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-               <title>How to talk with your loved ones in private</title>
-               <link>http://people.skolelinux.org/pere/blog/How_to_talk_with_your_loved_ones_in_private.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/How_to_talk_with_your_loved_ones_in_private.html</guid>
-                <pubDate>Mon, 7 Nov 2016 10:25:00 +0100</pubDate>
-               <description>&lt;p&gt;A few days ago I ran a very biased and informal survey to get an
-idea about what options are being used to communicate with end to end
-encryption with friends and family.  I explicitly asked people not to
-list options only used in a work setting.  The background is the
-uneasy feeling I get when using Signal, a feeling shared by others as
-a blog post from Sander Venima about
-&lt;a href=&quot;https://sandervenema.ch/2016/11/why-i-wont-recommend-signal-anymore/&quot;&gt;why
-he do not recommend Signal anymore&lt;/a&gt; (with
-&lt;a href=&quot;https://news.ycombinator.com/item?id=12883410&quot;&gt;feedback from
-the Signal author available from ycombinator&lt;/a&gt;).  I wanted an
-overview of the options being used, and hope to include those options
-in a less biased survey later on.  So far I have not taken the time to
-look into the individual proposed systems.  They range from text
-sharing web pages, via file sharing and email to instant messaging,
-VOIP and video conferencing.  For those considering which system to
-use, it is also useful to have a look at
-&lt;a href=&quot;https://www.eff.org/secure-messaging-scorecard&quot;&gt;the EFF Secure
-messaging scorecard&lt;/a&gt; which is slightly out of date but still
-provide valuable information.&lt;/p&gt;
-
-&lt;p&gt;So, on to the list.  There were some used by many, some used by a
-few, some rarely used ones and a few mentioned but without anyone
-claiming to use them.  Notice the grouping is in realty quite random
-given the biased self selected set of participants.  First the ones
-used by many:&lt;/p&gt;
-
-&lt;ul&gt;
-
-&lt;li&gt;&lt;a href=&quot;https://whispersystems.org/&quot;&gt;Signal&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;Email w/&lt;a href=&quot;http://openpgp.org/&quot;&gt;OpenPGP&lt;/a&gt; (Enigmail, GPGSuite,etc)&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://www.whatsapp.com/&quot;&gt;Whatsapp&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;IRC w/&lt;a href=&quot;https://otr.cypherpunks.ca/&quot;&gt;OTR&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;XMPP w/&lt;a href=&quot;https://otr.cypherpunks.ca/&quot;&gt;OTR&lt;/a&gt;&lt;/li&gt;
-
-&lt;/ul&gt;
-
-&lt;p&gt;Then the ones used by a few.&lt;/p&gt;
-
-&lt;ul&gt;
-
-&lt;li&gt;&lt;a href=&quot;https://wiki.mumble.info/wiki/Main_Page&quot;&gt;Mumble&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;iMessage (included in iOS from Apple)&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://telegram.org/&quot;&gt;Telegram&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://jitsi.org/&quot;&gt;Jitsi&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://keybase.io/download&quot;&gt;Keybase file&lt;/a&gt;&lt;/li&gt;
-
-&lt;/ul&gt;
-
-&lt;p&gt;Then the ones used by even fewer people&lt;/p&gt;
-
-&lt;ul&gt;
-
-&lt;li&gt;&lt;a href=&quot;https://ring.cx/&quot;&gt;Ring&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://bitmessage.org/&quot;&gt;Bitmessage&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://wire.com/&quot;&gt;Wire&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;VoIP w/&lt;a href=&quot;https://en.wikipedia.org/wiki/ZRTP&quot;&gt;ZRTP&lt;/a&gt; or controlled &lt;a href=&quot;https://en.wikipedia.org/wiki/Secure_Real-time_Transport_Protocol&quot;&gt;SRTP&lt;/a&gt; (e.g using &lt;a href=&quot;https://en.wikipedia.org/wiki/CSipSimple&quot;&gt;CSipSimple&lt;/a&gt;, &lt;a href=&quot;https://en.wikipedia.org/wiki/Linphone&quot;&gt;Linphone&lt;/a&gt;)&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://matrix.org/&quot;&gt;Matrix&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://kontalk.org/&quot;&gt;Kontalk&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://0bin.net/&quot;&gt;0bin&lt;/a&gt; (encrypted pastebin)&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://appear.in&quot;&gt;Appear.in&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://riot.im/&quot;&gt;riot&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://www.wickr.com/&quot;&gt;Wickr Me&lt;/a&gt;&lt;/li&gt;
-
-&lt;/ul&gt;
-
-&lt;p&gt;And finally the ones mentioned by not marked as used by
-anyone. This might be a mistake, perhaps the person adding the entry
-forgot to flag it as used?&lt;/p&gt;
-
-&lt;ul&gt;
-
-&lt;li&gt;Email w/Certificates &lt;a href=&quot;https://en.wikipedia.org/wiki/S/MIME&quot;&gt;S/MIME&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://www.crypho.com/&quot;&gt;Crypho&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://cryptpad.fr/&quot;&gt;CryptPad&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;https://github.com/ricochet-im/ricochet&quot;&gt;ricochet&lt;/a&gt;&lt;/li&gt;
-
-&lt;/ul&gt;
-
-&lt;p&gt;Given the network effect it seem obvious to me that we as a society
-have been divided and conquered by those interested in keeping
-encrypted and secure communication away from the masses.  The
-finishing remarks &lt;a href=&quot;https://vimeo.com/97505679&quot;&gt;from Aral Balkan
-in his talk &quot;Free is a lie&quot;&lt;/a&gt; about the usability of free software
-really come into effect when you want to communicate in private with
-your friends and family.  We can not expect them to allow the
-usability of communication tool to block their ability to talk to
-their loved ones.&lt;/p&gt;
-
-&lt;p&gt;Note for example the option IRC w/OTR.  Most IRC clients do not
-have OTR support, so in most cases OTR would not be an option, even if
-you wanted to.  In my personal experience, about 1 in 20 I talk to
-have a IRC client with OTR.  For private communication to really be
-available, most people to talk to must have the option in their
-currently used client.  I can not simply ask my family to install an
-IRC client.  I need to guide them through a technical multi-step
-process of adding extensions to the client to get them going.  This is
-a non-starter for most.&lt;/p&gt;
-
-&lt;p&gt;I would like to be able to do video phone calls, audio phone calls,
-exchange instant messages and share files with my loved ones, without
-being forced to share with people I do not know.  I do not want to
-share the content of the conversations, and I do not want to share who
-I communicate with or the fact that I communicate with someone.
-Without all these factors in place, my private life is being more or
-less invaded.&lt;/p&gt;
+               <title>Retten til kontant betaling er en rettighet som må brukes for å beholdes</title>
+               <link>http://people.skolelinux.org/pere/blog/Retten_til_kontant_betaling_er_en_rettighet_som_m__brukes_for___beholdes.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Retten_til_kontant_betaling_er_en_rettighet_som_m__brukes_for___beholdes.html</guid>
+                <pubDate>Tue, 11 Dec 2018 10:00:00 +0100</pubDate>
+               <description>&lt;p&gt;&lt;a href=&quot;https://www.fn.no/Om-FN/Avtaler/Menneskerettigheter/FNs-verdenserklaering-om-menneskerettigheter&quot;&gt;FNs
+menneskerettighetserklæring&lt;/a&gt; artikkel 13 første punkt lyder som
+følger:&lt;/p&gt;
+
+&lt;p&gt;&lt;blockquote&gt;
+Enhver har rett til å bevege seg fritt og til fritt å velge
+oppholdssted innenfor en stats grenser.
+&lt;/blockquote&gt;&lt;/p&gt;
+
+&lt;p&gt;Det er altså en menneskerett å kunne bevege seg fritt i landet.
+For å bevege seg fritt i landet, så må en kunne bevege seg uten å bli
+sporet.  Det vil i dagens samfunn innebære å bevege seg uten å legge
+igjen digitale spor og uten å være radiomerket.  Hvis en vet at ens
+bevegelser, hvor en befinner seg når, og hvem som befinner seg i
+nærheten, blir samlet inn og gjort tilgjengelig for fremmede, det være
+seg myndighetene eller private organisasjoner, så kan en ikke lenger
+bevege seg fritt.  Dette gjør at det er en forutsetning for å ha glede
+av retten til å bevege seg fritt i landet at en motstår fristelsen til
+å legge igjen digitale spor når en betaler for seg.  Rettigheter som
+ikke blir brukt, blit fjernet.  Den eneste måten i dag å unngå å legge
+igjen digitale spor når en betaler for seg, er å betale med kontanter,
+samt takke nei til å legge igjen navn og adresse (slik f.eks. Elkjøp
+ber om &amp;mdash; jeg sier de kan legge inn &#39;anonym anonym&#39; når
+datasystemet deres trenger et navn).  Personlig bruker jeg derfor
+konsekvent kontant betaling når jeg beveger meg rundt, for å bidra med
+mitt for å forsvare menneskerettighetene i Norge.  Kanskje noe også
+for deg?  Merk at det ikke er tilstrekkelig for å unngå sporing å
+betale med kontanter, men det er et lite steg i riktig retning.&lt;/p&gt;
+
+&lt;p&gt;Det er flere andre argumenter i tillegg til
+menneskerettighetsargumentet for å bruke kontanter.  I går hadde
+Dagbladet en utmerket kommentar av sin journalist John Olav Egeland om
+hvilket
+&lt;a href=&quot;https://www.dagbladet.no/kultur/kontantlost-diktatur/70543434&quot;&gt;kontantløst
+diktatur&lt;/a&gt; som venter oss hvis mange nok slutter å insistere på å
+betale med kontanter.  Jeg anbefaler deg å lese den.&lt;/p&gt;
+
+&lt;p&gt;Som vanlig, hvis du bruker Bitcoin og ønsker å vise din støtte til
+det jeg driver med, setter jeg pris på om du sender Bitcoin-donasjoner
+til min adresse
+&lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.
+Merk, betaling med bitcoin er ikke anonymt. :)&lt;/p&gt;

 </description>
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-               <title>My own self balancing Lego Segway</title>
-               <link>http://people.skolelinux.org/pere/blog/My_own_self_balancing_Lego_Segway.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/My_own_self_balancing_Lego_Segway.html</guid>
-                <pubDate>Fri, 4 Nov 2016 10:15:00 +0100</pubDate>
-               <description>&lt;p&gt;A while back I received a Gyro sensor for the NXT
-&lt;a href=&quot;mindstorms.lego.com&quot;&gt;Mindstorms&lt;/a&gt; controller as a birthday
-present.  It had been on my wishlist for a while, because I wanted to
-build a Segway like balancing lego robot.  I had already built
-&lt;a href=&quot;http://www.nxtprograms.com/NXT2/segway/&quot;&gt;a simple balancing
-robot&lt;/a&gt; with the kids, using the light/color sensor included in the
-NXT kit as the balance sensor, but it was not working very well.  It
-could balance for a while, but was very sensitive to the light
-condition in the room and the reflective properties of the surface and
-would fall over after a short while.  I wanted something more robust,
-and had
-&lt;a href=&quot;https://www.hitechnic.com/cgi-bin/commerce.cgi?preadd=action&amp;key=NGY1044&quot;&gt;the
-gyro sensor from HiTechnic&lt;/a&gt; I believed would solve it on my
-wishlist for some years before it suddenly showed up as a gift from my
-loved ones. :)&lt;/p&gt;
-
-&lt;p&gt;Unfortunately I have not had time to sit down and play with it
-since then.  But that changed some days ago, when I was searching for
-lego segway information and came across a recipe from HiTechnic for
-building
-&lt;a href=&quot;http://www.hitechnic.com/blog/gyro-sensor/htway/&quot;&gt;the
-HTWay&lt;/a&gt;, a segway like balancing robot.  Build instructions and
-&lt;a href=&quot;https://www.hitechnic.com/upload/786-HTWayC.nxc&quot;&gt;source
-code&lt;/a&gt; was included, so it was just a question of putting it all
-together.  And thanks to the great work of many Debian developers, the
-compiler needed to build the source for the NXT is already included in
-Debian, so I was read to go in less than an hour.  The resulting robot
-do not look very impressive in its simplicity:&lt;/p&gt;
-
-&lt;p align=&quot;center&quot;&gt;&lt;img width=&quot;70%&quot; src=&quot;http://people.skolelinux.org/pere/blog/images/2016-11-04-lego-htway-robot.jpeg&quot;&gt;&lt;/p&gt;
-
-&lt;p&gt;Because I lack the infrared sensor used to control the robot in the
-design from HiTechnic, I had to comment out the last task
-(taskControl).  I simply placed /* and */ around it get the program
-working without that sensor present.  Now it balances just fine until
-the battery status run low:&lt;/p&gt;
-
-&lt;p align=&quot;center&quot;&gt;&lt;video width=&quot;70%&quot; controls=&quot;true&quot;&gt;
-   &lt;source src=&quot;http://people.skolelinux.org/pere/blog/images/2016-11-04-lego-htway-balancing.ogv&quot; type=&quot;video/ogg&quot;&gt;
-&lt;/video&gt;&lt;/p&gt;
-
-&lt;p&gt;Now we would like to teach it how to follow a line and take remote
-control instructions using the included Bluetooth receiver in the NXT.&lt;/p&gt;
-
-&lt;p&gt;If you, like me, love LEGO and want to make sure we find the tools
-they need to work with LEGO in Debian and all our derivative
-distributions like Ubuntu, check out
-&lt;a href=&quot;http://wiki.debian.org/LegoDesigners&quot;&gt;the LEGO designers
-project page&lt;/a&gt; and join the Debian LEGO team.  Personally I own a
-RCX and NXT controller (no EV3), and would like to make sure the
-Debian tools needed to program the systems I own work as they
-should.&lt;/p&gt;
+               <title>Why is your site not using Content Security Policy / CSP?</title>
+               <link>http://people.skolelinux.org/pere/blog/Why_is_your_site_not_using_Content_Security_Policy___CSP_.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Why_is_your_site_not_using_Content_Security_Policy___CSP_.html</guid>
+                <pubDate>Sun, 9 Dec 2018 15:00:00 +0100</pubDate>
+               <description>&lt;p&gt;Yesterday, I had the pleasure of watching on Frikanalen the OWASP
+talk by Scott Helme titled
+&quot;&lt;a href=&quot;https://frikanalen.no/video/626080/&quot;&gt;What We’ve Learned From
+Billions of Security Reports&lt;/a&gt;&quot;.  I had not heard of the
+&lt;a href=&quot;https://en.wikipedia.org/wiki/Content_Security_Policy&quot;&gt;Content
+Security Policy standard&lt;/a&gt; nor its ability to &quot;call home&quot; when a
+browser detect a policy breach (I do not follow web page design
+development much these days), and found the talk very illuminating.&lt;/p&gt;
+
+&lt;p&gt;The mechanism allow a web site owner to use HTTP headers to tell
+visitors web browser which sources (internal and external) are allowed to
+be used on the web site.  Thus it become possible to enforce a &quot;only
+local content&quot; policy despite web designers urge to fetch programs
+from random sites on the Internet, like the one
+&lt;a href=&quot;https://securityaffairs.co/wordpress/68966/hacking/browsealoud-plugin-hack.html&quot;&gt;enabling
+the attack&lt;/a&gt; reported by Scott Helme earlier this year.&lt;/p&gt;
+
+&lt;p&gt;Using CSP seem like an obvious thing for a site admin to implement
+to take some control over the information leak that occur when
+external sources are used to render web pages, it is a mystery more
+sites are not using CSP?  It is being
+&lt;a href=&quot;https://www.w3.org/TR/CSP/&quot;&gt;standardized under W3C&lt;/a&gt; these
+days, and is supposed by most web browsers&lt;/p&gt;
+
+&lt;p&gt;I managed to find &lt;a href=&quot;https://github.com/mozilla/django-csp&quot;&gt;a
+Django middleware for implementing CSP&lt;/a&gt; and was happy to discover
+it was already in Debian.  I plan to use it to add CSP support to the
+Frikanalen web site soon.&lt;/p&gt;
+
+&lt;p&gt;As usual, if you use Bitcoin and want to show your support of my
+activities, please send Bitcoin donations to my address
+&lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.&lt;/p&gt;

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-               <title>Aktivitetsbånd som beskytter privatsfæren</title>
-               <link>http://people.skolelinux.org/pere/blog/Aktivitetsb_nd_som_beskytter_privatsf_ren.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Aktivitetsb_nd_som_beskytter_privatsf_ren.html</guid>
-                <pubDate>Thu, 3 Nov 2016 09:55:00 +0100</pubDate>
-               <description>&lt;p&gt;Jeg ble så imponert over
-&lt;a href=&quot;https://www.nrk.no/norge/forbrukerradet-mener-aktivitetsarmband-strider-mot-norsk-lov-1.13209079&quot;&gt;dagens
-gladnyhet på NRK&lt;/a&gt;, om at Forbrukerrådet klager inn vilkårene for
-bruk av aktivitetsbånd fra Fitbit, Garmin, Jawbone og Mio til
-Datatilsynet og forbrukerombudet, at jeg sendte følgende brev til
-forbrukerrådet for å uttrykke min støtte:
-
-&lt;blockquote&gt;
-
-&lt;p&gt;Jeg ble veldig glad over å lese at Forbrukerrådet
-&lt;a href=&quot;http://www.forbrukerradet.no/siste-nytt/klager-inn-aktivitetsarmband-for-brudd-pa-norsk-lov/&quot;&gt;klager
-inn flere aktivitetsbånd til Datatilsynet for dårlige vilkår&lt;/a&gt;.  Jeg
-har ønsket meg et aktivitetsbånd som kan måle puls, bevegelse og
-gjerne også andre helserelaterte indikatorer en stund nå.  De eneste
-jeg har funnet i salg gjør, som dere også har oppdaget, graverende
-inngrep i privatsfæren og sender informasjonen ut av huset til folk og
-organisasjoner jeg ikke ønsker å dele aktivitets- og helseinformasjon
-med.  Jeg ønsker et alternativ som &lt;em&gt;ikke&lt;/em&gt; sender informasjon til
-skyen, men derimot bruker
-&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Fri_og__pen_standard__slik_Digistan_ser_det.html&quot;&gt;en
-fritt og åpent standardisert&lt;/a&gt; protokoll (eller i det minste en
-dokumentert protokoll uten patent- og opphavsrettslige
-bruksbegrensinger) til å kommunisere med datautstyr jeg kontrollerer.
-Er jo ikke interessert i å betale noen for å tilrøve seg
-personopplysninger fra meg.  Desverre har jeg ikke funnet noe
-alternativ så langt.&lt;/p&gt;
-
-&lt;p&gt;Det holder ikke å endre på bruksvilkårene for enhetene, slik
-Datatilsynet ofte legger opp til i sin behandling, når de gjør slik
-f.eks. Fitbit (den jeg har sett mest på).  Fitbit krypterer
-informasjonen på enheten og sender den kryptert til leverandøren.  Det
-gjør det i praksis umulig både å sjekke hva slags informasjon som
-sendes over, og umulig å ta imot informasjonen selv i stedet for
-Fitbit.  Uansett hva slags historie som forteller i bruksvilkårene er
-en jo både prisgitt leverandørens godvilje og at de ikke tvinges av
-sitt lands myndigheter til å lyve til sine kunder om hvorvidt
-personopplysninger spres ut over det bruksvilkårene sier.  Det er
-veldokumentert hvordan f.eks. USA tvinger selskaper vha. såkalte
-National security letters til å utlevere personopplysninger samtidig
-som de ikke får lov til å fortelle dette til kundene sine.&lt;/p&gt;
-
-&lt;p&gt;Stå på, jeg er veldig glade for at dere har sett på saken.  Vet
-dere om aktivitetsbånd i salg i dag som ikke tvinger en til å utlevere
-aktivitets- og helseopplysninger med leverandøren?&lt;/p&gt;
-
-&lt;/blockquote&gt;
-
-&lt;p&gt;Jeg håper en konkurrent som respekterer kundenes privatliv klarer å
-nå opp i markedet, slik at det finnes et reelt alternativ for oss som
-har full tillit til at skyleverandører vil prioritere egen inntjening
-og myndighetspålegg langt foran kundenes rett til privatliv.  Jeg har
-ingen tiltro til at Datatilsynet vil kreve noe mer enn at vilkårene
-endres slik at de forklarer eksplisitt i hvor stor grad bruk av
-produktene utraderer privatsfæren til kundene.  Det vil nok gjøre de
-innklagede armbåndene «lovlige», men fortsatt tvinge kundene til å
-dele sine personopplysninger med leverandøren.&lt;/p&gt;
+               <title>New and improved Frikanalen Kodi addon version 0.0.3</title>
+               <link>http://people.skolelinux.org/pere/blog/New_and_improved_Frikanalen_Kodi_addon_version_0_0_3.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/New_and_improved_Frikanalen_Kodi_addon_version_0_0_3.html</guid>
+                <pubDate>Thu, 8 Nov 2018 10:30:00 +0100</pubDate>
+               <description>&lt;p&gt;If you read my blog regularly, you probably know I am involved in
+running and developing the &lt;a href=&quot;https://frikanalen.no/&quot;&gt;Norwegian
+TV channel Frikanalen&lt;/a&gt;.  It is an open channel, allowing everyone
+in Norway to publish videos on a TV channel with national coverage.
+You can think of it as Youtube for national television.
+In addition to distribution on RiksTV and Uninett, Frikanalen is also
+available as a Kodi addon.  The last few days I have updated the code
+to add more features.  A
+&lt;a href=&quot;https://kodi.tv/addon/plugins-video-add-ons/frikanalen-nett-tv&quot;&gt;new
+and improved version 0.0.3 Frikanalen addon&lt;/a&gt; was just made
+available via the Kodi repositories.  This new version include a
+option to browse videos by category, as well as free text search
+in the video archive.  It will now also show the video duration in the
+video lists, which were missing earlier.  A new and experimental
+link to the HD video stream currently being worked on is provided, for
+those that want to see what the &lt;a href=&quot;https://casparcg.com/&quot;&gt;CasparCG&lt;/a&gt;
+output look like.  The alternative is the SD video stream, generated
+using MLT.  CasparCG is controlled by our
+&lt;a href=&quot;https://github.com/Frikanalen/mltplayout/&quot;&gt;mltplayout
+server&lt;/a&gt; which instead of talking to mlt is giving PLAY instructions
+to the CasparCG server when it is time to start a new program.&lt;/p&gt;
+
+&lt;p&gt;By now, you are probably wondering what kind of content is being
+played on the channel.  These days, it is filled with technical
+presentations like those from &lt;a href=&quot;https://www.nuug.no/&quot;&gt;NUUG&lt;/a&gt;,
+&lt;a href=&quot;https://www.debconf.org/&quot;&gt;Debconf&lt;/a&gt;, Makercon, and TED,
+but there are also some periods with
+&lt;a href=&quot;https://www.empo.no/&quot;&gt;EMPT TV&lt;/a&gt; and
+&lt;a href=&quot;https://www.p7.no/&quot;&gt;P7&lt;/a&gt;.
+
+&lt;p&gt;As usual, if you use Bitcoin and want to show your support of my
+activities, please send Bitcoin donations to my address
+&lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.&lt;/p&gt;

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

-               <title>Experience and updated recipe for using the Signal app without a mobile phone</title>
-               <link>http://people.skolelinux.org/pere/blog/Experience_and_updated_recipe_for_using_the_Signal_app_without_a_mobile_phone.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Experience_and_updated_recipe_for_using_the_Signal_app_without_a_mobile_phone.html</guid>
-                <pubDate>Mon, 10 Oct 2016 11:30:00 +0200</pubDate>
-               <description>&lt;p&gt;In July
-&lt;a href=&quot;http://people.skolelinux.org/pere/blog/How_to_use_the_Signal_app_if_you_only_have_a_land_line__ie_no_mobile_phone_.html&quot;&gt;I
-wrote how to get the Signal Chrome/Chromium app working&lt;/a&gt; without
-the ability to receive SMS messages (aka without a cell phone).  It is
-time to share some experiences and provide an updated setup.&lt;/p&gt;
-
-&lt;p&gt;The Signal app have worked fine for several months now, and I use
-it regularly to chat with my loved ones.  I had a major snag at the
-end of my summer vacation, when the the app completely forgot my
-setup, identity and keys.  The reason behind this major mess was
-running out of disk space.  To avoid that ever happening again I have
-started storing everything in &lt;tt&gt;userdata/&lt;/tt&gt; in git, to be able to
-roll back to an earlier version if the files are wiped by mistake.  I
-had to use it once after introducing the git backup.  When rolling
-back to an earlier version, one need to use the &#39;reset session&#39; option
-in Signal to get going, and notify the people you talk with about the
-problem.  I assume there is some sequence number tracking in the
-protocol to detect rollback attacks.  The git repository is rather big
-(674 MiB so far), but I have not tried to figure out if some of the
-content can be added to a .gitignore file due to lack of spare
-time.&lt;/p&gt;
-
-&lt;p&gt;I&#39;ve also hit the 90 days timeout blocking, and noticed that this
-make it impossible to send messages using Signal.  I could still
-receive them, but had to patch the code with a new timestamp to send.
-I believe the timeout is added by the developers to force people to
-upgrade to the latest version of the app, even when there is no
-protocol changes, to reduce the version skew among the user base and
-thus try to keep the number of support requests down.&lt;/p&gt;
-
-&lt;p&gt;Since my original recipe, the Signal source code changed slightly,
-making the old patch fail to apply cleanly.  Below is an updated
-patch, including the shell wrapper I use to start Signal.  The
-original version required a new user to locate the JavaScript console
-and call a function from there.  I got help from a friend with more
-JavaScript knowledge than me to modify the code to provide a GUI
-button instead.  This mean that to get started you just need to run
-the wrapper and click the &#39;Register without mobile phone&#39; to get going
-now.  I&#39;ve also modified the timeout code to always set it to 90 days
-in the future, to avoid having to patch the code regularly.&lt;/p&gt;
-
-&lt;p&gt;So, the updated recipe for Debian Jessie:&lt;/p&gt;
-
-&lt;ol&gt;
-
-&lt;li&gt;First, install required packages to get the source code and the
-browser you need.  Signal only work with Chrome/Chromium, as far as I
-know, so you need to install it.
-
-&lt;pre&gt;
-apt install git tor chromium
-git clone https://github.com/WhisperSystems/Signal-Desktop.git
-&lt;/pre&gt;&lt;/li&gt;
-
-&lt;li&gt;Modify the source code using command listed in the the patch
-block below.&lt;/li&gt;
-
-&lt;li&gt;Start Signal using the run-signal-app wrapper (for example using
-&lt;tt&gt;`pwd`/run-signal-app&lt;/tt&gt;).
-
-&lt;li&gt;Click on the &#39;Register without mobile phone&#39;, will in a phone
-number you can receive calls to the next minute, receive the
-verification code and enter it into the form field and press
-&#39;Register&#39;.  Note, the phone number you use will be user Signal
-username, ie the way others can find you on Signal.&lt;/li&gt;
-
-&lt;li&gt;You can now use Signal to contact others.  Note, new contacts do
-not show up in the contact list until you restart Signal, and there is
-no way to assign names to Contacts.  There is also no way to create or
-update chat groups.  I suspect this is because the web app do not have
-a associated contact database.&lt;/li&gt;
-
-&lt;/ol&gt;
-
-&lt;p&gt;I am still a bit uneasy about using Signal, because of the way its
-main author moxie0 reject federation and accept dependencies to major
-corporations like Google (part of the code is fetched from Google) and
-Amazon (the central coordination point is owned by Amazon).  See for
-example
-&lt;a href=&quot;https://github.com/LibreSignal/LibreSignal/issues/37&quot;&gt;the
-LibreSignal issue tracker&lt;/a&gt; for a thread documenting the authors
-view on these issues.  But the network effect is strong in this case,
-and several of the people I want to communicate with already use
-Signal.  Perhaps we can all move to &lt;a href=&quot;https://ring.cx/&quot;&gt;Ring&lt;/a&gt;
-once it &lt;a href=&quot;https://bugs.debian.org/830265&quot;&gt;work on my
-laptop&lt;/a&gt;?  It already work on Windows and Android, and is included
-in &lt;a href=&quot;https://tracker.debian.org/pkg/ring&quot;&gt;Debian&lt;/a&gt; and
-&lt;a href=&quot;https://launchpad.net/ubuntu/+source/ring&quot;&gt;Ubuntu&lt;/a&gt;, but not
-working on Debian Stable.&lt;/p&gt;
-
-&lt;p&gt;Anyway, this is the patch I apply to the Signal code to get it
-working.  It switch to the production servers, disable to timeout,
-make registration easier and add the shell wrapper:&lt;/p&gt;
-
-&lt;pre&gt;
-cd Signal-Desktop; cat &amp;lt;&amp;lt;EOF | patch -p1
-diff --git a/js/background.js b/js/background.js
-index 24b4c1d..579345f 100644
---- a/js/background.js
-+++ b/js/background.js
-@@ -33,9 +33,9 @@
-         });
-     });
- 
--    var SERVER_URL = &#39;https://textsecure-service-staging.whispersystems.org&#39;;
-+    var SERVER_URL = &#39;https://textsecure-service-ca.whispersystems.org&#39;;
-     var SERVER_PORTS = [80, 4433, 8443];
--    var ATTACHMENT_SERVER_URL = &#39;https://whispersystems-textsecure-attachments-staging.s3.amazonaws.com&#39;;
-+    var ATTACHMENT_SERVER_URL = &#39;https://whispersystems-textsecure-attachments.s3.amazonaws.com&#39;;
-     var messageReceiver;
-     window.getSocketStatus = function() {
-         if (messageReceiver) {
-diff --git a/js/expire.js b/js/expire.js
-index 639aeae..beb91c3 100644
---- a/js/expire.js
-+++ b/js/expire.js
-@@ -1,6 +1,6 @@
- ;(function() {
-     &#39;use strict&#39;;
--    var BUILD_EXPIRATION = 0;
-+    var BUILD_EXPIRATION = Date.now() + (90 * 24 * 60 * 60 * 1000);
- 
-     window.extension = window.extension || {};
- 
-diff --git a/js/views/install_view.js b/js/views/install_view.js
-index 7816f4f..1d6233b 100644
---- a/js/views/install_view.js
-+++ b/js/views/install_view.js
-@@ -38,7 +38,8 @@
-             return {
-                 &#39;click .step1&#39;: this.selectStep.bind(this, 1),
-                 &#39;click .step2&#39;: this.selectStep.bind(this, 2),
--                &#39;click .step3&#39;: this.selectStep.bind(this, 3)
-+                &#39;click .step3&#39;: this.selectStep.bind(this, 3),
-+                &#39;click .callreg&#39;: function() { extension.install(&#39;standalone&#39;) },
-             };
-         },
-         clearQR: function() {
-diff --git a/options.html b/options.html
-index dc0f28e..8d709f6 100644
---- a/options.html
-+++ b/options.html
-@@ -14,7 +14,10 @@
-         &amp;lt;div class=&#39;nav&#39;&gt;
-           &amp;lt;h1&gt;{{ installWelcome }}&amp;lt;/h1&gt;
-           &amp;lt;p&gt;{{ installTagline }}&amp;lt;/p&gt;
--          &amp;lt;div&gt; &amp;lt;a class=&#39;button step2&#39;&gt;{{ installGetStartedButton }}&amp;lt;/a&gt; &amp;lt;/div&gt;
-+          &amp;lt;div&gt; &amp;lt;a class=&#39;button step2&#39;&gt;{{ installGetStartedButton }}&amp;lt;/a&gt;
-+          &amp;lt;br&gt; &amp;lt;a class=&quot;button callreg&quot;&gt;Register without mobile phone&amp;lt;/a&gt;
-+
-+        &amp;lt;/div&gt;
-           &amp;lt;span class=&#39;dot step1 selected&#39;&gt;&amp;lt;/span&gt;
-           &amp;lt;span class=&#39;dot step2&#39;&gt;&amp;lt;/span&gt;
-           &amp;lt;span class=&#39;dot step3&#39;&gt;&amp;lt;/span&gt;
---- /dev/null   2016-10-07 09:55:13.730181472 +0200
-+++ b/run-signal-app   2016-10-10 08:54:09.434172391 +0200
-@@ -0,0 +1,12 @@
-+#!/bin/sh
-+set -e
-+cd $(dirname $0)
-+mkdir -p userdata
-+userdata=&quot;`pwd`/userdata&quot;
-+if [ -d &quot;$userdata&quot; ] &amp;&amp; [ ! -d &quot;$userdata/.git&quot; ] ; then
-+    (cd $userdata &amp;&amp; git init)
-+fi
-+(cd $userdata &amp;&amp; git add . &amp;&amp; git commit -m &quot;Current status.&quot; || true)
-+exec chromium \
-+  --proxy-server=&quot;socks://localhost:9050&quot; \
-+  --user-data-dir=$userdata --load-and-launch-app=`pwd`
-EOF
-chmod a+rx run-signal-app
-&lt;/pre&gt;
+               <title>Time for an official MIME type for patches?</title>
+               <link>http://people.skolelinux.org/pere/blog/Time_for_an_official_MIME_type_for_patches_.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Time_for_an_official_MIME_type_for_patches_.html</guid>
+                <pubDate>Thu, 1 Nov 2018 08:15:00 +0100</pubDate>
+               <description>&lt;p&gt;As part of my involvement in
+&lt;a href=&quot;https://gitlab.com/OsloMet-ABI/nikita-noark5-core&quot;&gt;the Nikita
+archive API project&lt;/a&gt;, I&#39;ve been importing a fairly large lump of
+emails into a test instance of the archive to see how well this would
+go.  I picked a subset of &lt;a href=&quot;https://notmuchmail.org/&quot;&gt;my
+notmuch email database&lt;/a&gt;, all public emails sent to me via
+@lists.debian.org, giving me a set of around 216 000 emails to import.
+In the process, I had a look at the various attachments included in
+these emails, to figure out what to do with attachments, and noticed
+that one of the most common attachment formats do not have
+&lt;a href=&quot;https://www.iana.org/assignments/media-types/media-types.xhtml&quot;&gt;an
+official MIME type&lt;/a&gt; registered with IANA/IETF.  The output from
+diff, ie the input for patch, is on the top 10 list of formats
+included in these emails.  At the moment people seem to use either
+text/x-patch or text/x-diff, but neither is officially registered.  It
+would be better if one official MIME type were registered and used
+everywhere.&lt;/p&gt;
+
+&lt;p&gt;To try to get one official MIME type for these files, I&#39;ve brought
+up the topic on
+&lt;a href=&quot;https://www.ietf.org/mailman/listinfo/media-types&quot;&gt;the
+media-types mailing list&lt;/a&gt;.  If you are interested in discussion
+which MIME type to use as the official for patch files, or involved in
+making software using a MIME type for patches, perhaps you would like
+to join the discussion?&lt;/p&gt;

 
 &lt;p&gt;As usual, if you use Bitcoin and want to show your support of my
 activities, please send Bitcoin donations to my address
 
 &lt;p&gt;As usual, if you use Bitcoin and want to show your support of my
 activities, please send Bitcoin donations to my address

-&lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&amp;label=PetterReinholdtsenBlog&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.&lt;/p&gt;
+&lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.&lt;/p&gt;

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

-               <title>NRKs kildevern når NRK-epost deles med utenlands etterretning?</title>
-               <link>http://people.skolelinux.org/pere/blog/NRKs_kildevern_n_r_NRK_epost_deles_med_utenlands_etterretning_.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/NRKs_kildevern_n_r_NRK_epost_deles_med_utenlands_etterretning_.html</guid>
-                <pubDate>Sat, 8 Oct 2016 08:15:00 +0200</pubDate>
-               <description>&lt;p&gt;NRK
-&lt;a href=&quot;https://nrkbeta.no/2016/09/02/securing-whistleblowers/&quot;&gt;lanserte
-for noen uker siden&lt;/a&gt; en ny
-&lt;a href=&quot;https://www.nrk.no/varsle/&quot;&gt;varslerportal som bruker
-SecureDrop til å ta imot tips&lt;/a&gt; der det er vesentlig at ingen
-utenforstående får vite at NRK er tipset.  Det er et langt steg
-fremover for NRK, og når en leser bloggposten om hva de har tenkt på
-og hvordan løsningen er satt opp virker det som om de har gjort en
-grundig jobb der.  Men det er ganske mye ekstra jobb å motta tips via
-SecureDrop, så varslersiden skriver &quot;Nyhetstips som ikke krever denne
-typen ekstra vern vil vi gjerne ha på nrk.no/03030&quot;, og 03030-siden
-foreslår i tillegg til et webskjema å bruke epost, SMS, telefon,
-personlig oppmøte og brevpost.  Denne artikkelen handler disse andre
-metodene.&lt;/p&gt;
-
-&lt;p&gt;Når en sender epost til en @nrk.no-adresse så vil eposten sendes ut
-av landet til datamaskiner kontrollert av Microsoft.  En kan sjekke
-dette selv ved å slå opp epostleveringsadresse (MX) i DNS.  For NRK er
-dette i dag &quot;nrk-no.mail.protection.outlook.com&quot;.  NRK har som en ser
-valgt å sette bort epostmottaket sitt til de som står bak outlook.com,
-dvs. Microsoft.  En kan sjekke hvor nettverkstrafikken tar veien
-gjennom Internett til epostmottaket vha. programmet
-&lt;tt&gt;traceroute&lt;/tt&gt;, og finne ut hvem som eier en Internett-adresse
-vha. whois-systemet.  Når en gjør dette for epost-trafikk til @nrk.no
-ser en at trafikken fra Norge mot nrk-no.mail.protection.outlook.com
-går via Sverige mot enten Irland eller Tyskland (det varierer fra gang
-til gang og kan endre seg over tid).&lt;/p&gt;
-
-&lt;p&gt;Vi vet fra
-&lt;a href=&quot;https://no.wikipedia.org/wiki/FRA-loven&quot;&gt;introduksjonen av
-FRA-loven&lt;/a&gt; at IP-trafikk som passerer grensen til Sverige avlyttes
-av Försvarets radioanstalt (FRA).  Vi vet videre takket være
-Snowden-bekreftelsene at trafikk som passerer grensen til
-Storbritannia avlyttes av Government Communications Headquarters
-(GCHQ).  I tillegg er er det nettopp lansert et forslag i Norge om at
-forsvarets E-tjeneste skal få avlytte trafikk som krysser grensen til
-Norge. Jeg er ikke kjent med dokumentasjon på at Irland og Tyskland
-gjør det samme.  Poenget er uansett at utenlandsk etterretning har
-mulighet til å snappe opp trafikken når en sender epost til @nrk.no.
-I tillegg er det selvsagt tilgjengelig for Microsoft som er underlagt USAs
-jurisdiksjon og
-&lt;a href=&quot;https://www.theguardian.com/world/2013/jul/11/microsoft-nsa-collaboration-user-data&quot;&gt;samarbeider
-med USAs etterretning på flere områder&lt;/a&gt;.  De som tipser NRK om
-nyheter via epost kan dermed gå ut fra at det blir kjent for mange
-andre enn NRK at det er gjort.&lt;/p&gt;
-
-&lt;p&gt;Bruk av SMS og telefon registreres av blant annet telefonselskapene
-og er tilgjengelig i følge lov og forskrift for blant annet Politi,
-NAV og Finanstilsynet, i tillegg til IT-folkene hos telefonselskapene
-og deres overordnede.  Hvis innringer eller mottaker bruker
-smarttelefon vil slik kontakt også gjøres tilgjengelig for ulike
-app-leverandører og de som lytter på trafikken mellom telefon og
-app-leverandør, alt etter hva som er installert på telefonene som
-brukes.&lt;/p&gt;
-
-&lt;p&gt;Brevpost kan virke trygt, og jeg vet ikke hvor mye som registreres
-og lagres av postens datastyrte postsorteringssentraler.  Det vil ikke
-overraske meg om det lagres hvor i landet hver konvolutt kommer fra og
-hvor den er adressert, i hvert fall for en kortere periode.  Jeg vet
-heller ikke hvem slik informasjon gjøres tilgjengelig for.  Det kan
-være nok til å ringe inn potensielle kilder når det krysses med hvem
-som kjente til aktuell informasjon og hvor de befant seg (tilgjengelig
-f.eks.  hvis de bærer mobiltelefon eller bor i nærheten).&lt;/p&gt;
-
-&lt;p&gt;Personlig oppmøte hos en NRK-journalist er antagelig det tryggeste,
-men en bør passe seg for å bruke NRK-kantina.  Der bryter de nemlig
-&lt;a href=&quot;http://www.lovdata.no/all/hl-19850524-028.html#14&quot;&gt;Sentralbanklovens
-paragraf 14&lt;/a&gt; og nekter folk å betale med kontanter.  I stedet
-krever de at en varsle sin bankkortutsteder om hvor en befinner seg
-ved å bruke bankkort.  Banktransaksjoner er tilgjengelig for
-bankkortutsteder (det være seg VISA, Mastercard, Nets og/eller en
-bank) i tillegg til politiet og i hvert fall tidligere med Se &amp; Hør
-(via utro tjenere, slik det ble avslørt etter utgivelsen av boken
-«Livet, det forbannede» av Ken B. Rasmussen).  Men hvor mange kjenner
-en NRK-journalist personlig?  Besøk på NRK på Marienlyst krever at en
-registrerer sin ankost elektronisk i besøkssystemet.  Jeg vet ikke hva
-som skjer med det datasettet, men har grunn til å tro at det sendes ut
-SMS til den en skal besøke med navnet som er oppgitt.  Kanskje greit å
-oppgi falskt navn.&lt;/p&gt;
-
-&lt;p&gt;Når så tipset er kommet frem til NRK skal det behandles
-redaksjonelt i NRK.  Der vet jeg via ulike kilder at de fleste
-journalistene bruker lokalt installert programvare, men noen bruker
-Google Docs og andre skytjenester i strid med interne retningslinjer
-når de skriver.  Hvordan vet en hvem det gjelder?  Ikke vet jeg, men
-det kan være greit å spørre for å sjekke at journalisten har tenkt på
-problemstillingen, før en gir et tips.  Og hvis tipset omtales internt
-på epost, er det jo grunn til å tro at også intern eposten vil deles
-med Microsoft og utenlands etterretning, slik tidligere nevnt, men det
-kan hende at det holdes internt i NRKs interne MS Exchange-løsning.
-Men Microsoft ønsker å få alle Exchange-kunder over &quot;i skyen&quot; (eller
-andre folks datamaskiner, som det jo innebærer), så jeg vet ikke hvor
-lenge det i så fall vil vare.&lt;/p&gt;
-
-&lt;p&gt;I tillegg vet en jo at
-&lt;a href=&quot;https://www.nrk.no/ytring/elektronisk-kildevern-i-nrk-1.11941196&quot;&gt;NRK
-har valgt å gi nasjonal sikkerhetsmyndighet (NSM) tilgang til å se på
-intern og ekstern Internett-trafikk&lt;/a&gt; hos NRK ved oppsett av såkalte
-VDI-noder, på tross av
-&lt;a href=&quot;https://www.nrk.no/ytring/bekymring-for-nrks-kildevern-1.11941584&quot;&gt;protester
-fra NRKs journalistlag&lt;/a&gt;.  Jeg vet ikke om den vil kunne snappe opp
-dokumenter som lagres på interne filtjenere eller dokumenter som lages
-i de interne webbaserte publiseringssystemene, men vet at hva noden
-ser etter på nettet kontrolleres av NSM og oppdateres automatisk, slik
-at det ikke gir så mye mening å sjekke hva noden ser etter i dag når
-det kan endres automatisk i morgen.&lt;/p&gt;
-
-&lt;p&gt;Personlig vet jeg ikke om jeg hadde turt tipse NRK hvis jeg satt på
-noe som kunne være en trussel mot den bestående makten i Norge eller
-verden.  Til det virker det å være for mange åpninger for
-utenforstående med andre prioriteter enn NRKs journalistiske fokus.
-Og den største truslen for en varsler er jo om metainformasjon kommer
-på avveie, dvs. informasjon om at en har vært i kontakt med en
-journalist.  Det kan være nok til at en kommer i myndighetenes
-søkelys, og de færreste har nok operasjonell sikkerhet til at vil tåle
-slik flombelysning på sitt privatliv.&lt;/p&gt;
+               <title>Measuring the speaker frequency response using the AUDMES free software GUI - nice free software</title>
+               <link>http://people.skolelinux.org/pere/blog/Measuring_the_speaker_frequency_response_using_the_AUDMES_free_software_GUI___nice_free_software.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Measuring_the_speaker_frequency_response_using_the_AUDMES_free_software_GUI___nice_free_software.html</guid>
+                <pubDate>Mon, 22 Oct 2018 08:40:00 +0200</pubDate>
+               <description>&lt;p&gt;&lt;img src=&quot;http://people.skolelinux.org/pere/blog/images/2018-10-22-audmes-measure-speakers.png&quot; align=&quot;right&quot; width=&quot;40%&quot;/&gt;&lt;/p&gt;
+
+&lt;p&gt;My current home stereo is a patchwork of various pieces I got on
+flee markeds over the years.  It is amazing what kind of equipment
+show up there.  I&#39;ve been wondering for a while if it was possible to
+measure how well this equipment is working together, and decided to
+see how far I could get using free software.  After trawling the web I
+came across an article from DIY Audio and Video on
+&lt;a href=&quot;https://www.diyaudioandvideo.com/Tutorial/SpeakerResponseTesting/&quot;&gt;Speaker
+Testing and Analysis&lt;/a&gt; describing how to test speakers, and it listing
+several software options, among them
+&lt;a href=&quot;https://sourceforge.net/projects/audmes/&quot;&gt;AUDio MEasurement
+System (AUDMES)&lt;/a&gt;.  It is the only free software system I could find
+focusing on measuring speakers and audio frequency response.  In the
+process I also found an interesting article from NOVO on
+&lt;a href=&quot;http://novo.press/understanding-speaker-specifications-and-frequency-response/&quot;&gt;Understanding
+Speaker Specifications and Frequency Response&lt;/a&gt; and an article from
+ecoustics on
+&lt;a href=&quot;https://www.ecoustics.com/articles/understanding-speaker-frequency-response/&quot;&gt;Understanding
+Speaker Frequency Response&lt;/a&gt;, with a lot of information on what to
+look for and how to interpret the graphs.  Armed with this knowledge,
+I set out to measure the state of my speakers.&lt;/p&gt;
+
+&lt;p&gt;The first hurdle was that AUDMES hadn&#39;t seen a commit for 10 years
+and did not build with current compilers and libraries.  I got in
+touch with its author, who no longer was spending time on the program
+but gave me write access to the subversion repository on Sourceforge.
+The end result is that now the code build on Linux and is capable of
+saving and loading the collected frequency response data in CSV
+format.  The application is quite nice and flexible, and I was able to
+select the input and output audio interfaces independently.  This made
+it possible to use a USB mixer as the input source, while sending
+output via my laptop headphone connection.  I lacked the hardware and
+cabling to figure out a different way to get independent cabling to
+speakers and microphone.&lt;/p&gt;
+
+&lt;p&gt;Using this setup I could see how a large range of high frequencies
+apparently were not making it out of my speakers.  The picture show
+the frequency response measurement of one of the speakers.  Note the
+frequency lines seem to be slightly misaligned, compared to the CSV
+output from the program.  I can not hear several of these are high
+frequencies, according to measurement from
+&lt;a href=&quot;http://freehearingtestsoftware.com&quot;&gt;Free Hearing Test
+Software&lt;/a&gt;, an freeware system to measure your hearing (still
+looking for a free software alternative), so I do not know if they are
+coming out out the speakers.  I thus do not quite know how to figure
+out if the missing frequencies is a problem with the microphone, the
+amplifier or the speakers, but I managed to rule out the audio card in my
+PC by measuring my Bose noise canceling headset using its own
+microphone.  This setup was able to see the high frequency tones, so
+the problem with my stereo had to be in the amplifier or speakers.&lt;/p&gt;
+
+&lt;p&gt;Anyway, to try to role out one factor I ended up picking up a new
+set of speakers at a flee marked, and these work a lot better than the
+old speakers, so I guess the microphone and amplifier is OK.  If you
+need to measure your own speakers, check out AUDMES.  If more people
+get involved, perhaps the project could become good enough to
+&lt;a href=&quot;https://bugs.debian.org/910876&quot;&gt;include in Debian&lt;/a&gt;?  And if
+you know of some other free software to measure speakers and amplifier
+performance, please let me know.  I am aware of the freeware option
+&lt;a href=&quot;https://www.roomeqwizard.com/&quot;&gt;REW&lt;/a&gt;, but I want something
+that can be developed also when the vendor looses interest.&lt;/p&gt;
+
+&lt;p&gt;As usual, if you use Bitcoin and want to show your support of my
+activities, please send Bitcoin donations to my address
+&lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.&lt;/p&gt;

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

-               <title>Isenkram, Appstream and udev make life as a LEGO builder easier</title>
-               <link>http://people.skolelinux.org/pere/blog/Isenkram__Appstream_and_udev_make_life_as_a_LEGO_builder_easier.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Isenkram__Appstream_and_udev_make_life_as_a_LEGO_builder_easier.html</guid>
-                <pubDate>Fri, 7 Oct 2016 09:50:00 +0200</pubDate>
-               <description>&lt;p&gt;&lt;a href=&quot;http://packages.qa.debian.org/isenkram&quot;&gt;The Isenkram
-system&lt;/a&gt; provide a practical and easy way to figure out which
-packages support the hardware in a given machine.  The command line
-tool &lt;tt&gt;isenkram-lookup&lt;/tt&gt; and the tasksel options provide a
-convenient way to list and install packages relevant for the current
-hardware during system installation, both user space packages and
-firmware packages. The GUI background daemon on the other hand provide
-a pop-up proposing to install packages when a new dongle is inserted
-while using the computer.  For example, if you plug in a smart card
-reader, the system will ask if you want to install &lt;tt&gt;pcscd&lt;/tt&gt; if
-that package isn&#39;t already installed, and if you plug in a USB video
-camera the system will ask if you want to install &lt;tt&gt;cheese&lt;/tt&gt; if
-cheese is currently missing.  This already work just fine.&lt;/p&gt;
-
-&lt;p&gt;But Isenkram depend on a database mapping from hardware IDs to
-package names.  When I started no such database existed in Debian, so
-I made my own data set and included it with the isenkram package and
-made isenkram fetch the latest version of this database from git using
-http.  This way the isenkram users would get updated package proposals
-as soon as I learned more about hardware related packages.&lt;/p&gt;
-
-&lt;p&gt;The hardware is identified using modalias strings.  The modalias
-design is from the Linux kernel where most hardware descriptors are
-made available as a strings that can be matched using filename style
-globbing.  It handle USB, PCI, DMI and a lot of other hardware related
-identifiers.&lt;/p&gt;
-
-&lt;p&gt;The downside to the Isenkram specific database is that there is no
-information about relevant distribution / Debian version, making
-isenkram propose obsolete packages too.  But along came AppStream, a
-cross distribution mechanism to store and collect metadata about
-software packages.  When I heard about the proposal, I contacted the
-people involved and suggested to add a hardware matching rule using
-modalias strings in the specification, to be able to use AppStream for
-mapping hardware to packages.  This idea was accepted and AppStream is
-now a great way for a package to announce the hardware it support in a
-distribution neutral way.  I wrote
-&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Using_appstream_with_isenkram_to_install_hardware_related_packages_in_Debian.html&quot;&gt;a
-recipe on how to add such meta-information&lt;/a&gt; in a blog post last
-December.  If you have a hardware related package in Debian, please
-announce the relevant hardware IDs using AppStream.&lt;/p&gt;
-
-&lt;p&gt;In Debian, almost all packages that can talk to a LEGO Mindestorms
-RCX or NXT unit, announce this support using AppStream.  The effect is
-that when you insert such LEGO robot controller into your Debian
-machine, Isenkram will propose to install the packages needed to get
-it working.  The intention is that this should allow the local user to
-start programming his robot controller right away without having to
-guess what packages to use or which permissions to fix.&lt;/p&gt;
-
-&lt;p&gt;But when I sat down with my son the other day to program our NXT
-unit using his Debian Stretch computer, I discovered something
-annoying.  The local console user (ie my son) did not get access to
-the USB device for programming the unit.  This used to work, but no
-longer in Jessie and Stretch.  After some investigation and asking
-around on #debian-devel, I discovered that this was because udev had
-changed the mechanism used to grant access to local devices.  The
-ConsoleKit mechanism from &lt;tt&gt;/lib/udev/rules.d/70-udev-acl.rules&lt;/tt&gt;
-no longer applied, because LDAP users no longer was added to the
-plugdev group during login.  Michael Biebl told me that this method
-was obsolete and the new method used ACLs instead.  This was good
-news, as the plugdev mechanism is a mess when using a remote user
-directory like LDAP.  Using ACLs would make sure a user lost device
-access when she logged out, even if the user left behind a background
-process which would retain the plugdev membership with the ConsoleKit
-setup.  Armed with this knowledge I moved on to fix the access problem
-for the LEGO Mindstorms related packages.&lt;/p&gt;
-
-&lt;p&gt;The new system uses a udev tag, &#39;uaccess&#39;.  It can either be
-applied directly for a device, or is applied in
-/lib/udev/rules.d/70-uaccess.rules for classes of devices.  As the
-LEGO Mindstorms udev rules did not have a class, I decided to add the
-tag directly in the udev rules files included in the packages.  Here
-is one example.  For the nqc C compiler for the RCX, the
-&lt;tt&gt;/lib/udev/rules.d/60-nqc.rules&lt;/tt&gt; file now look like this:
+               <title>Web browser integration of VLC with Bittorrent support</title>
+               <link>http://people.skolelinux.org/pere/blog/Web_browser_integration_of_VLC_with_Bittorrent_support.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Web_browser_integration_of_VLC_with_Bittorrent_support.html</guid>
+                <pubDate>Sun, 21 Oct 2018 09:50:00 +0200</pubDate>
+               <description>&lt;p&gt;Bittorrent is as far as I know, currently the most efficient way to
+distribute content on the Internet.  It is used all by all sorts of
+content providers, from national TV stations like
+&lt;a href=&quot;https://www.nrk.no/&quot;&gt;NRK&lt;/a&gt;, Linux distributors like
+&lt;a href=&quot;https://www.debian.org/&quot;&gt;Debian&lt;/a&gt; and
+&lt;a href=&quot;https://www.ubuntu.com/&quot;&gt;Ubuntu&lt;/a&gt;, and of course the
+&lt;a href=&quot;https://archive.org/&quot;&gt;Internet archive&lt;/A&gt;.
+
+&lt;p&gt;Almost a month ago
+&lt;a href=&quot;https://tracker.debian.org/pkg/vlc-plugin-bittorrent&quot;&gt;a new
+package adding Bittorrent support to VLC&lt;/a&gt; became available in
+Debian testing and unstable.  To test it, simply install it like
+this:&lt;/p&gt;

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

-SUBSYSTEM==&quot;usb&quot;, ACTION==&quot;add&quot;, ATTR{idVendor}==&quot;0694&quot;, ATTR{idProduct}==&quot;0001&quot;, \
-    SYMLINK+=&quot;rcx-%k&quot;, TAG+=&quot;uaccess&quot;
+apt install vlc-plugin-bittorrent

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

-&lt;p&gt;The key part is the &#39;TAG+=&quot;uaccess&quot;&#39; at the end.  I suspect all
-packages using plugdev in their /lib/udev/rules.d/ files should be
-changed to use this tag (either directly or indirectly via
-&lt;tt&gt;70-uaccess.rules&lt;/tt&gt;).  Perhaps a lintian check should be created
-to detect this?&lt;/p&gt;
-
-&lt;p&gt;I&#39;ve been unable to find good documentation on the uaccess feature.
-It is unclear to me if the uaccess tag is an internal implementation
-detail like the udev-acl tag used by
-&lt;tt&gt;/lib/udev/rules.d/70-udev-acl.rules&lt;/tt&gt;.  If it is, I guess the
-indirect method is the preferred way.  Michael
-&lt;a href=&quot;https://github.com/systemd/systemd/issues/4288&quot;&gt;asked for more
-documentation from the systemd project&lt;/a&gt; and I hope it will make
-this clearer.  For now I use the generic classes when they exist and
-is already handled by &lt;tt&gt;70-uaccess.rules&lt;/tt&gt;, and add the tag
-directly if no such class exist.&lt;/p&gt;
-
-&lt;p&gt;To learn more about the isenkram system, please check out
-&lt;a href=&quot;http://people.skolelinux.org/pere/blog/tags/isenkram/&quot;&gt;my
-blog posts tagged isenkram&lt;/a&gt;.&lt;/p&gt;
-
-&lt;p&gt;To help out making life for LEGO constructors in Debian easier,
-please join us on our IRC channel
-&lt;a href=&quot;irc://irc.debian.org/%23debian-lego&quot;&gt;#debian-lego&lt;/a&gt; and join
-the &lt;a href=&quot;https://alioth.debian.org/projects/debian-lego/&quot;&gt;Debian
-LEGO team&lt;/a&gt; in the Alioth project we created yesterday.  A mailing
-list is not yet created, but we are working on it. :)&lt;/p&gt;
+&lt;p&gt;Since the plugin was made available for the first time in Debian,
+several improvements have been made to it.  In version 2.2-4, now
+available in both testing and unstable, a desktop file is provided to
+teach browsers to start VLC when the user click on torrent files or
+magnet links.  The last part is thanks to me finally understanding
+what the strange x-scheme-handler style MIME types in desktop files
+are used for.  By adding x-scheme-handler/magnet to the MimeType entry
+in the desktop file, at least the browsers Firefox and Chromium will
+suggest to start VLC when selecting a magnet URI on a web page.  The
+end result is that now, with the plugin installed in Buster and Sid,
+one can visit any
+&lt;a href=&quot;https://archive.org/details/CopyingIsNotTheft1080p&quot;&gt;Internet
+Archive page with movies&lt;/a&gt; using a web browser and click on the
+torrent link to start streaming the movie.&lt;/p&gt;
+
+&lt;p&gt;Note, there is still some misfeatures in the plugin.  One is the
+fact that it will hang and
+&lt;a href=&quot;https://github.com/johang/vlc-bittorrent/issues/13&quot;&gt;block VLC
+from exiting until the torrent streaming starts&lt;/a&gt;.  Another is the
+fact that it
+&lt;a href=&quot;https://github.com/johang/vlc-bittorrent/issues/9&quot;&gt;will pick
+and play a random file in a multi file torrent&lt;/a&gt;.  This is not
+always the video file you want.  Combined with the first it can be a
+bit hard to get the video streaming going.  But when it work, it seem
+to do a good job.&lt;/p&gt;
+
+&lt;p&gt;For the Debian packaging, I would love to find a good way to test
+if the plugin work with VLC using autopkgtest.  I tried, but do not
+know enough of the inner workings of VLC to get it working.  For now
+the autopkgtest script is only checking if the .so file was
+successfully loaded by VLC.  If you have any suggestions, please
+submit a patch to the Debian bug tracking system.&lt;/p&gt;

 
 &lt;p&gt;As usual, if you use Bitcoin and want to show your support of my
 activities, please send Bitcoin donations to my address
 
 &lt;p&gt;As usual, if you use Bitcoin and want to show your support of my
 activities, please send Bitcoin donations to my address

-&lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&amp;label=PetterReinholdtsenBlog&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.&lt;/p&gt;
+&lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.&lt;/p&gt;

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

-               <title>Aftenposten-redaktøren med lua i hånda</title>
-               <link>http://people.skolelinux.org/pere/blog/Aftenposten_redakt_ren_med_lua_i_h_nda.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Aftenposten_redakt_ren_med_lua_i_h_nda.html</guid>
-                <pubDate>Fri, 9 Sep 2016 11:30:00 +0200</pubDate>
-               <description>&lt;p&gt;En av dagens nyheter er at Aftenpostens redaktør Espen Egil Hansen
-bruker
-&lt;a href=&quot;https://www.nrk.no/kultur/aftenposten-brukar-heile-forsida-pa-facebook-kritikk-1.13126918&quot;&gt;forsiden
-av papiravisen på et åpent brev til Facebooks sjef Mark Zuckerberg om
-Facebooks fjerning av bilder, tekster og sider de ikke liker&lt;/a&gt;.  Det
-må være uvant for redaktøren i avisen Aftenposten å stå med lua i
-handa og håpe på å bli hørt.  Spesielt siden Aftenposten har vært med
-på å gi Facebook makten de nå demonstrerer at de har.  Ved å melde seg
-inn i Facebook-samfunnet har de sagt ja til bruksvilkårene og inngått
-en antagelig bindende avtale.  Kanskje de skulle lest og vurdert
-vilkårene litt nærmere før de sa ja, i stedet for å klage over at
-reglende de har valgt å akseptere blir fulgt?  Personlig synes jeg
-vilkårene er uakseptable og det ville ikke falle meg inn å gå inn på
-en avtale med slike vilkår.  I tillegg til uakseptable vilkår er det
-mange andre grunner til å unngå Facebook.  Du kan finne en solid
-gjennomgang av flere slike argumenter hos
-&lt;a href=&quot;https://stallman.org/facebook.html&quot;&gt;Richard Stallmans side om
-Facebook&lt;/a&gt;.
-
-&lt;p&gt;Jeg håper flere norske redaktører på samme vis må stå med lua i
-hånden inntil de forstår at de selv er med på å føre samfunnet på
-ville veier ved å omfavne Facebook slik de gjør når de omtaler og
-løfter frem saker fra Facebook, og tar i bruk Facebook som
-distribusjonskanal for sine nyheter.  De bidrar til
-overvåkningssamfunnet og raderer ut lesernes privatsfære når de lenker
-til Facebook på sine sider, og låser seg selv inne i en omgivelse der
-det er Facebook, og ikke redaktøren, som sitter med makta.&lt;/p&gt;
-
-&lt;p&gt;Men det vil nok ta tid, i et Norge der de fleste nettredaktører
-&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Snurpenot_overv_kning_av_sensitiv_personinformasjon.html&quot;&gt;deler
-sine leseres personopplysinger med utenlands etterretning&lt;/a&gt;.&lt;/p&gt;
-
-&lt;p&gt;For øvrig burde varsleren Edward Snowden få politisk asyl i
-Norge.&lt;/p&gt;
+               <title>Release 0.2 of free software archive system Nikita announced</title>
+               <link>http://people.skolelinux.org/pere/blog/Release_0_2_of_free_software_archive_system_Nikita_announced.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Release_0_2_of_free_software_archive_system_Nikita_announced.html</guid>
+                <pubDate>Thu, 18 Oct 2018 14:40:00 +0200</pubDate>
+               <description>&lt;p&gt;This morning, the new release of the
+&lt;a href=&quot;https://gitlab.com/OsloMet-ABI/nikita-noark5-core/&quot;&gt;Nikita
+Noark 5 core project&lt;/a&gt; was
+&lt;a href=&quot;https://lists.nuug.no/pipermail/nikita-noark/2018-October/000406.html&quot;&gt;announced
+on the project mailing list&lt;/a&gt;.  The free software solution is an
+implementation of the Norwegian archive standard Noark 5 used by
+government offices in Norway.  These were the changes in version 0.2
+since version 0.1.1 (from NEWS.md):
+
+&lt;ul&gt;
+  &lt;li&gt;Fix typos in REL names&lt;/li&gt;
+  &lt;li&gt;Tidy up error message reporting&lt;/li&gt;
+  &lt;li&gt;Fix issue where we used Integer.valueOf(), not Integer.getInteger()&lt;/li&gt;
+  &lt;li&gt;Change some String handling to StringBuffer&lt;/li&gt;
+  &lt;li&gt;Fix error reporting&lt;/li&gt;
+  &lt;li&gt;Code tidy-up&lt;/li&gt;
+  &lt;li&gt;Fix issue using static non-synchronized SimpleDateFormat to avoid 
+      race conditions&lt;/li&gt;
+  &lt;li&gt;Fix problem where deserialisers were treating integers as strings&lt;/li&gt;
+  &lt;li&gt;Update methods to make them null-safe&lt;/li&gt;
+  &lt;li&gt;Fix many issues reported by coverity&lt;/li&gt;
+  &lt;li&gt;Improve equals(), compareTo() and hash() in domain model&lt;/li&gt;
+  &lt;li&gt;Improvements to the domain model for metadata classes&lt;/li&gt;
+  &lt;li&gt;Fix CORS issues when downloading document&lt;/li&gt;
+  &lt;li&gt;Implementation of case-handling with registryEntry and document upload&lt;/li&gt;
+  &lt;li&gt;Better support in Javascript for OPTIONS&lt;/li&gt;
+  &lt;li&gt;Adding concept description of mail integration&lt;/li&gt;
+  &lt;li&gt;Improve setting of default values for GET on ny-journalpost&lt;/li&gt;
+  &lt;li&gt;Better handling of required values during deserialisation &lt;/li&gt;
+  &lt;li&gt;Changed tilknyttetDato (M620) from date to dateTime&lt;/li&gt;
+  &lt;li&gt;Corrected some opprettetDato (M600) (de)serialisation errors.&lt;/li&gt;
+  &lt;li&gt;Improve parse error reporting.&lt;/li&gt;
+  &lt;li&gt;Started on OData search and filtering.&lt;/li&gt;
+  &lt;li&gt;Added Contributor Covenant Code of Conduct to project.&lt;/li&gt;
+  &lt;li&gt;Moved repository and project from Github to Gitlab.&lt;/li&gt;
+  &lt;li&gt;Restructured repository, moved code into src/ and web/.&lt;/li&gt;
+  &lt;li&gt;Updated code to use Spring Boot version 2.&lt;/li&gt;
+  &lt;li&gt;Added support for OAuth2 authentication.&lt;/li&gt;
+  &lt;li&gt;Fixed several bugs discovered by Coverity.&lt;/li&gt;
+  &lt;li&gt;Corrected handling of date/datetime fields.&lt;/li&gt;
+  &lt;li&gt;Improved error reporting when rejecting during deserializatoin.&lt;/li&gt;
+  &lt;li&gt;Adjusted default values provided for ny-arkivdel, ny-mappe,
+   ny-saksmappe, ny-journalpost and ny-dokumentbeskrivelse.&lt;/li&gt;
+  &lt;li&gt;Several fixes for korrespondansepart*.&lt;/li&gt;
+  &lt;li&gt;Updated web GUI:
+     &lt;ul&gt;
+       &lt;li&gt;Now handle both file upload and download.&lt;/li&gt;
+       &lt;li&gt;Uses new OAuth2 authentication for login.&lt;/li&gt;
+       &lt;li&gt;Forms now fetches default values from API using GET.&lt;/li&gt;
+       &lt;li&gt;Added RFC 822 (email), TIFF and JPEG to list of possible file formats.&lt;/li&gt;
+     &lt;/ul&gt;&lt;/li&gt;
+&lt;/ul&gt;
+
+&lt;p&gt;The changes and improvements are extensive.  Running diffstat on
+the changes between git tab 0.1.1 and 0.2 show 1098 files changed,
+108666 insertions(+), 54066 deletions(-).&lt;/p&gt;
+
+&lt;p&gt;If free and open standardized archiving API sound interesting to
+you, please contact us on IRC
+(&lt;a href=&quot;irc://irc.freenode.net/%23nikita&quot;&gt;#nikita on
+irc.freenode.net&lt;/a&gt;) or email
+(&lt;a href=&quot;https://lists.nuug.no/mailman/listinfo/nikita-noark&quot;&gt;nikita-noark
+mailing list&lt;/a&gt;).&lt;/p&gt;
+
+&lt;p&gt;As usual, if you use Bitcoin and want to show your support of my
+activities, please send Bitcoin donations to my address
+&lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.&lt;/p&gt;

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

-               <title>E-tjenesten ber om innsyn i eposten til partiene på Stortinget</title>
-               <link>http://people.skolelinux.org/pere/blog/E_tjenesten_ber_om_innsyn_i_eposten_til_partiene_p__Stortinget.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/E_tjenesten_ber_om_innsyn_i_eposten_til_partiene_p__Stortinget.html</guid>
-                <pubDate>Tue, 6 Sep 2016 23:00:00 +0200</pubDate>
-               <description>&lt;p&gt;I helga kom det et hårreisende forslag fra Lysne II-utvalget satt
-ned av Forsvarsdepartementet.  Lysne II-utvalget var bedt om å vurdere
-ønskelista til Forsvarets etterretningstjeneste (e-tjenesten), og har
-kommet med
-&lt;a href=&quot;http://www.aftenposten.no/norge/Utvalg-sier-ja-til-at-E-tjenesten-far-overvake-innholdet-i-all-internett--og-telefontrafikk-som-krysser-riksgrensen-603232b.html&quot;&gt;forslag
-om at e-tjenesten skal få lov til a avlytte all Internett-trafikk&lt;/a&gt;
-som passerer Norges grenser.  Få er klar over at dette innebærer at
-e-tjenesten får tilgang til epost sendt til de fleste politiske
-partiene på Stortinget.  Regjeringspartiet Høyre (@hoyre.no),
-støttepartiene Venstre (@venstre.no) og Kristelig Folkeparti (@krf.no)
-samt Sosialistisk Ventreparti (@sv.no) og Miljøpartiet de grønne
-(@mdg.no) har nemlig alle valgt å ta imot eposten sin via utenlandske
-tjenester.  Det betyr at hvis noen sender epost til noen med en slik
-adresse vil innholdet i eposten, om dette forslaget blir vedtatt, gjøres
-tilgjengelig for e-tjenesten.  Venstre, Sosialistisk Ventreparti og
-Miljøpartiet De Grønne har valgt å motta sin epost hos Google,
-Kristelig Folkeparti har valgt å motta sin epost hos Microsoft, og
-Høyre har valgt å motta sin epost hos Comendo med mottak i Danmark og
-Irland.  Kun Arbeiderpartiet og Fremskrittspartiet har valgt å motta
-eposten sin i Norge, hos henholdsvis Intility AS og Telecomputing
-AS.&lt;/p&gt;
-
-&lt;p&gt;Konsekvensen er at epost inn og ut av de politiske organisasjonene,
-til og fra partimedlemmer og partiets tillitsvalgte vil gjøres
-tilgjengelig for e-tjenesten for analyse og sortering.  Jeg mistenker
-at kunnskapen som slik blir tilgjengelig vil være nyttig hvis en
-ønsker å vite hvilke argumenter som treffer publikum når en ønsker å
-påvirke Stortingets representanter.&lt;/p
-
-&lt;p&gt;Ved hjelp av MX-oppslag i DNS for epost-domene, tilhørende
-whois-oppslag av IP-adressene og traceroute for å se hvorvidt
-trafikken går via utlandet kan enhver få bekreftet at epost sendt til
-de omtalte partiene vil gjøres tilgjengelig for forsvarets
-etterretningstjeneste hvis forslaget blir vedtatt.  En kan også bruke
-den kjekke nett-tjenesten &lt;a href=&quot;http://ipinfo.io/&quot;&gt;ipinfo.io&lt;/a&gt;
-for å få en ide om hvor i verden en IP-adresse hører til.&lt;/p&gt;
-
-&lt;p&gt;På den positive siden vil forslaget gjøre at enda flere blir
-motivert til å ta grep for å bruke
-&lt;a href=&quot;https://www.torproject.org/&quot;&gt;Tor&lt;/a&gt; og krypterte
-kommunikasjonsløsninger for å kommunisere med sine kjære, for å sikre
-at privatsfæren vernes.  Selv bruker jeg blant annet
-&lt;a href=&quot;https://www.freedomboxfoundation.org/&quot;&gt;FreedomBox&lt;/a&gt; og
-&lt;a href=&quot;https://whispersystems.org/&quot;&gt;Signal&lt;/a&gt; til slikt.  Ingen av
-dem er optimale, men de fungerer ganske bra allerede og øker kostnaden
-for dem som ønsker å invadere mitt privatliv.&lt;/p&gt;
-
-&lt;p&gt;For øvrig burde varsleren Edward Snowden få politisk asyl i
-Norge.&lt;/p&gt;
-
-&lt;!--
-
-venstre.no
-  venstre.no mail is handled by 10 aspmx.l.google.com.
-  venstre.no mail is handled by 20 alt1.aspmx.l.google.com.
-  venstre.no mail is handled by 20 alt2.aspmx.l.google.com.
-  venstre.no mail is handled by 30 aspmx2.googlemail.com.
-  venstre.no mail is handled by 30 aspmx3.googlemail.com.
-
-traceroute to aspmx.l.google.com (173.194.222.27), 30 hops max, 60 byte packets
- 1  uio-gw10.uio.no (129.240.6.1)  0.411 ms  0.438 ms  0.536 ms
- 2  uio-gw8.uio.no (129.240.24.229)  0.375 ms  0.452 ms  0.548 ms
- 3  oslo-gw1.uninett.no (128.39.65.17)  1.940 ms  1.950 ms  1.942 ms
- 4  se-tug.nordu.net (109.105.102.108)  6.910 ms  6.949 ms  7.283 ms
- 5  google-gw.nordu.net (109.105.98.6)  6.975 ms  6.967 ms  6.958 ms
- 6  209.85.250.192 (209.85.250.192)  7.337 ms  7.286 ms  10.890 ms
- 7  209.85.254.13 (209.85.254.13)  7.394 ms 209.85.254.31 (209.85.254.31)  7.586 ms 209.85.254.33 (209.85.254.33)  7.570 ms
- 8  209.85.251.255 (209.85.251.255)  15.686 ms 209.85.249.229 (209.85.249.229)  16.118 ms 209.85.251.255 (209.85.251.255)  16.073 ms
- 9  74.125.37.255 (74.125.37.255)  16.794 ms 216.239.40.248 (216.239.40.248)  16.113 ms 74.125.37.44 (74.125.37.44)  16.764 ms
-10  * * *
-
-mdg.no
-  mdg.no mail is handled by 1 aspmx.l.google.com.
-  mdg.no mail is handled by 5 alt2.aspmx.l.google.com.
-  mdg.no mail is handled by 5 alt1.aspmx.l.google.com.
-  mdg.no mail is handled by 10 aspmx2.googlemail.com.
-  mdg.no mail is handled by 10 aspmx3.googlemail.com.
-sv.no
-  sv.no mail is handled by 1 aspmx.l.google.com.
-  sv.no mail is handled by 5 alt1.aspmx.l.google.com.
-  sv.no mail is handled by 5 alt2.aspmx.l.google.com.
-  sv.no mail is handled by 10 aspmx3.googlemail.com.
-  sv.no mail is handled by 10 aspmx2.googlemail.com.
-hoyre.no
-  hoyre.no mail is handled by 10 hoyre-no.mx1.comendosystems.com.
-  hoyre.no mail is handled by 20 hoyre-no.mx2.comendosystems.net.
-
-traceroute to hoyre-no.mx1.comendosystems.com (89.104.206.4), 30 hops max, 60 byte packets
- 1  uio-gw10.uio.no (129.240.6.1)  0.450 ms  0.510 ms  0.591 ms
- 2  uio-gw8.uio.no (129.240.24.229)  0.383 ms  0.508 ms  0.596 ms
- 3  oslo-gw1.uninett.no (128.39.65.17)  0.311 ms  0.315 ms  0.300 ms
- 4  se-tug.nordu.net (109.105.102.108)  6.837 ms  6.842 ms  6.834 ms
- 5  dk-uni.nordu.net (109.105.97.10)  26.073 ms  26.085 ms  26.076 ms
- 6  dix.1000m.soeborg.ip.comendo.dk (192.38.7.22)  15.372 ms  15.046 ms  15.123 ms
- 7  89.104.192.65 (89.104.192.65)  15.875 ms  15.990 ms  16.239 ms
- 8  89.104.192.179 (89.104.192.179)  15.676 ms  15.674 ms  15.664 ms
- 9  03dm-com.mx1.staysecuregroup.com (89.104.206.4)  15.637 ms * *
-
-krf.no
-  krf.no mail is handled by 10 krf-no.mail.protection.outlook.com.
-
-traceroute to krf-no.mail.protection.outlook.com (213.199.154.42), 30 hops max, 60 byte packets
- 1  uio-gw10.uio.no (129.240.6.1)  0.401 ms  0.438 ms  0.536 ms
- 2  uio-gw8.uio.no (129.240.24.229)  11.076 ms  11.120 ms  11.204 ms
- 3  oslo-gw1.uninett.no (128.39.65.17)  0.232 ms  0.234 ms  0.271 ms
- 4  se-tug.nordu.net (109.105.102.108)  6.811 ms  6.820 ms  6.815 ms
- 5  netnod-ix-ge-a-sth-4470.microsoft.com (195.245.240.181)  7.074 ms  7.013 ms  7.061 ms
- 6  ae1-0.sto-96cbe-1b.ntwk.msn.net (104.44.225.161)  7.227 ms  7.362 ms  7.293 ms
- 7  be-8-0.ibr01.ams.ntwk.msn.net (104.44.5.7)  41.993 ms  43.334 ms  41.939 ms
- 8  be-1-0.ibr02.ams.ntwk.msn.net (104.44.4.214)  43.153 ms  43.507 ms  43.404 ms
- 9  ae3-0.fra-96cbe-1b.ntwk.msn.net (104.44.5.17)  29.897 ms  29.831 ms  29.794 ms
-10  ae10-0.vie-96cbe-1a.ntwk.msn.net (198.206.164.1)  42.309 ms  42.130 ms  41.808 ms
-11  * ae8-0.vie-96cbe-1b.ntwk.msn.net (104.44.227.29)  41.425 ms *
-12  * * *
-
-arbeiderpartiet.no
-  arbeiderpartiet.no mail is handled by 10 mail.intility.com.
-  arbeiderpartiet.no mail is handled by 20 mail2.intility.com.
-
-traceroute to mail.intility.com (188.95.245.87), 30 hops max, 60 byte packets
- 1  uio-gw10.uio.no (129.240.6.1)  0.486 ms  0.508 ms  0.649 ms
- 2  uio-gw8.uio.no (129.240.24.229)  0.416 ms  0.508 ms  0.620 ms
- 3  oslo-gw1.uninett.no (128.39.65.17)  0.276 ms  0.278 ms  0.275 ms
- 4  te3-1-2.br1.fn3.as2116.net (193.156.90.3)  0.374 ms  0.371 ms  0.416 ms
- 5  he16-1-1.cr1.san110.as2116.net (195.0.244.234)  3.132 ms he16-1-1.cr2.oslosda310.as2116.net (195.0.244.48)  10.079 ms he16-1-1.cr1.san110.as2116.net (195.0.244.234)  3.353 ms
- 6  te1-2-0.ar2.ulv89.as2116.net (195.0.243.194)  0.569 ms te5-0-0.ar2.ulv89.as2116.net (195.0.243.192)  0.661 ms  0.653 ms
- 7  cD2EC45C1.static.as2116.net (193.69.236.210)  0.654 ms  0.615 ms  0.590 ms
- 8  185.7.132.38 (185.7.132.38)  1.661 ms  1.808 ms  1.695 ms
- 9  185.7.132.100 (185.7.132.100)  1.793 ms  1.943 ms  1.546 ms
-10  * * *
-
-frp.no
-  frp.no mail is handled by 10 mx03.telecomputing.no.
-  frp.no mail is handled by 20 mx01.telecomputing.no.
-
-traceroute to mx03.telecomputing.no (95.128.105.102), 30 hops max, 60 byte packets
- 1  uio-gw10.uio.no (129.240.6.1)  0.378 ms  0.402 ms  0.479 ms
- 2  uio-gw8.uio.no (129.240.24.229)  0.361 ms  0.458 ms  0.548 ms
- 3  oslo-gw1.uninett.no (128.39.65.17)  0.361 ms  0.352 ms  0.336 ms
- 4  xe-2-2-0-0.san-peer2.osl.no.ip.tdc.net (193.156.90.16)  0.375 ms  0.366 ms  0.346 ms
- 5  xe-2-0-2-0.ost-pe1.osl.no.ip.tdc.net (85.19.121.97)  0.780 ms xe-2-0-0-0.ost-pe1.osl.no.ip.tdc.net (85.19.121.101)  0.713 ms xe-2-0-2-0.ost-pe1.osl.no.ip.tdc.net (85.19.121.97)  0.759 ms
- 6  cpe.xe-0-2-0-100.ost-pe1.osl.no.customer.tdc.net (85.19.26.46)  0.837 ms  0.755 ms  0.759 ms
- 7  95.128.105.3 (95.128.105.3)  1.050 ms  1.288 ms  1.182 ms
- 8  mx03.telecomputing.no (95.128.105.102)  0.717 ms  0.703 ms  0.692 ms
-
---&gt;
+               <title>Fetching trusted timestamps using the rfc3161ng python module</title>
+               <link>http://people.skolelinux.org/pere/blog/Fetching_trusted_timestamps_using_the_rfc3161ng_python_module.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Fetching_trusted_timestamps_using_the_rfc3161ng_python_module.html</guid>
+                <pubDate>Mon, 8 Oct 2018 12:30:00 +0200</pubDate>
+               <description>&lt;p&gt;I have  earlier covered the basics of trusted timestamping using the
+&#39;openssl ts&#39; client.  See blog post for
+&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Public_Trusted_Timestamping_services_for_everyone.html&quot;&gt;2014&lt;/a&gt;,
+&lt;a href=&quot;http://people.skolelinux.org/pere/blog/syslog_trusted_timestamp___chain_of_trusted_timestamps_for_your_syslog.html&quot;&gt;2016&lt;/a&gt;
+and
+&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Idea_for_storing_trusted_timestamps_in_a_Noark_5_archive.html&quot;&gt;2017&lt;/a&gt;
+for those stories.  But some times I want to integrate the timestamping
+in other code, and recently I needed to integrate it into Python.
+After searching a bit, I found
+&lt;a href=&quot;https://dev.entrouvert.org/projects/python-rfc3161&quot;&gt;the
+rfc3161 library&lt;/a&gt; which seemed like a good fit, but I soon
+discovered it only worked for python version 2, and I needed something
+that work with python version 3.  Luckily I next came across
+&lt;a href=&quot;https://github.com/trbs/rfc3161ng/&quot;&gt;the rfc3161ng library&lt;/a&gt;,
+a fork of the original rfc3161 library.  Not only is it working with
+python 3, it have fixed a few of the bugs in the original library, and
+it has an active maintainer.  I decided to wrap it up and make it
+&lt;a href=&quot;https://tracker.debian.org/pkg/python-rfc3161ng&quot;&gt;available in
+Debian&lt;/a&gt;, and a few days ago it entered Debian unstable and testing.&lt;/p&gt;
+
+&lt;p&gt;Using the library is fairly straight forward.  The only slightly
+problematic step is to fetch the required certificates to verify the
+timestamp.  For some services it is straight forward, while for others
+I have not yet figured out how to do it.  Here is a small standalone
+code example based on of the integration tests in the library code:&lt;/p&gt;
+
+&lt;pre&gt;
+#!/usr/bin/python3
+
+&quot;&quot;&quot;
+
+Python 3 script demonstrating how to use the rfc3161ng module to
+get trusted timestamps.
+
+The license of this code is the same as the license of the rfc3161ng
+library, ie MIT/BSD.
+
+&quot;&quot;&quot;
+
+import os
+import pyasn1.codec.der
+import rfc3161ng
+import subprocess
+import tempfile
+import urllib.request
+
+def store(f, data):
+    f.write(data)
+    f.flush()
+    f.seek(0)
+
+def fetch(url, f=None):
+    response = urllib.request.urlopen(url)
+    data = response.read()
+    if f:
+        store(f, data)
+    return data
+
+def main():
+    with tempfile.NamedTemporaryFile() as cert_f,\
+        tempfile.NamedTemporaryFile() as ca_f,\
+        tempfile.NamedTemporaryFile() as msg_f,\
+        tempfile.NamedTemporaryFile() as tsr_f:
+
+        # First fetch certificates used by service
+        certificate_data = fetch(&#39;https://freetsa.org/files/tsa.crt&#39;, cert_f)
+        ca_data_data = fetch(&#39;https://freetsa.org/files/cacert.pem&#39;, ca_f)
+
+        # Then timestamp the message
+        timestamper = \
+            rfc3161ng.RemoteTimestamper(&#39;http://freetsa.org/tsr&#39;,
+                                        certificate=certificate_data)
+        data = b&quot;Python forever!\n&quot;
+        tsr = timestamper(data=data, return_tsr=True)
+
+        # Finally, convert message and response to something &#39;openssl ts&#39; can verify
+        store(msg_f, data)
+        store(tsr_f, pyasn1.codec.der.encoder.encode(tsr))
+        args = [&quot;openssl&quot;, &quot;ts&quot;, &quot;-verify&quot;,
+                &quot;-data&quot;, msg_f.name,
+               &quot;-in&quot;, tsr_f.name,
+               &quot;-CAfile&quot;, ca_f.name,
+                &quot;-untrusted&quot;, cert_f.name]
+        subprocess.check_call(args)
+
+if &#39;__main__&#39; == __name__:
+   main()
+&lt;/pre&gt;
+
+&lt;p&gt;The code fetches the required certificates, store them as temporary
+files, timestamp a simple message, store the message and timestamp to
+disk and ask &#39;openssl ts&#39; to verify the timestamp.  A timestamp is
+around 1.5 kiB in size, and should be fairly easy to store for future
+use.&lt;/p&gt;
+
+&lt;p&gt;As usual, if you use Bitcoin and want to show your support of my
+activities, please send Bitcoin donations to my address
+&lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.&lt;/p&gt;

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

-               <title>First draft Norwegian Bokmål edition of The Debian Administrator&#39;s Handbook now public</title>
-               <link>http://people.skolelinux.org/pere/blog/First_draft_Norwegian_Bokm_l_edition_of_The_Debian_Administrator_s_Handbook_now_public.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/First_draft_Norwegian_Bokm_l_edition_of_The_Debian_Administrator_s_Handbook_now_public.html</guid>
-                <pubDate>Tue, 30 Aug 2016 10:10:00 +0200</pubDate>
-               <description>&lt;p&gt;In April we
-&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Lets_make_a_Norwegian_Bokm_l_edition_of_The_Debian_Administrator_s_Handbook.html&quot;&gt;started
-to work&lt;/a&gt; on a Norwegian Bokmål edition of the &quot;open access&quot; book on
-how to set up and administrate a Debian system.  Today I am happy to
-report that the first draft is now publicly available.  You can find
-it on &lt;a href=&quot;https://debian-handbook.info/get/&quot;&gt;get the Debian
-Administrator&#39;s Handbook page&lt;/a&gt; (under Other languages).  The first
-eight chapters have a first draft translation, and we are working on
-proofreading the content.  If you want to help out, please start
-contributing using
-&lt;a href=&quot;https://hosted.weblate.org/projects/debian-handbook/&quot;&gt;the
-hosted weblate project page&lt;/a&gt;, and get in touch using
-&lt;a href=&quot;http://lists.alioth.debian.org/mailman/listinfo/debian-handbook-translators&quot;&gt;the
-translators mailing list&lt;/a&gt;.  Please also check out
-&lt;a href=&quot;https://debian-handbook.info/contribute/&quot;&gt;the instructions for
-contributors&lt;/a&gt;.  A good way to contribute is to proofread the text
-and update weblate if you find errors.&lt;/p&gt;
-
-&lt;p&gt;Our goal is still to make the Norwegian book available on paper as well as
-electronic form.&lt;/p&gt;
+               <title>Automatic Google Drive sync using grive in Debian</title>
+               <link>http://people.skolelinux.org/pere/blog/Automatic_Google_Drive_sync_using_grive_in_Debian.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Automatic_Google_Drive_sync_using_grive_in_Debian.html</guid>
+                <pubDate>Thu, 4 Oct 2018 15:20:00 +0200</pubDate>
+               <description>&lt;p&gt;A few days, I rescued a Windows victim over to Debian.  To try to
+rescue the remains, I helped set up automatic sync with Google Drive.
+I did not find any sensible Debian package handling this
+automatically, so I rebuild the grive2 source from
+&lt;a href=&quot;http://www.webupd8.org/&quot;&gt;the Ubuntu UPD8 PPA&lt;/a&gt; to do the
+task and added a autostart desktop entry and a small shell script to
+run in the background while the user is logged in to do the sync.
+Here is a sketch of the setup for future reference.&lt;/p&gt;
+
+&lt;p&gt;I first created &lt;tt&gt;~/googledrive&lt;/tt&gt;, entered the directory and
+ran &#39;&lt;tt&gt;grive -a&lt;/tt&gt;&#39; to authenticate the machine/user.  Next, I
+created a autostart hook in &lt;tt&gt;~/.config/autostart/grive.desktop&lt;/tt&gt;
+to start the sync when the user log in:&lt;/p&gt;
+
+&lt;p&gt;&lt;blockquote&gt;&lt;pre&gt;
+[Desktop Entry]
+Name=Google drive autosync
+Type=Application
+Exec=/home/user/bin/grive-sync
+&lt;/pre&gt;&lt;/blockquote&gt;&lt;/p&gt;
+
+&lt;p&gt;Finally, I wrote the &lt;tt&gt;~/bin/grive-sync&lt;/tt&gt; script to sync
+~/googledrive/ with the files in Google Drive.&lt;/p&gt;
+
+&lt;p&gt;&lt;blockquote&gt;&lt;pre&gt;
+#!/bin/sh
+set -e
+cd ~/
+cleanup() {
+    if [ &quot;$syncpid&quot; ] ; then
+        kill $syncpid
+    fi
+}
+trap cleanup EXIT INT QUIT
+/usr/lib/grive/grive-sync.sh listen googledrive 2&gt;&amp;1 | sed &quot;s%^%$0:%&quot; &amp;
+syncpdi=$!
+while true; do
+    if ! xhost &gt;/dev/null 2&gt;&amp;1 ; then
+        echo &quot;no DISPLAY, exiting as the user probably logged out&quot;
+        exit 1
+    fi
+    if [ ! -e /run/user/1000/grive-sync.sh_googledrive ] ; then
+        /usr/lib/grive/grive-sync.sh sync googledrive
+    fi
+    sleep 300
+done 2&gt;&amp;1 | sed &quot;s%^%$0:%&quot;
+&lt;/pre&gt;&lt;/blockquote&gt;&lt;/p&gt;
+
+&lt;p&gt;Feel free to use the setup if you want.  It can be assumed to be
+GNU GPL v2 licensed (or any later version, at your leisure), but I
+doubt this code is possible to claim copyright on.&lt;/p&gt;
+
+&lt;p&gt;As usual, if you use Bitcoin and want to show your support of my
+activities, please send Bitcoin donations to my address
+&lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.&lt;/p&gt;

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

-               <title>Coz can help you find bottlenecks in multi-threaded software - nice free software</title>
-               <link>http://people.skolelinux.org/pere/blog/Coz_can_help_you_find_bottlenecks_in_multi_threaded_software___nice_free_software.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Coz_can_help_you_find_bottlenecks_in_multi_threaded_software___nice_free_software.html</guid>
-                <pubDate>Thu, 11 Aug 2016 12:00:00 +0200</pubDate>
-               <description>&lt;p&gt;This summer, I read a great article
-&quot;&lt;a href=&quot;https://www.usenix.org/publications/login/summer2016/curtsinger&quot;&gt;coz:
-This Is the Profiler You&#39;re Looking For&lt;/a&gt;&quot; in USENIX ;login: about
-how to profile multi-threaded programs.  It presented a system for
-profiling software by running experiences in the running program,
-testing how run time performance is affected by &quot;speeding up&quot; parts of
-the code to various degrees compared to a normal run.  It does this by
-slowing down parallel threads while the &quot;faster up&quot; code is running
-and measure how this affect processing time.  The processing time is
-measured using probes inserted into the code, either using progress
-counters (COZ_PROGRESS) or as latency meters (COZ_BEGIN/COZ_END).  It
-can also measure unmodified code by measuring complete the program
-runtime and running the program several times instead.&lt;/p&gt;
-
-&lt;p&gt;The project and presentation was so inspiring that I would like to
-get the system into Debian.  I
-&lt;a href=&quot;https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=830708&quot;&gt;created
-a WNPP request for it&lt;/a&gt; and contacted upstream to try to make the
-system ready for Debian by sending patches.  The build process need to
-be changed a bit to avoid running &#39;git clone&#39; to get dependencies, and
-to include the JavaScript web page used to visualize the collected
-profiling information included in the source package.
-But I expect that should work out fairly soon.&lt;/p&gt;
-
-&lt;p&gt;The way the system work is fairly simple.  To run an coz experiment
-on a binary with debug symbols available, start the program like this:
+               <title>Valutakrambod - A python and bitcoin love story</title>
+               <link>http://people.skolelinux.org/pere/blog/Valutakrambod___A_python_and_bitcoin_love_story.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Valutakrambod___A_python_and_bitcoin_love_story.html</guid>
+                <pubDate>Sat, 29 Sep 2018 22:20:00 +0200</pubDate>
+               <description>&lt;p&gt;It would come as no surprise to anyone that I am interested in
+bitcoins and virtual currencies.  I&#39;ve been keeping an eye on virtual
+currencies for many years, and it is part of the reason a few months
+ago, I started writing a python library for collecting currency
+exchange rates and trade on virtual currency exchanges.  I decided to
+name the end result valutakrambod, which perhaps can be translated to
+small currency shop.&lt;/p&gt;
+
+&lt;p&gt;The library uses the tornado python library to handle HTTP and
+websocket connections, and provide a asynchronous system for
+connecting to and tracking several services.  The code is available
+from
+&lt;a href=&quot;http://github.com/petterreinholdtsen/valutakrambod&quot;&gt;github&lt;/a&gt;.&lt;/p&gt;
+
+&lt;/p&gt;There are two example clients of the library.  One is very simple and
+list every updated buy/sell price received from the various services.
+This code is started by running bin/btc-rates and call the client code
+in valutakrambod/client.py.  The simple client look like this:&lt;/p&gt;
+
+&lt;p&gt;&lt;blockquote&gt;&lt;pre&gt;
+import functools
+import tornado.ioloop
+import valutakrambod
+class SimpleClient(object):
+    def __init__(self):
+        self.services = []
+        self.streams = []
+        pass
+    def newdata(self, service, pair, changed):
+        print(&quot;%-15s %s-%s: %8.3f %8.3f&quot; % (
+            service.servicename(),
+            pair[0],
+            pair[1],
+            service.rates[pair][&#39;ask&#39;],
+            service.rates[pair][&#39;bid&#39;])
+        )
+    async def refresh(self, service):
+        await service.fetchRates(service.wantedpairs)
+    def run(self):
+        self.ioloop = tornado.ioloop.IOLoop.current()
+        self.services = valutakrambod.service.knownServices()
+        for e in self.services:
+            service = e()
+            service.subscribe(self.newdata)
+            stream = service.websocket()
+            if stream:
+                self.streams.append(stream)
+            else:
+                # Fetch information from non-streaming services immediately
+                self.ioloop.call_later(len(self.services),
+                                       functools.partial(self.refresh, service))
+                # as well as regularly
+                service.periodicUpdate(60)
+        for stream in self.streams:
+            stream.connect()
+        try:
+            self.ioloop.start()
+        except KeyboardInterrupt:
+            print(&quot;Interrupted by keyboard, closing all connections.&quot;)
+            pass
+        for stream in self.streams:
+            stream.close()
+&lt;/pre&gt;&lt;/blockquote&gt;&lt;/p&gt;
+
+&lt;p&gt;The library client loops over all known &quot;public&quot; services,
+initialises it, subscribes to any updates from the service, checks and
+activates websocket streaming if the service provide it, and if no
+streaming is supported, fetches information from the service and sets
+up a periodic update every 60 seconds.  The output from this client
+can look like this:&lt;/p&gt;

 
 &lt;p&gt;&lt;blockquote&gt;&lt;pre&gt;
 
 &lt;p&gt;&lt;blockquote&gt;&lt;pre&gt;

-coz run --- program-to-run
+Bl3p            BTC-EUR: 5687.110 5653.690
+Bl3p            BTC-EUR: 5687.110 5653.690
+Bl3p            BTC-EUR: 5687.110 5653.690
+Hitbtc          BTC-USD: 6594.560 6593.690
+Hitbtc          BTC-USD: 6594.560 6593.690
+Bl3p            BTC-EUR: 5687.110 5653.690
+Hitbtc          BTC-USD: 6594.570 6593.690
+Bitstamp        EUR-USD:    1.159    1.154
+Hitbtc          BTC-USD: 6594.570 6593.690
+Hitbtc          BTC-USD: 6594.580 6593.690
+Hitbtc          BTC-USD: 6594.580 6593.690
+Hitbtc          BTC-USD: 6594.580 6593.690
+Bl3p            BTC-EUR: 5687.110 5653.690
+Paymium         BTC-EUR: 5680.000 5620.240

 &lt;/pre&gt;&lt;/blockquote&gt;&lt;/p&gt;
 
 &lt;/pre&gt;&lt;/blockquote&gt;&lt;/p&gt;
 

-&lt;p&gt;This will create a text file profile.coz with the instrumentation
-information.  To show what part of the code affect the performance
-most, use a web browser and either point it to
-&lt;a href=&quot;http://plasma-umass.github.io/coz/&quot;&gt;http://plasma-umass.github.io/coz/&lt;/a&gt;
-or use the copy from git (in the gh-pages branch).  Check out this web
-site to have a look at several example profiling runs and get an idea what the end result from the profile runs look like.  To make the
-profiling more useful you include &amp;lt;coz.h&amp;gt; and insert the
-COZ_PROGRESS or COZ_BEGIN and COZ_END at appropriate places in the
-code, rebuild and run the profiler.  This allow coz to do more
-targeted experiments.&lt;/p&gt;
-
-&lt;p&gt;A video published by ACM
-&lt;a href=&quot;https://www.youtube.com/watch?v=jE0V-p1odPg&quot;&gt;presenting the
-Coz profiler&lt;/a&gt; is available from Youtube.  There is also a paper
-from the 25th Symposium on Operating Systems Principles available
-titled
-&lt;a href=&quot;https://www.usenix.org/conference/atc16/technical-sessions/presentation/curtsinger&quot;&gt;Coz:
-finding code that counts with causal profiling&lt;/a&gt;.&lt;/p&gt;
-
-&lt;p&gt;&lt;a href=&quot;https://github.com/plasma-umass/coz&quot;&gt;The source code&lt;/a&gt;
-for Coz is available from github.  It will only build with clang
-because it uses a
-&lt;a href=&quot;https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55606&quot;&gt;C++
-feature missing in GCC&lt;/a&gt;, but I&#39;ve submitted
-&lt;a href=&quot;https://github.com/plasma-umass/coz/pull/67&quot;&gt;a patch to solve
-it&lt;/a&gt; and hope it will be included in the upstream source soon.&lt;/p&gt;
-
-&lt;p&gt;Please get in touch if you, like me, would like to see this piece
-of software in Debian.  I would very much like some help with the
-packaging effort, as I lack the in depth knowledge on how to package
-C++ libraries.&lt;/p&gt;
+&lt;p&gt;The exchange order book is tracked in addition to the best buy/sell
+price, for those that need to know the details.&lt;/p&gt;
+
+&lt;p&gt;The other example client is focusing on providing a curses view
+with updated buy/sell prices as soon as they are received from the
+services.  This code is located in bin/btc-rates-curses and activated
+by using the &#39;-c&#39; argument.  Without the argument the &quot;curses&quot; output
+is printed without using curses, which is useful for debugging.  The
+curses view look like this:&lt;/p&gt;
+
+&lt;p&gt;&lt;blockquote&gt;&lt;pre&gt;
+           Name Pair   Bid         Ask         Spr    Ftcd    Age
+ BitcoinsNorway BTCEUR   5591.8400   5711.0800   2.1%   16    nan     60
+       Bitfinex BTCEUR   5671.0000   5671.2000   0.0%   16     22     59
+        Bitmynt BTCEUR   5580.8000   5807.5200   3.9%   16     41     60
+         Bitpay BTCEUR   5663.2700         nan   nan%   15    nan     60
+       Bitstamp BTCEUR   5664.8400   5676.5300   0.2%    0      1      1
+           Bl3p BTCEUR   5653.6900   5684.9400   0.5%    0    nan     19
+       Coinbase BTCEUR   5600.8200   5714.9000   2.0%   15    nan    nan
+         Kraken BTCEUR   5670.1000   5670.2000   0.0%   14     17     60
+        Paymium BTCEUR   5620.0600   5680.0000   1.1%    1   7515    nan
+ BitcoinsNorway BTCNOK  52898.9700  54034.6100   2.1%   16    nan     60
+        Bitmynt BTCNOK  52960.3200  54031.1900   2.0%   16     41     60
+         Bitpay BTCNOK  53477.7833         nan   nan%   16    nan     60
+       Coinbase BTCNOK  52990.3500  54063.0600   2.0%   15    nan    nan
+        MiraiEx BTCNOK  52856.5300  54100.6000   2.3%   16    nan    nan
+ BitcoinsNorway BTCUSD   6495.5300   6631.5400   2.1%   16    nan     60
+       Bitfinex BTCUSD   6590.6000   6590.7000   0.0%   16     23     57
+         Bitpay BTCUSD   6564.1300         nan   nan%   15    nan     60
+       Bitstamp BTCUSD   6561.1400   6565.6200   0.1%    0      2      1
+       Coinbase BTCUSD   6504.0600   6635.9700   2.0%   14    nan    117
+         Gemini BTCUSD   6567.1300   6573.0700   0.1%   16     89    nan
+         Hitbtc+BTCUSD   6592.6200   6594.2100   0.0%    0      0      0
+         Kraken BTCUSD   6565.2000   6570.9000   0.1%   15     17     58
+  Exchangerates EURNOK      9.4665      9.4665   0.0%   16 107789    nan
+     Norgesbank EURNOK      9.4665      9.4665   0.0%   16 107789    nan
+       Bitstamp EURUSD      1.1537      1.1593   0.5%    4      5      1
+  Exchangerates EURUSD      1.1576      1.1576   0.0%   16 107789    nan
+ BitcoinsNorway LTCEUR      1.0000     49.0000  98.0%   16    nan    nan
+ BitcoinsNorway LTCNOK    492.4800    503.7500   2.2%   16    nan     60
+ BitcoinsNorway LTCUSD      1.0221     49.0000  97.9%   15    nan    nan
+     Norgesbank USDNOK      8.1777      8.1777   0.0%   16 107789    nan
+&lt;/pre&gt;&lt;/blockquote&gt;&lt;/p&gt;
+
+&lt;p&gt;The code for this client is too complex for a simple blog post, so
+you will have to check out the git repository to figure out how it
+work.  What I can tell is how the three last numbers on each line
+should be interpreted.  The first is how many seconds ago information
+was received from the service.  The second is how long ago, according
+to the service, the provided information was updated.  The last is an
+estimate on how often the buy/sell values change.&lt;/p&gt;
+
+&lt;p&gt;If you find this library useful, or would like to improve it, I
+would love to hear from you.  Note that for some of the services I&#39;ve
+implemented a trading API.  It might be the topic of a future blog
+post.&lt;/p&gt;
+
+&lt;p&gt;As usual, if you use Bitcoin and want to show your support of my
+activities, please send Bitcoin donations to my address
+&lt;b&gt;&lt;a href=&quot;bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&quot;&gt;15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&lt;/a&gt;&lt;/b&gt;.&lt;/p&gt;

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