;Det står dårlig til med toget når en finner på å la det
-&lt;a href=&quot;http://www.aftenposten.no/nyheter/iriks/article3677060.ece&quot;&gt;kappkjøre
-med sykkel&lt;/a&gt;...  Jeg tror det trengs strukturendringer for å få
-fikset på togproblemene i Norge.&lt;/p&gt;
-
-&lt;p&gt;Mon tro hva toglinje mellom Narvik og Tromsø ville hatt slags
-effekt på området der?&lt;/p&gt;
+&lt;p&gt;Ble tipset i dag om at et forslag om å stoppe forsøkene med
+elektronisk stemmegiving utenfor valglokaler er
+&lt;a href=&quot;http://www.stortinget.no/no/Saker-og-publikasjoner/Saker/Sak/?p=46616&quot;&gt;til
+behandling&lt;/a&gt; i Stortinget.
+&lt;a href=&quot;http://www.stortinget.no/Global/pdf/Representantforslag/2009-2010/dok8-200910-128.pdf&quot;&gt;Forslaget&lt;/a&gt;
+er fremmet av Erna Solberg, Michael Tetzschner og Trond Helleland.&lt;/p&gt;
+
+&lt;p&gt;Håper det får flertall.&lt;/p&gt;

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-               <title>KDM fail at boot with NVidia cards - and no one try to fix it?</title>
-               <link>http://people.skolelinux.org/pere/blog/KDM_fail_at_boot_with_NVidia_cards___and_no_one_try_to_fix_it_.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/KDM_fail_at_boot_with_NVidia_cards___and_no_one_try_to_fix_it_.html</guid>
-                <pubDate>Tue, 1 Jun 2010 17:05:00 +0200</pubDate>
+               <title>Broken hard link handling with sshfs</title>
+               <link>http://people.skolelinux.org/pere/blog/Broken_hard_link_handling_with_sshfs.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Broken_hard_link_handling_with_sshfs.html</guid>
+                <pubDate>Mon, 30 Aug 2010 19:30:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;It is strange to watch how a bug in Debian causing KDM to fail to
-start at boot when an NVidia video card is used is handled.  The
-problem seem to be that the nvidia X.org driver uses a long time to
-initialize, and this duration is longer than kdm is configured to
-wait.&lt;/p&gt;
-
-&lt;p&gt;I came across two bugs related to this issue,
-&lt;a href=&quot;http://bugs.debian.org/583312&quot;&gt;#583312&lt;/a&gt; initially filed
-against initscripts and passed on to nvidia-glx when it became obvious
-that the nvidia drivers were involved, and
-&lt;a href=&quot;http://bugs.debian.org/524751&quot;&gt;#524751&lt;/a&gt; initially filed against
-kdm and passed on to src:nvidia-graphics-drivers for unknown reasons.&lt;/p&gt;
-
-&lt;p&gt;To me, it seem that no-one is interested in actually solving the
-problem nvidia video card owners experience and make sure the Debian
-distribution work out of the box for these users.  The nvidia driver
-maintainers expect kdm to be set up to wait longer, while kdm expect
-the nvidia driver maintainers to fix the driver to start faster, and
-while they wait for each other I guess the users end up switching to a
-distribution that work for them.  I have no idea what the solution is,
-but I am pretty sure that waiting for each other is not it.&lt;/p&gt;
-
-&lt;p&gt;I wonder why we end up handling bugs this way.&lt;/p&gt;
+&lt;p&gt;Just got an email from Tobias Gruetzmacher as a followup on my
+&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Broken_umask_handling_with_sshfs.html&quot;&gt;previous
+post about sshfs&lt;/a&gt;.  He reported another problem with sshfs.  It
+fail to handle hard links properly.  A simple way to spot this is to
+look at the . and .. entries in the directory tree.  These should have
+a link count &gt;1, but on sshfs the count is 1.  I just tested to see
+what happen when trying to hardlink, and this fail as well:&lt;/p&gt;
+
+&lt;pre&gt;
+% ln foo bar
+ln: creating hard link `bar&#39; =&gt; `foo&#39;: Function not implemented
+%
+&lt;/pre&gt;
+
+&lt;p&gt;I have not yet found time to implement a test for this in my file
+system test code, but believe having working hard links is useful to
+avoid surprised unix programs.  Not as useful as working file locking
+and symlinks, which are required to get a working desktop, but useful
+nevertheless. :)&lt;/p&gt;
+
+&lt;p&gt;The latest version of the file system test code is available via
+git from
+&lt;a href=&quot;http://github.com/gebi/fs-test&quot;&gt;http://github.com/gebi/fs-test&lt;/a&gt;&lt;/p&gt;

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-               <title>Parallellized boot seem to hold up well in Debian/testing</title>
-               <link>http://people.skolelinux.org/pere/blog/Parallellized_boot_seem_to_hold_up_well_in_Debian_testing.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Parallellized_boot_seem_to_hold_up_well_in_Debian_testing.html</guid>
-                <pubDate>Thu, 27 May 2010 23:55:00 +0200</pubDate>
+               <title>Sikkerhetsteateret på flyplassene fortsetter</title>
+               <link>http://people.skolelinux.org/pere/blog/Sikkerhetsteateret_p___flyplassene_fortsetter.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Sikkerhetsteateret_p___flyplassene_fortsetter.html</guid>
+                <pubDate>Sat, 28 Aug 2010 10:40:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;A few days ago, parallel booting was enabled in Debian/testing.
-The feature seem to hold up pretty well, but three fairly serious
-issues are known and should be solved:
-
-&lt;p&gt;&lt;ul&gt;
-
-&lt;li&gt;The wicd package seen to
-&lt;a href=&quot;http://bugs.debian.org/508289&quot;&gt;break NFS mounting&lt;/a&gt; and
-&lt;a href=&quot;http://bugs.debian.org/581586&quot;&gt;network setup&lt;/a&gt; when
-parallel booting is enabled.  No idea why, but the wicd maintainer
-seem to be on the case.&lt;/li&gt;
-
-&lt;li&gt;The nvidia X driver seem to
-&lt;a href=&quot;http://bugs.debian.org/583312&quot;&gt;have a race condition&lt;/a&gt;
-triggered more easily when parallel booting is in effect.  The
-maintainer is on the case.&lt;/li&gt;
-
-&lt;li&gt;The sysv-rc package fail to properly enable dependency based boot
-sequencing (the shutdown is broken) when old file-rc users
-&lt;a href=&quot;http://bugs.debian.org/575080&quot;&gt;try to switch back&lt;/a&gt; to
-sysv-rc.  One way to solve it would be for file-rc to create
-/etc/init.d/.legacy-bootordering, and another is to try to make
-sysv-rc more robust.  Will investigate some more and probably upload a
-workaround in sysv-rc to help those trying to move from file-rc to
-sysv-rc get a working shutdown.&lt;/li&gt;
-
-&lt;/ul&gt;&lt;/p&gt;
-
-&lt;p&gt;All in all not many surprising issues, and all of them seem
-solvable before Squeeze is released.  In addition to these there are
-some packages with bugs in their dependencies and run level settings,
-which I expect will be fixed in a reasonable time span.&lt;/p&gt;
-
-&lt;p&gt;If you report any problems with dependencies in init.d scripts to
-the BTS, please usertag the report to get it to show up at
-&lt;a href=&quot;http://bugs.debian.org/cgi-bin/pkgreport.cgi?users=initscripts-ng-devel@lists.alioth.debian.org&quot;&gt;the
-list of usertagged bugs related to this&lt;/a&gt;.&lt;/p&gt;
-
-&lt;p&gt;Update: Correct bug number to file-rc issue.&lt;/p&gt;
+&lt;p&gt;Jeg skrev for et halvt år siden hvordan
+&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Sikkerhet__teater__og_hvordan_gj__re_verden_sikrere.html&quot;&gt;samfunnet
+kaster bort ressurser på sikkerhetstiltak som ikke fungerer&lt;/a&gt;.  Kom
+nettopp over en
+&lt;a href=&quot;http://www.askthepilot.com/essays-and-stories/terrorism-tweezers-and-terminal-madness-an-essay-on-security/&quot;&gt;historie
+fra en pilot fra USA&lt;/a&gt; som kommenterer det samme.  Jeg mistenker det
+kun er uvitenhet og autoritetstro som gjør at så få protesterer.  Har
+veldig sans for piloten omtalt i &lt;a
+href=&quot;http://www.aftenposten.no/nyheter/iriks/article2057501.ece&quot;&gt;Aftenposten&lt;/a&gt; 2007-10-23,
+og skulle ønske flere rettet oppmerksomhet mot problemet.  Det gir
+ikke meg trygghetsfølelse på flyplassene når jeg ser at
+flyplassadministrasjonen kaster bort folk, penger og tid på tull i
+stedet for ting som bidrar til reell økning av sikkerheten.  Det
+forteller meg jo at vurderingsevnen til de som burde bidra til økt
+sikkerhet er svært sviktende, noe som ikke taler godt for de andre
+tiltakene.&lt;/p&gt;
+
+&lt;p&gt;Mon tro hva som skjer hvis det fantes en enkel brosjyre å skrive ut
+fra Internet som forklarte hva som er galt med sikkerhetsopplegget på
+flyplassene, og folk skrev ut og la en bunke på flyplassene når de
+passerte.  Kanskje det ville fått flere til å få øynene opp for
+problemet.&lt;/p&gt;
+
+&lt;p&gt;Personlig synes jeg flyopplevelsen er blitt så avskyelig at jeg
+forsøker å klare meg med tog, bil og båt for å slippe ubehaget.  Det
+er dog noe vanskelig i det langstrakte Norge og for å kunne besøke de
+delene av verden jeg ønsker å nå.  Mistenker at flere har det slik, og
+at dette går ut over inntjeningen til flyselskapene.  Det er antagelig
+en god ting sett fra et miljøperspektiv, men det er en annen sak.&lt;/p&gt;

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-               <title>More flexible firmware handling in debian-installer</title>
-               <link>http://people.skolelinux.org/pere/blog/More_flexible_firmware_handling_in_debian_installer.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/More_flexible_firmware_handling_in_debian_installer.html</guid>
-                <pubDate>Sat, 22 May 2010 21:30:00 +0200</pubDate>
+               <title>Skolelinux i Osloskolen</title>
+               <link>http://people.skolelinux.org/pere/blog/Skolelinux_i_Osloskolen.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Skolelinux_i_Osloskolen.html</guid>
+                <pubDate>Thu, 26 Aug 2010 22:25:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;After a long break from debian-installer development, I finally
-found time today to return to the project.  Having to spend less time
-working dependency based boot in debian, as it is almost complete now,
-definitely helped freeing some time.&lt;/p&gt;
-
-&lt;p&gt;A while back, I ran into a problem while working on Debian Edu.  We
-include some firmware packages on the Debian Edu CDs, those needed to
-get disk and network controllers working.  Without having these
-firmware packages available during installation, it is impossible to
-install Debian Edu on the given machine, and because our target group
-are non-technical people, asking them to provide firmware packages on
-an external medium is a support pain.  Initially, I expected it to be
-enough to include the firmware packages on the CD to get
-debian-installer to find and use them.  This proved to be wrong.
-Next, I hoped it was enough to symlink the relevant firmware packages
-to some useful location on the CD (tried /cdrom/ and
-/cdrom/firmware/).  This also proved to not work, and at this point I
-found time to look at the debian-installer code to figure out what was
-going to work.&lt;/p&gt;
-
-&lt;p&gt;The firmware loading code is in the hw-detect package, and a closer
-look revealed that it would only look for firmware packages outside
-the installation media, so the CD was never checked for firmware
-packages.  It would only check USB sticks, floppies and other
-&quot;external&quot; media devices.  Today I changed it to also look in the
-/cdrom/firmware/ directory on the mounted CD or DVD, which should
-solve the problem I ran into with Debian edu.  I also changed it to
-look in /firmware/, to make sure the installer also find firmware
-provided in the initrd when booting the installer via PXE, to allow us
-to provide the same feature in the PXE setup included in Debian
-Edu.&lt;/p&gt;
-
-&lt;p&gt;To make sure firmware deb packages with a license questions are not
-activated without asking if the license is accepted, I extended
-hw-detect to look for preinst scripts in the firmware packages, and
-run these before activating the firmware during installation.  The
-license question is asked using debconf in the preinst, so this should
-solve the issue for the firmware packages I have looked at so far.&lt;/p&gt;
-
-&lt;p&gt;If you want to discuss the details of these features, please
-contact us on debian-boot@lists.debian.org.&lt;/p&gt;
+&lt;p&gt;Denne høsten skal endelig alle Osloskolene få mulighet til å bruke
+&lt;a href=&quot;http://www.skolelinux.org/&quot;&gt;Skolelinux&lt;/a&gt;.  Ny IT-løsning
+har vært rullet ut i noen måneder nå, og så vidt jeg fikk vite før
+sommeren skulle alle skoler ha nytt opplegg på plass før oppstart nå i
+høst.  På alle skolene skal en kunne velge ved installasjon om en skal
+ha Windows eller Skolelinux på maskinene, og en kan i tillegg
+PXE-boote maskinene over nett som tynne klienter eller diskløse
+arbeidsstasjoner. Jeg er spent på hvor mange skoler som velger å ta i
+bruk Skolelinux, og gleder meg til å se hvordan dette utvikler seg.
+Løsningen leveres av
+&lt;a href=&quot;http://www.logica.no/&quot;&gt;Logica&lt;/a&gt; med
+&lt;a href=&quot;http://www.slxdrift.no/&quot;&gt;Skolelinux Drift AS&lt;/a&gt; som
+underleverandør, og jeg har vært involvert i utviklingen av løsningen
+via Skolelinux Drift AS siden prosjektet starter.  Jeg synes det er
+fantastisk at Skolelinux er kommet så langt siden vi startet i 2001 at
+alle elevene i Osloskolene nå skal få mulighet til å bruke
+løsningen.  Jeg håper de vil sette pris på alle de
+&lt;a href=&quot;http://www.skolelinux.no/linux-signpost/&quot;&gt;fantastiske
+brukerprogrammene&lt;/a&gt; som er tilgjengelig i Skolelinux.&lt;/p&gt;

 </description>
        </item>
        
        <item>
 </description>
        </item>
        
        <item>

-               <title>Magnetstripeinnhold i billetter fra Flytoget og Hurtigruten</title>
-               <link>http://people.skolelinux.org/pere/blog/Magnetstripeinnhold_i_billetter_fra_Flytoget_og_Hurtigruten.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Magnetstripeinnhold_i_billetter_fra_Flytoget_og_Hurtigruten.html</guid>
-                <pubDate>Fri, 21 May 2010 16:00:00 +0200</pubDate>
+               <title>Broken umask handling with sshfs</title>
+               <link>http://people.skolelinux.org/pere/blog/Broken_umask_handling_with_sshfs.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Broken_umask_handling_with_sshfs.html</guid>
+                <pubDate>Thu, 26 Aug 2010 13:30:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;For en stund tilbake kjøpte jeg en magnetkortleser for å kunne
-titte på hva som er skrevet inn på magnetstripene til ulike kort.  Har
-ikke hatt tid til å analysere mange kort så langt, men tenkte jeg
-skulle dele innholdet på to kort med mine lesere.&lt;/p&gt;
-
-&lt;p&gt;For noen dager siden tok jeg flyet til Harstad og Hurtigruten til
-Bergen.  Flytoget fra Oslo S til flyplassen ga meg en billett med
-magnetstripe.  Påtrykket finner jeg følgende informasjon:&lt;/p&gt;
+&lt;p&gt;My file system sematics program
+&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Testing_if_a_file_system_can_be_used_for_home_directories___.html&quot;&gt;presented
+a few days ago&lt;/a&gt; is very useful to verify that a file system can
+work as a unix home directory,and today I had to extend it a bit.  I&#39;m
+looking into alternatives for home directory access here at the
+University of Oslo, and one of the options is sshfs.  My friend
+Finn-Arne mentioned a while back that they had used sshfs with Debian
+Edu, but stopped because of problems.  I asked today what the problems
+where, and he mentioned that sshfs failed to handle umask properly.
+Trying to detect the problem I wrote this addition to my fs testing
+script:&lt;/p&gt;

 
 &lt;pre&gt;
 
 &lt;pre&gt;

-Flytoget Airport Express Train
-
-Fra - Til        : Oslo Sentralstasjon
-Kategori         : Voksen
-Pris             : Nok 170,00
-Herav mva. 8,00% : NOK 12,59
-Betaling         : Kontant
-Til - Fra        : Oslo Lufthavn
-Utstedt:         : 08.05.10
-Gyldig Fra-Til   : 08.05.10-07.11.10
-Billetttype      : Enkeltbillett
-
-102-1015-100508-48382-01-08
+mode_t touch_get_mode(const char *name, mode_t mode) {
+  mode_t retval = 0;
+  int fd = open(name, O_RDWR|O_CREAT|O_LARGEFILE, mode);
+  if (-1 != fd) {
+    unlink(name);
+    struct stat statbuf;
+    if (-1 != fstat(fd, &amp;statbuf)) {
+      retval = statbuf.st_mode &amp; 0x1ff;
+    }
+    close(fd);
+  }
+  return retval;
+}
+
+/* Try to detect problem discovered using sshfs */
+int test_umask(void) {
+  printf(&quot;info: testing umask effect on file creation\n&quot;);
+
+  mode_t orig_umask = umask(000);
+  mode_t newmode;
+  if (0666 != (newmode = touch_get_mode(&quot;foobar&quot;, 0666))) {
+    printf(&quot;  error: Wrong file mode %o when creating using mode 666 and umask 000\n&quot;,
+           newmode);
+  }
+  umask(007);
+  if (0660 != (newmode = touch_get_mode(&quot;foobar&quot;, 0666))) {
+    printf(&quot;  error: Wrong file mode %o when creating using mode 666 and umask 007\n&quot;,
+           newmode);
+  }
+
+  umask (orig_umask);
+  return 0;
+}
+
+int main(int argc, char **argv) {
+  [...]
+  test_umask();
+  return 0;
+}

 &lt;/pre&gt;
 
 &lt;/pre&gt;
 

-&lt;p&gt;På selve magnetstripen er innholdet
-&lt;tt&gt;;E?+900120011=23250996541068112619257138248441708433322932704083389389062603279671261502492655?&lt;/tt&gt;.
-Aner ikke hva innholdet representerer, og det er lite overlapp mellom
-det jeg ser trykket på billetten og det jeg ser av tegn i
-magnetstripen.  Håper det betyr at de bruker kryptografiske metoder
-for å gjøre det vanskelig å forfalske billetter.&lt;/p&gt;
+&lt;p&gt;Sure enough.  On NFS to a netapp, I get this result:&lt;/p&gt;

 
 

-&lt;p&gt;Den andre billetten er fra Hurtigruten, der jeg mistenker at
-strekkoden på fronten er mer brukt enn magnetstripen (det var i hvert
-fall den biten vi stakk inn i dørlåsen).&lt;/p&gt;
+&lt;pre&gt;
+Testing POSIX/Unix sematics on file system
+info: testing symlink creation
+info: testing subdirectory creation
+info: testing fcntl locking
+  Read-locking 1 byte from 1073741824
+  Read-locking 510 byte from 1073741826
+  Unlocking 1 byte from 1073741824
+  Write-locking 1 byte from 1073741824
+  Write-locking 510 byte from 1073741826
+  Unlocking 2 byte from 1073741824
+info: testing umask effect on file creation
+&lt;/pre&gt;

 
 

-&lt;p&gt;Påtrykket forsiden er følgende:&lt;/p&gt;
+&lt;p&gt;When mounting the same directory using sshfs, I get this
+result:&lt;/p&gt;

 
 &lt;pre&gt;
 
 &lt;pre&gt;

-Romnummer 727
-Hurtigruten
-Midnatsol
-Reinholdtsen
-Petter
-Bookingno: SAX69   0742193
-Harstad-Bergen
-Dep: 09.05.2010 Arr: 12.05.2010
-Lugar fra Risøyhamn
-Kost: FRO=4
+Testing POSIX/Unix sematics on file system
+info: testing symlink creation
+info: testing subdirectory creation
+info: testing fcntl locking
+  Read-locking 1 byte from 1073741824
+  Read-locking 510 byte from 1073741826
+  Unlocking 1 byte from 1073741824
+  Write-locking 1 byte from 1073741824
+  Write-locking 510 byte from 1073741826
+  Unlocking 2 byte from 1073741824
+info: testing umask effect on file creation
+  error: Wrong file mode 644 when creating using mode 666 and umask 000
+  error: Wrong file mode 640 when creating using mode 666 and umask 007

 &lt;/pre&gt;
 
 &lt;/pre&gt;
 

-&lt;p&gt;På selve magnetstripen er innholdet
-&lt;tt&gt;;1316010007421930=00000000000000000000?+E?&lt;/tt&gt;.  Heller ikke her
-ser jeg mye korrespondanse mellom påtrykk og magnetstripe.&lt;/p&gt;
+&lt;p&gt;So, I can conclude that sshfs is better than smb to a Netapp or a
+Windows server, but not good enough to be used as a home
+directory.&lt;/p&gt;
+
+&lt;p&gt;Update 2010-08-26: Reported the issue in
+&lt;a href=&quot;http://bugs.debian.org/594498&quot;&gt;BTS report #594498&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;Update 2010-08-27: Michael Gebetsroither report that he found the
+script so useful that he created a GIT repository and stored it in
+&lt;a href=&quot;http://github.com/gebi/fs-test&quot;&gt;http://github.com/gebi/fs-test&lt;/a&gt;.&lt;/p&gt;

 </description>
        </item>
        
        <item>
 </description>
        </item>
        
        <item>

-               <title>Pieces of the roaming laptop puzzle in Debian</title>
-               <link>http://people.skolelinux.org/pere/blog/Pieces_of_the_roaming_laptop_puzzle_in_Debian.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Pieces_of_the_roaming_laptop_puzzle_in_Debian.html</guid>
-                <pubDate>Wed, 19 May 2010 19:00:00 +0200</pubDate>
+               <title>Elektronisk stemmegiving er ikke til å stole på - heller ikke i Norge</title>
+               <link>http://people.skolelinux.org/pere/blog/Elektronisk_stemmegiving_er_ikke_til____stole_p_____heller_ikke_i_Norge.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Elektronisk_stemmegiving_er_ikke_til____stole_p_____heller_ikke_i_Norge.html</guid>
+                <pubDate>Mon, 23 Aug 2010 19:30:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;Today, the last piece of the puzzle for roaming laptops in Debian
-Edu finally entered the Debian archive.  Today, the new
-&lt;a href=&quot;http://packages.qa.debian.org/libp/libpam-mklocaluser.html&quot;&gt;libpam-mklocaluser&lt;/a&gt;
-package was accepted.  Two days ago, two other pieces was accepted
-into unstable.  The
-&lt;a href=&quot;http://packages.qa.debian.org/p/pam-python.html&quot;&gt;pam-python&lt;/a&gt;
-package needed by libpam-mklocaluser, and the
-&lt;a href=&quot;http://packages.qa.debian.org/s/sssd.html&quot;&gt;sssd&lt;/a&gt; package
-passed NEW on Monday.  In addition, the
-&lt;a href=&quot;http://packages.qa.debian.org/libp/libpam-ccreds.html&quot;&gt;libpam-ccreds&lt;/a&gt;
-package we need is in experimental (version 10-4) since Saturday, and
-hopefully will be moved to unstable soon.&lt;/p&gt;
-
-&lt;p&gt;This collection of packages allow for two different setups for
-roaming laptops.  The traditional setup would be using libpam-ccreds,
-nscd and libpam-mklocaluser with LDAP or Kerberos authentication,
-which should work out of the box if the configuration changes proposed
-for nscd in &lt;a href=&quot;http://bugs.debian.org/485282&quot;&gt;BTS report
-#485282&lt;/a&gt; is implemented.  The alternative setup is to use sssd with
-libpam-mklocaluser to connect to LDAP or Kerberos and let sssd take
-care of the caching of passwords and group information.&lt;/p&gt;
-
-&lt;p&gt;I have so far been unable to get sssd to work with the LDAP server
-at the University, but suspect the issue is some SSL/GnuTLS related
-problem with the server certificate.  I plan to update the Debian
-package to version 1.2, which is scheduled for next week, and hope to
-find time to make sure the next release will include both the
-Debian/Ubuntu specific patches.  Upstream is friendly and responsive,
-and I am sure we will find a good solution.&lt;/p&gt;
-
-&lt;p&gt;The idea is to set up the roaming laptops to authenticate using
-LDAP or Kerberos and create a local user with home directory in /home/
-when a usre in LDAP logs in via KDM or GDM for the first time, and
-cache the password for offline checking, as well as caching group
-memberhips and other relevant LDAP information.  The
-libpam-mklocaluser package was created to make sure the local home
-directory is in /home/, instead of /site/server/directory/ which would
-be the home directory if pam_mkhomedir was used.  To avoid confusion
-with support requests and configuration, we do not want local laptops
-to have users in a path that is used for the same users home directory
-on the home directory servers.&lt;/p&gt;
-
-&lt;p&gt;One annoying problem with gdm is that it do not show the PAM
-message passed to the user from libpam-mklocaluser when the local user
-is created.  Instead gdm simply reject the login with some generic
-message.  The message is shown in kdm, ssh and login, so I guess it is
-a bug in gdm.  Have not investigated if there is some other message
-type that can be used instead to get gdm to also show the message.&lt;/p&gt;
-
-&lt;p&gt;If you want to help out with implementing this for Debian Edu,
-please contact us on debian-edu@lists.debian.org.&lt;/p&gt;
+&lt;p&gt;I Norge pågår en prosess for å
+&lt;a href=&quot;http://www.e-valg.dep.no/&quot;&gt;innføre elektronisk
+stemmegiving&lt;/a&gt; ved kommune- og stortingsvalg.  Dette skal
+introduseres i 2011.  Det er all grunn til å tro at valg i Norge ikke
+vil være til å stole på hvis dette blir gjennomført.  Da det hele var
+oppe til høring i 2006 forfattet jeg
+&lt;a href=&quot;http://www.nuug.no/dokumenter/valg-horing-2006-09.pdf&quot;&gt;en
+høringsuttalelse fra NUUG&lt;/a&gt; (og EFN som hengte seg på) som skisserte
+hvilke punkter som må oppfylles for at en skal kunne stole på et valg,
+og elektronisk stemmegiving mangler flere av disse.  Elektronisk
+stemmegiving er for alle praktiske formål å putte ens stemme i en sort
+boks under andres kontroll, og satse på at de som har kontroll med
+boksen er til å stole på - uten at en har mulighet til å verifisere
+dette selv.  Det er ikke slik en gjennomfører demokratiske valg.&lt;/p&gt;
+
+&lt;p&gt;Da problemet er fundamentalt med hvordan elektronisk stemmegiving
+må fungere for at også ikke-krypografer skal kunne delta, har det vært
+mange rapporter om hvordan elektronisk stemmegiving har sviktet i land
+etter land.  En
+&lt;a href=&quot;http://wiki.nuug.no/uttalelser/2006-elektronisk-stemmegiving&quot;&gt;liten
+samling referanser&lt;/a&gt; finnes på NUUGs wiki.  Den siste er fra India,
+der valgkomisjonen har valgt
+&lt;a href=&quot;http://www.freedom-to-tinker.com/blog/jhalderm/electronic-voting-researcher-arrested-over-anonymous-source&quot;&gt;å
+pusse politiet på en forsker&lt;/a&gt; som har dokumentert svakheter i
+valgsystemet.&lt;/p&gt;
+
+&lt;p&gt;Her i Norge har en valgt en annen tilnærming, der en forsøker seg
+med teknobabbel for å få befolkningen til å tro at dette skal bli
+sikkert.  Husk, elektronisk stemmegiving underminerer de demokratiske
+valgene i Norge, og bør ikke innføres.&lt;/p&gt;
+
+&lt;p&gt;Den offentlige diskusjonen blir litt vanskelig av at media har
+valgt å kalle dette &quot;evalg&quot;, som kan sies å både gjelde elektronisk
+opptelling av valget som Norge har gjort siden 60-tallet og som er en
+svært god ide, og elektronisk opptelling som er en svært dårlig ide.
+Diskusjonen gir ikke mening hvis en skal diskutere om en er for eller
+mot &quot;evalg&quot;, og jeg forsøker derfor å være klar på at jeg snakker om
+elektronisk stemmegiving og unngå begrepet &quot;evalg&quot;.&lt;/p&gt;

 </description>
        </item>
        
        <item>
 </description>
        </item>
        
        <item>

-               <title>Parallellized boot is now the default in Debian/unstable</title>
-               <link>http://people.skolelinux.org/pere/blog/Parallellized_boot_is_now_the_default_in_Debian_unstable.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Parallellized_boot_is_now_the_default_in_Debian_unstable.html</guid>
-                <pubDate>Fri, 14 May 2010 22:40:00 +0200</pubDate>
+               <title>Robot, reis deg...</title>
+               <link>http://people.skolelinux.org/pere/blog/Robot__reis_deg___.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Robot__reis_deg___.html</guid>
+                <pubDate>Sat, 21 Aug 2010 22:10:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;Since this evening, parallel booting is the default in
-Debian/unstable for machines using dependency based boot sequencing.
-Apparently the testing of concurrent booting has been wider than
-expected, if I am to believe the
-&lt;a href=&quot;http://lists.debian.org/debian-devel/2010/05/msg00122.html&quot;&gt;input
-on debian-devel@&lt;/a&gt;, and I concluded a few days ago to move forward
-with the feature this weekend, to give us some time to detect any
-remaining problems before Squeeze is frozen.  If serious problems are
-detected, it is simple to change the default back to sequential boot.
-The upload of the new sysvinit package also activate a new upstream
-version.&lt;/p&gt;
-
-More information about
-&lt;a href=&quot;http://wiki.debian.org/LSBInitScripts/DependencyBasedBoot&quot;&gt;dependency
-based boot sequencing&lt;/a&gt; is available from the Debian wiki.  It is
-currently possible to disable parallel booting when one run into
-problems caused by it, by adding this line to /etc/default/rcS:&lt;/p&gt;
-
-&lt;blockquote&gt;&lt;pre&gt;
-CONCURRENCY=none
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;p&gt;If you report any problems with dependencies in init.d scripts to
-the BTS, please usertag the report to get it to show up at
-&lt;a href=&quot;http://bugs.debian.org/cgi-bin/pkgreport.cgi?users=initscripts-ng-devel@lists.alioth.debian.org&quot;&gt;the
-list of usertagged bugs related to this&lt;/a&gt;.&lt;/p&gt;
+&lt;p&gt;I dag fikk jeg endelig tittet litt på mine nyinnkjøpte roboter, og
+har brukt noen timer til å google etter interessante referanser og
+aktuell kildekode for bruk på Linux.  Det mest lovende så langt er
+&lt;a href=&quot;http://ispykee.toyz.org/&quot;&gt;ispykee&lt;/a&gt;, som har en
+BSD-lisensiert linux-daemon som står som mellomledd mellom roboter på
+lokalnettet og en sentral tjeneste der en iPhone kan koble seg opp for
+å fjernstyre roboten.  Linux-daemonen implementerer deler av
+protokollen som roboten forstår.  Etter å ha knotet litt med å oppnå
+kontakt med roboten (den oppretter et eget ad-hoc wifi-nett, så jeg
+måtte gå av mitt vanlige nett for å få kontakt), og kommet frem til at
+den lytter på IP-port 9000 og 9001, gikk jeg i gang med å finne ut
+hvordan jeg kunne snakke med roboten vha. disse portene.  Robotbiten
+av protokollen er publisert av produsenten med GPL-lisens, slik at det
+er mulig å se hvordan protokollen fungerer.  Det finnes en java-klient
+for Android som så ganske snasen ut, men fant ingen kildekode for
+denne.  Derimot hadde iphone-løsningen kildekode, så jeg tok
+utgangspunkt i den.&lt;/p&gt;
+
+&lt;p&gt;Daemonen ville i utgangspunktet forsøke å kontakte den sentrale
+tjenesten som iphone-programmet kobler seg til.  Jeg skrev dette om
+til i stedet å sette opp en nettverkstjeneste på min lokale maskin,
+som jeg kan koble meg opp til med telnet og gi kommandoer til roboten
+(act, forward, right, left, etc).  Det involverte i praksis å bytte ut
+socket()/connect() med socket()/bind()/listen()/accept() for å gjøre
+klienten om til en tjener.&lt;/p&gt;
+
+&lt;p&gt;Mens jeg har forsøkt å få roboten til å bevege seg har min samboer
+skrudd sammen resten av roboten for å få montert kamera og plastpynten
+(armer, plastfiber for lys).  Nå er det hele montert, og roboten er
+klar til bruk.  Må få flyttet den over til mitt vanlige trådløsnett
+før det blir praktisk, men de bitene av protokollen er ikke
+implementert i ispykee-daemonen, så der må jeg enten få tak i en mac
+eller en windows-maskin, eller implementere det selv.&lt;/p&gt;
+
+&lt;p&gt;Vi var tre som kjøpte slike roboter, og vi har blitt enige om å
+samle notater og referanser på &lt;a
+href=&quot;http://wiki.nuug.no/grupper/robot/&quot;&gt;NUUGs wiki&lt;/a&gt;.  Ta en titt
+der hvis du er nysgjerrig.&lt;/p&gt;

 </description>
        </item>
        
        <item>
 </description>
        </item>
        
        <item>

-               <title>Sitesummary tip: Listing MAC address of all clients</title>
-               <link>http://people.skolelinux.org/pere/blog/Sitesummary_tip__Listing_MAC_address_of_all_clients.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Sitesummary_tip__Listing_MAC_address_of_all_clients.html</guid>
-                <pubDate>Fri, 14 May 2010 21:10:00 +0200</pubDate>
+               <title>2 Spykee-roboter i hus, nå skal det lekes</title>
+               <link>http://people.skolelinux.org/pere/blog/2_Spykee_roboter_i_hus__n___skal_det_lekes.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/2_Spykee_roboter_i_hus__n___skal_det_lekes.html</guid>
+                <pubDate>Wed, 18 Aug 2010 13:30:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;In the recent Debian Edu versions, the
-&lt;a href=&quot;http://wiki.debian.org/DebianEdu/HowTo/SiteSummary&quot;&gt;sitesummary
-system&lt;/a&gt; is used to keep track of the machines in the school
-network.  Each machine will automatically report its status to the
-central server after boot and once per night.  The network setup is
-also reported, and using this information it is possible to get the
-MAC address of all network interfaces in the machines.  This is useful
-to update the DHCP configuration.&lt;/p&gt;
-
-&lt;p&gt;To give some idea how to use sitesummary, here is a one-liner to
-ist all MAC addresses of all machines reporting to sitesummary.  Run
-this on the collector host:&lt;/p&gt;
-
-&lt;blockquote&gt;&lt;pre&gt;
-perl -MSiteSummary -e &#39;for_all_hosts(sub { print join(&quot; &quot;, get_macaddresses(shift)), &quot;\n&quot;; });&#39;
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;p&gt;This will list all MAC addresses assosiated with all machine, one
-line per machine and with space between the MAC addresses.&lt;/p&gt;
-
-&lt;p&gt;To allow system administrators easier job at adding static DHCP
-addresses for hosts, it would be possible to extend this to fetch
-machine information from sitesummary and update the DHCP and DNS
-tables in LDAP using this information.  Such tool is unfortunately not
-written yet.&lt;/p&gt;
+&lt;p&gt;Jeg kjøpte nettopp to
+&lt;a href=&quot;http://www.spykee-robot.com/&quot;&gt;Spykee&lt;/a&gt;-roboter, for test og
+leking.  Kjøpte to da det var så billige, og gir meg mulighet til å
+eksperimentere uten å være veldig redd for å ødelegge alt ved å bytte
+ut firmware og slikt.  Oppdaget at lekebutikken på Bryn senter hadde
+en liten stabel på lager som de ikke hadde klart å selge ut etter
+fjorårets juleinnkjøp, og var villig til å selge for en femtedel av
+vanlig pris.  Jeg, Ronny og Jarle har skaffet oss restbeholdningen, og
+det blir morsomt å se hva vi får ut av dette.&lt;/p&gt;
+
+&lt;p&gt;Roboten har belter styrt av to motorer, kamera, høytaler, mikrofon
+og wifi-tilkobling.  Det hele styrt av en GPL-lisensiert databoks som
+jeg mistenker kjører linux.  Firmware-kildekoden ble visst publisert i
+mai.  Eneste utfordringen er at kontroller-programvaren kun finnes til
+Windows, men det må en kunne jobbe seg rundt når vi har kildekoden til
+firmwaren. :)&lt;/p&gt;
+
+&lt;ul&gt;
+&lt;li&gt;&lt;a href=&quot;http://en.wikipedia.org/wiki/Spykee&quot;&gt;Wikipedia-oppføring&lt;/a&gt;&lt;/li&gt;
+&lt;li&gt;&lt;a href=http://www.spykeeworld.com/spykee/US/freeSoftware.html&quot;&gt;Nedlasting av firmware-kilden&lt;/a&gt;&lt;/li&gt;
+&lt;li&gt;&lt;a href=&quot;http://wiki.nuug.no/grupper/robot&quot;&gt;prosjektwiki hos NUUG&lt;/a&gt;&lt;/li&gt;
+&lt;/ul&gt;

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