X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/9da2199ce9673d2aeb21f64f6245c9dc4739fb60..aa4069048e4b39f85304deb4c9abc90695b8441c:/blog/index.rss diff --git a/blog/index.rss b/blog/index.rss index bed861033f..e42e39614e 100644 --- a/blog/index.rss +++ b/blog/index.rss @@ -7,831 +7,634 @@ - Do you need an agreement with MPEG-LA to publish and broadcast H.264 video in Norway? - http://people.skolelinux.org/pere/blog/Do_you_need_an_agreement_with_MPEG_LA_to_publish_and_broadcast_H_264_video_in_Norway_.html - http://people.skolelinux.org/pere/blog/Do_you_need_an_agreement_with_MPEG_LA_to_publish_and_broadcast_H_264_video_in_Norway_.html - Mon, 25 Aug 2014 22:10:00 +0200 - <p>Two years later, I am still not sure if it is legal here in Norway -to use or publish a video in H.264 or MPEG4 format edited by the -commercially licensed video editors, without limiting the use to -create "personal" or "non-commercial" videos or get a license -agreement with <a href="http://www.mpegla.com">MPEG LA</a>. If one -want to publish and broadcast video in a non-personal or commercial -setting, it might be that those tools can not be used, or that video -format can not be used, without breaking their copyright license. I -am not sure. -<a href="http://people.skolelinux.org/pere/blog/Trenger_en_avtale_med_MPEG_LA_for___publisere_og_kringkaste_H_264_video_.html">Back -then</a>, I found that the copyright license terms for Adobe Premiere -and Apple Final Cut Pro both specified that one could not use the -program to produce anything else without a patent license from MPEG -LA. The issue is not limited to those two products, though. Other -much used products like those from Avid and Sorenson Media have terms -of use are similar to those from Adobe and Apple. The complicating -factor making me unsure if those terms have effect in Norway or not is -that the patents in question are not valid in Norway, but copyright -licenses are.</p> - -<p>These are the terms for Avid Artist Suite, according to their -<a href="http://www.avid.com/US/about-avid/legal-notices/legal-enduserlicense2">published -end user</a> -<a href="http://www.avid.com/static/resources/common/documents/corporate/LICENSE.pdf">license -text</a> (converted to lower case text for easier reading):</p> + Idea for storing trusted timestamps in a Noark 5 archive + http://people.skolelinux.org/pere/blog/Idea_for_storing_trusted_timestamps_in_a_Noark_5_archive.html + http://people.skolelinux.org/pere/blog/Idea_for_storing_trusted_timestamps_in_a_Noark_5_archive.html + Wed, 7 Jun 2017 21:40:00 +0200 + <p><em>This is a copy of +<a href="https://lists.nuug.no/pipermail/nikita-noark/2017-June/000297.html">an +email I posted to the nikita-noark mailing list</a>. Please follow up +there if you would like to discuss this topic. The background is that +we are making a free software archive system based on the Norwegian +<a href="https://www.arkivverket.no/forvaltning-og-utvikling/regelverk-og-standarder/noark-standarden">Noark +5 standard</a> for government archives.</em></p> + +<p>I've been wondering a bit lately how trusted timestamps could be +stored in Noark 5. +<a href="https://en.wikipedia.org/wiki/Trusted_timestamping">Trusted +timestamps</a> can be used to verify that some information +(document/file/checksum/metadata) have not been changed since a +specific time in the past. This is useful to verify the integrity of +the documents in the archive.</p> + +<p>Then it occured to me, perhaps the trusted timestamps could be +stored as dokument variants (ie dokumentobjekt referered to from +dokumentbeskrivelse) with the filename set to the hash it is +stamping?</p> + +<p>Given a "dokumentbeskrivelse" with an associated "dokumentobjekt", +a new dokumentobjekt is associated with "dokumentbeskrivelse" with the +same attributes as the stamped dokumentobjekt except these +attributes:</p> -<p><blockquote> -<p>18.2. MPEG-4. MPEG-4 technology may be included with the -software. MPEG LA, L.L.C. requires this notice: </p> - -<p>This product is licensed under the MPEG-4 visual patent portfolio -license for the personal and non-commercial use of a consumer for (i) -encoding video in compliance with the MPEG-4 visual standard (“MPEG-4 -video”) and/or (ii) decoding MPEG-4 video that was encoded by a -consumer engaged in a personal and non-commercial activity and/or was -obtained from a video provider licensed by MPEG LA to provide MPEG-4 -video. No license is granted or shall be implied for any other -use. Additional information including that relating to promotional, -internal and commercial uses and licensing may be obtained from MPEG -LA, LLC. See http://www.mpegla.com. This product is licensed under -the MPEG-4 systems patent portfolio license for encoding in compliance -with the MPEG-4 systems standard, except that an additional license -and payment of royalties are necessary for encoding in connection with -(i) data stored or replicated in physical media which is paid for on a -title by title basis and/or (ii) data which is paid for on a title by -title basis and is transmitted to an end user for permanent storage -and/or use, such additional license may be obtained from MPEG LA, -LLC. See http://www.mpegla.com for additional details.</p> - -<p>18.3. H.264/AVC. H.264/AVC technology may be included with the -software. MPEG LA, L.L.C. requires this notice:</p> - -<p>This product is licensed under the AVC patent portfolio license for -the personal use of a consumer or other uses in which it does not -receive remuneration to (i) encode video in compliance with the AVC -standard (“AVC video”) and/or (ii) decode AVC video that was encoded -by a consumer engaged in a personal activity and/or was obtained from -a video provider licensed to provide AVC video. No license is granted -or shall be implied for any other use. Additional information may be -obtained from MPEG LA, L.L.C. See http://www.mpegla.com.</p> -</blockquote></p> +<ul> -<p>Note the requirement that the videos created can only be used for -personal or non-commercial purposes.</p> +<li>format -> "RFC3161" +<li>mimeType -> "application/timestamp-reply" +<li>formatDetaljer -> "&lt;source URL for timestamp service&gt;" +<li>filenavn -> "&lt;sjekksum&gt;.tsr" -<p>The Sorenson Media software have -<a href="http://www.sorensonmedia.com/terms/">similar terms</a>:</p> +</ul> -<p><blockquote> +<p>This assume a service following +<a href="https://tools.ietf.org/html/rfc3161">IETF RFC 3161</a> is +used, which specifiy the given MIME type for replies and the .tsr file +ending for the content of such trusted timestamp. As far as I can +tell from the Noark 5 specifications, it is OK to have several +variants/renderings of a dokument attached to a given +dokumentbeskrivelse objekt. It might be stretching it a bit to make +some of these variants represent crypto-signatures useful for +verifying the document integrity instead of representing the dokument +itself.</p> + +<p>Using the source of the service in formatDetaljer allow several +timestamping services to be used. This is useful to spread the risk +of key compromise over several organisations. It would only be a +problem to trust the timestamps if all of the organisations are +compromised.</p> + +<p>The following oneliner on Linux can be used to generate the tsr +file. $input is the path to the file to checksum, and $sha256 is the +SHA-256 checksum of the file (ie the "<sjekksum>.tsr" value mentioned +above).</p> + +<p><blockquote><pre> +openssl ts -query -data "$inputfile" -cert -sha256 -no_nonce \ + | curl -s -H "Content-Type: application/timestamp-query" \ + --data-binary "@-" http://zeitstempel.dfn.de > $sha256.tsr +</pre></blockquote></p> -<p>With respect to a license from Sorenson pertaining to MPEG-4 Video -Decoders and/or Encoders: Any such product is licensed under the -MPEG-4 visual patent portfolio license for the personal and -non-commercial use of a consumer for (i) encoding video in compliance -with the MPEG-4 visual standard (“MPEG-4 video”) and/or (ii) decoding -MPEG-4 video that was encoded by a consumer engaged in a personal and -non-commercial activity and/or was obtained from a video provider -licensed by MPEG LA to provide MPEG-4 video. No license is granted or -shall be implied for any other use. Additional information including -that relating to promotional, internal and commercial uses and -licensing may be obtained from MPEG LA, LLC. See -http://www.mpegla.com.</p> - -<p>With respect to a license from Sorenson pertaining to MPEG-4 -Consumer Recorded Data Encoder, MPEG-4 Systems Internet Data Encoder, -MPEG-4 Mobile Data Encoder, and/or MPEG-4 Unique Use Encoder: Any such -product is licensed under the MPEG-4 systems patent portfolio license -for encoding in compliance with the MPEG-4 systems standard, except -that an additional license and payment of royalties are necessary for -encoding in connection with (i) data stored or replicated in physical -media which is paid for on a title by title basis and/or (ii) data -which is paid for on a title by title basis and is transmitted to an -end user for permanent storage and/or use. Such additional license may -be obtained from MPEG LA, LLC. See http://www.mpegla.com for -additional details.</p> +<p>To verify the timestamp, you first need to download the public key +of the trusted timestamp service, for example using this command:</p> -</blockquote></p> +<p><blockquote><pre> +wget -O ca-cert.txt \ + https://pki.pca.dfn.de/global-services-ca/pub/cacert/chain.txt +</pre></blockquote></p> + +<p>Note, the public key should be stored alongside the timestamps in +the archive to make sure it is also available 100 years from now. It +is probably a good idea to standardise how and were to store such +public keys, to make it easier to find for those trying to verify +documents 100 or 1000 years from now. :)</p> + +<p>The verification itself is a simple openssl command:</p> + +<p><blockquote><pre> +openssl ts -verify -data $inputfile -in $sha256.tsr \ + -CAfile ca-cert.txt -text +</pre></blockquote></p> -<p>Some free software like -<a href="https://handbrake.fr/">Handbrake</A> and -<a href="http://ffmpeg.org/">FFMPEG</a> uses GPL/LGPL licenses and do -not have any such terms included, so for those, there is no -requirement to limit the use to personal and non-commercial.</p> +<p>Is there any reason this approach would not work? Is it somehow against +the Noark 5 specification?</p> - Lenker for 2014-08-03 - http://people.skolelinux.org/pere/blog/Lenker_for_2014_08_03.html - http://people.skolelinux.org/pere/blog/Lenker_for_2014_08_03.html - Sun, 3 Aug 2014 23:00:00 +0200 - <p>Lenge siden jeg har hatt tid til å publisere lenker til skriverier -jeg har hatt glede og nytte av av å lese. Her er en liten norsk -lenkesamling.</p> - -<p><ul> - -<li><a href="http://www.nrk.no/ytring/sjoslag-om-fiskemilliardene-1.11576109">Sjøslag -om fiskemilliardene</a> (NRK Ytring 2014-03-03) - litt om hvordan de -norske felles matressurser røves fra felleskapet.</li> - -<li><a href="http://www.aftenposten.no/nyheter/Matkrisen-kan-komme-til-Norge-7522341.html">Matkrisen -kan komme til Norge</a> (Aftenposten 2014-4-01) - hvordan miljøendringene vil gjøre matproduksjonen i Norge mer sårbar.</li> - -<li><a href="http://www.nrk.no/ytring/norge-trenger-kornlager-1.11726744">Norge -trenger kornlager</a> (NRK Ytring 2014-06-07) Chr. Anton Smedshaug -forteller litt om Norges sårbare matsituasjon etter at Staten solgte -Norges kornlager.</li> - -<li><a href="http://www.nrk.no/norge/pst-vil-overvake-datatastaturer-1.11583286">PST -vil overvåke datatastaturer</a> (NRK 2014-03-04) - PST ønsker retten -til å bryte seg inn på private PC-er og legge inn spionprogrammer. -Hvilket nok vil gjøre Linux mer populært, men gjør at en i enda mindre -grad enn i dag kan stole på datamaskiner - neppe en god ide for -samfunnet totalt sett.</li> - -<li><a href="http://www.osloby.no/nyheter/Ruter-fremstar-som-et-pobelvelde-7490624.html">«Ruter -fremstår som et pøbelvelde»</a> (OsloBy 2014-03-05) - et eksempel på -hvordan kollektivtransportselskapet i Oslo håndterer sine kunder.</li> - -<li><a href="http://www.dagbladet.no/2014/03/05/nyheter/dbtv/reklame/clear_channel/32123808/">Clear -Channel nektet å vise Greenpeace-reklame i Oslo</a> (Dagbladet -2014-03-05) - forteller litt om hvordan hvilke budskap som når ut i -det offentlige rom kontrolleres i Norge.</li> - -<li><a href="http://www.dagbladet.no/2014/03/06/kultur/meninger/debattinnlegg/kronikk/22_juli/32175854/">Svarte -ikke på kritikken</a> (Dagbladet 2014-03-06) - innlegg fra Norsk -presseforbund der de nok en gang tar opp det forkastelige i at -politiet nå har full tilgang til å bedrive telefonkontroll av -advokater.</li> - -<li><a href="http://www.aftenposten.no/nyheter/uriks/Putin-spiller-poker_-ikke-sjakk-I-sjakk-har-man-regler-7495368.html">«Putin -spiller poker, ikke sjakk. I sjakk har man regler.»</a> (Aftenposten -2014-03-08) - sjakklegenden Kasparov forklarer litt om hvordan han ser -at Russlands politikk fungerer, blant annet i lys av started av -Ukraina-krisen.</li> - -<li><a href="http://www.aftenposten.no/meninger/kronikker/I-seng-med-fienden-7492605.html">I -seng med fienden</a> (Aftenposten 2014-03-10) - kronikk fra Eirik -H. Vinje om hvordan menn og kvinner settes opp mot hverandre i det -offentlige ordskiftet, kanskje på sviktende grunnlag.</li> - -<li><a href="http://www.aftenposten.no/amagasinet/Hvor-er-elevene-7501690.html">Fritt -frem for skulk</a> (Aftenposten 2014-03-14) - skildring av hvordan -norske elever i dag ikke lenger har rimelig krav om oppmøte på -skolen.</li> - -<li><a href="http://www.aftenposten.no/digital/Datalagringsdirektiv-avslorte-abort_-sykdom-og-vapenkjop--7503014.html">«Datalagringsdirektiv» -avslørte abort, sykdom og våpenkjøp</a> (Aftenposten 2014-03-14) - om -hvordan forskere har dokumentert hvordan innsamling av metadata om -telefoni og Internett-bruk kan være svært avslørende.</li> - -<li><a href="http://www.dagbladet.no/2014/03/14/kultur/meninger/ideer/lordagskommentaren/agnes_ravatn/32302856/">Konsentrasjonssvikt -på pensum</a> (Dagbladet 2014-03-14) - Kommentar om hvordan (feil) -bruk IKT i skolen kan ødelegge mer enn det bidrar til læring.</li> - -<li><a href="http://doremusnor.wordpress.com/2014/02/09/reservasjonsrettsstaten/">Reservasjonsrettsstaten</a> -(blogg fra Doremus 2014-02-09) - morsom beskrivelse om hvordan -regjeringens forslag til reservasjonsrett for leger kan utvides til å -gjelde alles samvittighet.</li> - -<li><a href="http://www.aftenposten.no/meninger/kronikker/Autoritar-gjokunge-7514915.html">Autoritær -gjøkunge</a> (Aftenposten 2014-03-25) - Kronikk av Bjørn Stærk om -snurpenots-overvåkningen som varsleren Snowden dokumenterte.</li> - -<li><a href="http://blogg.friprog.no/2014/03/leveransekrise-i-offentlig-sektor-mener-mike-bracken-executive-director-of-digital-in-the-cabinet-office/">Leveransekrise -i Offentlig sektor – mener Mike Bracken, Executive Director of Digital -in the Cabinet Office</a> (blogg fra Friprog-senteret 2014-03-26).</li> - -<li><a href="http://www.dagbladet.no/2014/03/26/kultur/meninger/kronikk/etiopia/avlytting/32499687/">Norge -må stanse avlyttingen</a> (Dagbladet 2014-03-26) - leserinnlegg fra -Felix Horne der han ber om at Norge gjør en innsats for å få slutt på -overvåkning av innbyggerne som gjøres i Norge av Etiopiske -myndigheter.</li> - -<li><a href="http://www.aftenposten.no/meninger/kronikker/Demokrati-er-ingen-naturlig-styreform-7521957.html">Demokrati -er ingen naturlig styreform</a> (Aftenposten 2014-04-01) - kronikk av -Stein Ringen om hvordan demokrati som styreform går tapt når -innbyggerne tar det for gitt.</li> - -<li><a href="http://www.nrk.no/ytring/ytringsansvar-ere-enhver-tilladte_-1.11618934">Ytringsansvar -ere Enhver tilladte!</a> (NRK Ytring 2014-04-01) - innspill fra Trygve -Svensson og Helge Svare om at hver enkelt av oss har et ansvar for å -ytre oss i den offentlige debatten.</li> - -<li><a href="http://www.aftenposten.no/meninger/Jeg-er-ingen-god-samfunnsborger-7527128.html">Jeg -er ingen god samfunnsborger</a> (Aftenposten 2014-04-16), kronikk av -Simen Tveitereid om alternative måter å motiveres i samfunnet, uten å -hige etter mer penger og flere ting.</li> - -<li><a href="http://www.aftenposten.no/meninger/debatt/Avgjorelsen-far-umiddelbar-virkning-7531811.html">DLD-dommen: -Avgjørelsen får umiddelbar virkning</a> (Aftenposten 2014-04-10) - -kronikk av Høyres Michael Tetzschner, en partiutbryter i DLD-saken som -stemte nei til DLD i Stortinget i 2011.</li> - -<li><a href="http://www.uhuru.biz/?p=1466">Datalagringsdirektivets -endelikt</a> (blogg fra John Wessel-Aas 2014-04-11) - oppsummering -av hvordan direktivet ble funnet ugyldig i EU-domstolen.</li> - -<li><a href="http://www.vg.no/nyheter/meninger/kronikk-kapitulasjonspresidenten/a/10147713/">Kronikk: -Kapitulasjonspresidenten</a> (VG 2014-04-22) - kronikk av Einar -Kr. Steffenak om hvordan Stortingspresidenten og regjeringen viser sin -prinsippløshet i møte med Kina.</li> - -<li><a href="http://www.aftenposten.no/meninger/kronikker/Innerst-inne-er-alle-nordmenn-7542617.html">Innerst -inne er alle nordmenn</a> (Aftenposten 2014-04-27) - kronikk fra Bjørn -Stærk om hvordan vi i Vesten i stor grad baserer oss på en fantasi om -at alle i verden bærer på en drøm om å bli som oss.</li> - -<li><a href="http://www.aftenposten.no/viten/uviten/Det-italienske-senatet-gav-seg-selv-134-milliarder-euro-i-sluttpakke--7575312.html">Det -italienske senatet gav seg selv 134 milliarder euro i sluttpakke</a> -(Aftenposten 2014-06-19) - forsker Simen Gaure forteller hvordan -løgner og fantasi fra nettkilder i stor grad blir akseptert som -sannhet - antagelig også av deg og meg.</li> - -<li><a href="http://www.dagbladet.no/2014/05/30/kultur/meninger/kronikk/skole/33576392/">Et -forsvar for bråkmakerne</a> (Dagbladet 2014-05-30) - kronikk av Dag -Øystein Nome som beskriver hvordan dagens skole ikke fungerer så godt -for mange elever.</li> - -<li><a href="http://www.osloby.no/nyheter/Betalte-med-slitt-seddel---havnet-i-arresten-7617208.html">Betalte -med slitt seddel - havnet i arresten</a> (Osloby 2014-06-25)) - -dokumentasjon av Oslopolitiets angrep på vår alles rett til å ferdes -uten elektronisk sporing. Jeg bruker kontanter i så stor grad som -mulig da banken ikke har noe med hvor jeg er og hva jeg kjøper. Vi -som gjør dette risikerer som beskrevet overgrep som frihetsberøvelse -og registrering og lagring av fingeravtrykk og bilde i politiets -database over mistenkte.</li> - -<li><a href="http://www.aftenposten.no/meninger/leder/Fredsprisen-til-Snowden-7620422.html">Fredsprisen -til Snowden</a> (Aftenposten 2014-06-28) - leder som forklarer hvorfor -varsleren Snowden bør få fredsprisen.</li> - -<li><a href="http://www.dagbladet.no/2014/08/01/kultur/meninger/dbmener/leder1/34598010/">Strategi -for politistaten</a> (Dagbladet 2014-08-01) - leder som advarer om -sterke krefter som bruker terrortrusselen til å lirke Norge nærmere å -bli en politistat.</li> - -<li><a href="http://www.nrk.no/ytring/vi-ma-tenke-nytt-om-narkotika-1.11859322">Vi -må tenke nytt om narkotika</a> (NRK Ytring 2014-08-03) - Mark Lewis -forklarer hvorfor legalisering og offentlig kontroll av -narkotikamarkedet er mye bedre enn å overlate det til kriminelle.</li> - - -</ul></p> + Når nynorskoversettelsen svikter til eksamen... + http://people.skolelinux.org/pere/blog/N_r_nynorskoversettelsen_svikter_til_eksamen___.html + http://people.skolelinux.org/pere/blog/N_r_nynorskoversettelsen_svikter_til_eksamen___.html + Sat, 3 Jun 2017 08:20:00 +0200 + <p><a href="http://www.aftenposten.no/norge/Krever-at-elever-ma-fa-annullert-eksamen-etter-rot-med-oppgavetekster-622459b.html">Aftenposten +melder i dag</a> om feil i eksamensoppgavene for eksamen i politikk og +menneskerettigheter, der teksten i bokmåls og nynorskutgaven ikke var +like. Oppgaveteksten er gjengitt i artikkelen, og jeg ble nysgjerring +på om den fri oversetterløsningen +<a href="https://www.apertium.org/">Apertium</a> ville gjort en bedre +jobb enn Utdanningsdirektoratet. Det kan se slik ut.</p> + +<p>Her er bokmålsoppgaven fra eksamenen:</p> + +<blockquote> +<p>Drøft utfordringene knyttet til nasjonalstatenes og andre aktørers +rolle og muligheter til å håndtere internasjonale utfordringer, som +for eksempel flykningekrisen.</p> + +<p>Vedlegge er eksempler på tekster som kan gi relevante perspektiver +på temaet:</p> +<ol> +<li>Flykningeregnskapet 2016, UNHCR og IDMC +<li>«Grenseløst Europa for fall» A-Magasinet, 26. november 2015 +</ol> + +</blockquote> + +<p>Dette oversetter Apertium slik:</p> + +<blockquote> +<p>Drøft utfordringane knytte til nasjonalstatane sine og rolla til +andre aktørar og høve til å handtera internasjonale utfordringar, som +til dømes *flykningekrisen.</p> + +<p>Vedleggja er døme på tekster som kan gje relevante perspektiv på +temaet:</p> + +<ol> +<li>*Flykningeregnskapet 2016, *UNHCR og *IDMC</li> +<li>«*Grenseløst Europa for fall» A-Magasinet, 26. november 2015</li> +</ol> + +</blockquote> + +<p>Ord som ikke ble forstått er markert med stjerne (*), og trenger +ekstra språksjekk. Men ingen ord er forsvunnet, slik det var i +oppgaven elevene fikk presentert på eksamen. Jeg mistenker dog at +"andre aktørers rolle og muligheter til ..." burde vært oversatt til +"rolla til andre aktørar og deira høve til ..." eller noe slikt, men +det er kanskje flisespikking. Det understreker vel bare at det alltid +trengs korrekturlesning etter automatisk oversettelse.</p> - Debian Edu interview: Bernd Zeitzen - http://people.skolelinux.org/pere/blog/Debian_Edu_interview__Bernd_Zeitzen.html - http://people.skolelinux.org/pere/blog/Debian_Edu_interview__Bernd_Zeitzen.html - Thu, 31 Jul 2014 08:30:00 +0200 - <p>The complete and free “out of the box” software solution for -schools, <a href="http://www.skolelinux.org/">Debian Edu / -Skolelinux</a>, is used quite a lot in Germany, and one of the people -involved is Bernd Zeitzen, who show up on the project mailing lists -from time to time with interesting questions and tips on how to adjust -the setup. I managed to interview him this summer.</p> - -<p><strong>Who are you, and how do you spend your days?</strong></p> - -<p>My name is Bernd Zeitzen and I'm married with Hedda, a self -employed physiotherapist. My former profession is tool maker, but I -haven't worked for 30 years in this job. 30 years ago I started to -support my wife and become her officeworker and a few years later the -administrator for a small computer network, today based on Ubuntu -Server (Samba, OpenVPN). For her daily work she has to use Windows -Desktops because the software she needs to organize her business only -works with Windows . :-(</p> - -<p>In 1988 we started with one PC and DOS, then I learned to use -Windows 98, 2000, XP, …, 8, Ubuntu, MacOSX. Today we are running a -Linux server with 6 Windows clients and 10 persons (teacher of -children with special needs, speech therapist, occupational therapist, -psychologist and officeworkers) using our Samba shares via OpenVPN to -work with the documentations of our patients.</p> - -<p><strong>How did you get in contact with the Skolelinux / Debian Edu -project?</strong></p> - -<p>Two years ago a friend of mine asked me, if I want to get a job in -his school (<a href="http://www.gymnasium-harsewinkel.de/">Gymnasium -Harsewinkel</a>). They started with Skolelinux / Debian Edu and they -were looking for people to give support to the teachers using the -software and the network and teaching the pupils increasing their -computer skills in optional lessons. I'm spending 4-6 hours a week -with this job.</p> - -<p><strong>What do you see as the advantages of Skolelinux / Debian -Edu?</strong></p> - -<p>The independence.</p> - -<p>First: Every person is allowed to use, share and develop the -software. Even if you are poor, you are allowed to use the software -included in Skolelinux/Debian Edu and all the other Free Software.</p> - -<p>Second: The software runs on old machines and this gives us the -possibility to recycle computers, weeded out from offices. The -servers and desktops are running for more than two years and they are -working reliable. </p> - -<p>We have two servers (one tjener and one terminal server), 45 -workstations in three classrooms and seven laptops as a mobile -solution for all classrooms. These machines are all booting from the -terminal server. In the moment we are installing 30 laptops as mobile -workstations. Then the pupils have the possibility to work with these -machines in their classrooms. Internet access is realized by a WLAN -router, connected to the schools network. This is all done without a -dedicated system administrator or a computer science teacher.</p> - -<p><strong>What do you see as the disadvantages of Skolelinux / Debian -Edu?</strong></p> - -<p>Teachers and pupils are Windows users. &lt;Irony on&gt; And Linux -isn't cool. It's software for freaks using the command line. &lt;Irony -off&gt; They don't realize the stability of the system. </p> - -<p><strong>Which free software do you use daily?</strong></p> - -<p>Firefox, Thunderbird, LibreOffice, Ubuntu Server 12.04 (Samba, -Apache, MySQL, Joomla!, … and Skolelinux / Debian Edu)</p> - -<p><strong>Which strategy do you believe is the right one to use to -get schools to use free software?</strong></p> - -<p>In Germany we have the situation: every school is free to decide -which software they want to use. This decision is influenced by -teachers who learned to use Windows and MS Office. They buy a PC with -Windows preinstalled and an additional testing version of MS -Office. They don't know about the possibility to use Free Software -instead. Another problem are the publisher of school books. They -develop their software, added to the school books, for Windows.</p> + Epost inn som arkivformat i Riksarkivarens forskrift? + http://people.skolelinux.org/pere/blog/Epost_inn_som_arkivformat_i_Riksarkivarens_forskrift_.html + http://people.skolelinux.org/pere/blog/Epost_inn_som_arkivformat_i_Riksarkivarens_forskrift_.html + Thu, 27 Apr 2017 11:30:00 +0200 + <p>I disse dager, med frist 1. mai, har Riksarkivaren ute en høring på +sin forskrift. Som en kan se er det ikke mye tid igjen før fristen +som går ut på søndag. Denne forskriften er det som lister opp hvilke +formater det er greit å arkivere i +<a href="http://www.arkivverket.no/arkivverket/Offentleg-forvalting/Noark/Noark-5">Noark +5-løsninger</a> i Norge.</p> + +<p>Jeg fant høringsdokumentene hos +<a href="https://www.arkivrad.no/aktuelt/riksarkivarens-forskrift-pa-horing">Norsk +Arkivråd</a> etter å ha blitt tipset på epostlisten til +<a href="https://github.com/hiOA-ABI/nikita-noark5-core">fri +programvareprosjektet Nikita Noark5-Core</a>, som lager et Noark 5 +Tjenestegresesnitt. Jeg er involvert i Nikita-prosjektet og takket +være min interesse for tjenestegrensesnittsprosjektet har jeg lest en +god del Noark 5-relaterte dokumenter, og til min overraskelse oppdaget +at standard epost ikke er på listen over godkjente formater som kan +arkiveres. Høringen med frist søndag er en glimrende mulighet til å +forsøke å gjøre noe med det. Jeg holder på med +<a href="https://github.com/petterreinholdtsen/noark5-tester/blob/master/docs/hoering-arkivforskrift.tex">egen +høringsuttalelse</a>, og lurer på om andre er interessert i å støtte +forslaget om å tillate arkivering av epost som epost i arkivet.</p> + +<p>Er du igang med å skrive egen høringsuttalelse allerede? I så fall +kan du jo vurdere å ta med en formulering om epost-lagring. Jeg tror +ikke det trengs så mye. Her et kort forslag til tekst:</p> + +<p><blockquote> + + <p>Viser til høring sendt ut 2017-02-17 (Riksarkivarens referanse + 2016/9840 HELHJO), og tillater oss å sende inn noen innspill om + revisjon av Forskrift om utfyllende tekniske og arkivfaglige + bestemmelser om behandling av offentlige arkiver (Riksarkivarens + forskrift).</p> + + <p>Svært mye av vår kommuikasjon foregår i dag på e-post.  Vi + foreslår derfor at Internett-e-post, slik det er beskrevet i IETF + RFC 5322, + <a href="https://tools.ietf.org/html/rfc5322">https://tools.ietf.org/html/rfc5322</a>. bør + inn som godkjent dokumentformat.  Vi foreslår at forskriftens + oversikt over godkjente dokumentformater ved innlevering i § 5-16 + endres til å ta med Internett-e-post.</p> + +</blockquote></p> + +<p>Som del av arbeidet med tjenestegrensesnitt har vi testet hvordan +epost kan lagres i en Noark 5-struktur, og holder på å skrive et +forslag om hvordan dette kan gjøres som vil bli sendt over til +arkivverket så snart det er ferdig. De som er interesserte kan +<a href="https://github.com/petterreinholdtsen/noark5-tester/blob/master/docs/epostlagring.md">følge +fremdriften på web</a>.</p> + +<p>Oppdatering 2017-04-28: I dag ble høringuttalelsen jeg skrev + <a href="https://www.nuug.no/news/NUUGs_h_ringuttalelse_til_Riksarkivarens_forskrift.shtml">sendt + inn av foreningen NUUG</a>.</p> - 98.6 percent done with the Norwegian draft translation of Free Culture - http://people.skolelinux.org/pere/blog/98_6_percent_done_with_the_Norwegian_draft_translation_of_Free_Culture.html - http://people.skolelinux.org/pere/blog/98_6_percent_done_with_the_Norwegian_draft_translation_of_Free_Culture.html - Wed, 23 Jul 2014 22:40:00 +0200 - <p>This summer I finally had time to continue working on the Norwegian -<a href="http://www.docbook.org/">docbook</a> version of the 2004 book -<a href="http://free-culture.cc/">Free Culture</a> by Lawrence Lessig, -to get a Norwegian text explaining the problems with todays copyright -law. Yesterday, I finally completed translated the book text. There -are still some foot/end notes left to translate, the colophon page -need to be rewritten, and a few words and phrases still need to be -translated, but the Norwegian text is ready for the first proof -reading. :) More spell checking is needed, and several illustrations -need to be cleaned up. The work stopped up because I had to give -priority to other projects the last year, and the progress graph of -the translation show this very well:</p> - -<p><img width="80%" align="center" src="https://github.com/petterreinholdtsen/free-culture-lessig/raw/master/progress.png"></p> - -<p>If you want to read the result, check out the -<a href="https://github.com/petterreinholdtsen/free-culture-lessig">github</a> -project pages and the -<a href="https://github.com/petterreinholdtsen/free-culture-lessig/blob/master/archive/freeculture.nb.pdf?raw=true">PDF</a>, -<a href="https://github.com/petterreinholdtsen/free-culture-lessig/blob/master/archive/freeculture.nb.epub?raw=true">EPUB</a> -and HTML version available in the -<a href="https://github.com/petterreinholdtsen/free-culture-lessig/tree/master/archive">archive -directory</a>.</p> - -<p>Please report typos, bugs and improvements to the github project if -you find any.</p> + Offentlig elektronisk postjournal blokkerer tilgang for utvalgte webklienter + http://people.skolelinux.org/pere/blog/Offentlig_elektronisk_postjournal_blokkerer_tilgang_for_utvalgte_webklienter.html + http://people.skolelinux.org/pere/blog/Offentlig_elektronisk_postjournal_blokkerer_tilgang_for_utvalgte_webklienter.html + Thu, 20 Apr 2017 13:00:00 +0200 + <p>Jeg oppdaget i dag at <a href="https://www.oep.no/">nettstedet som +publiserer offentlige postjournaler fra statlige etater</a>, OEP, har +begynt å blokkerer enkelte typer webklienter fra å få tilgang. Vet +ikke hvor mange det gjelder, men det gjelder i hvert fall libwww-perl +og curl. For å teste selv, kjør følgende:</p> + +<blockquote><pre> +% curl -v -s https://www.oep.no/pub/report.xhtml?reportId=3 2>&1 |grep '< HTTP' +< HTTP/1.1 404 Not Found +% curl -v -s --header 'User-Agent:Opera/12.0' https://www.oep.no/pub/report.xhtml?reportId=3 2>&1 |grep '< HTTP' +< HTTP/1.1 200 OK +% +</pre></blockquote> + +<p>Her kan en se at tjenesten gir «404 Not Found» for curl i +standardoppsettet, mens den gir «200 OK» hvis curl hevder å være Opera +versjon 12.0. Offentlig elektronisk postjournal startet blokkeringen +2017-03-02.</p> + +<p>Blokkeringen vil gjøre det litt vanskeligere å maskinelt hente +informasjon fra oep.no. Kan blokkeringen være gjort for å hindre +automatisert innsamling av informasjon fra OEP, slik Pressens +Offentlighetsutvalg gjorde for å dokumentere hvordan departementene +hindrer innsyn i +<a href="http://presse.no/dette-mener-np/undergraver-offentlighetsloven/">rapporten +«Slik hindrer departementer innsyn» som ble publiserte i januar +2017</a>. Det virker usannsynlig, da det jo er trivielt å bytte +User-Agent til noe nytt.</p> + +<p>Finnes det juridisk grunnlag for det offentlige å diskriminere +webklienter slik det gjøres her? Der tilgang gis eller ikke alt etter +hva klienten sier at den heter? Da OEP eies av DIFI og driftes av +Basefarm, finnes det kanskje noen dokumenter sendt mellom disse to +aktørene man kan be om innsyn i for å forstå hva som har skjedd. Men +<a href="https://www.oep.no/search/result.html?period=dateRange&fromDate=01.01.2016&toDate=01.04.2017&dateType=documentDate&caseDescription=&descType=both&caseNumber=&documentNumber=&sender=basefarm&senderType=both&documentType=all&legalAuthority=&archiveCode=&list2=196&searchType=advanced&Search=Search+in+records">postjournalen +til DIFI viser kun to dokumenter</a> det siste året mellom DIFI og +Basefarm. +<a href="https://www.mimesbronn.no/request/blokkering_av_tilgang_til_oep_fo">Mimes brønn neste</a>, +tenker jeg.</p> - From English wiki to translated PDF and epub via Docbook - http://people.skolelinux.org/pere/blog/From_English_wiki_to_translated_PDF_and_epub_via_Docbook.html - http://people.skolelinux.org/pere/blog/From_English_wiki_to_translated_PDF_and_epub_via_Docbook.html - Tue, 17 Jun 2014 11:30:00 +0200 - <p>The <a href="http://www.skolelinux.org/">Debian Edu / Skolelinux -project</a> provide an instruction manual for teachers, system -administrators and other users that contain useful tips for setting up -and maintaining a Debian Edu installation. This text is about how the -text processing of this manual is handled in the project.</p> - -<p>One goal of the project is to provide information in the native -language of its users, and for this we need to handle translations. -But we also want to make sure each language contain the same -information, so for this we need a good way to keep the translations -in sync. And we want it to be easy for our users to improve the -documentation, avoiding the need to learn special formats or tools to -contribute, and the obvious way to do this is to make it possible to -edit the documentation using a web browser. We also want it to be -easy for translators to keep the translation up to date, and give them -help in figuring out what need to be translated. Here is the list of -tools and the process we have found trying to reach all these -goals.</p> - -<p>We maintain the authoritative source of our manual in the -<a href="https://wiki.debian.org/DebianEdu/Documentation/Wheezy/">Debian -wiki</a>, as several wiki pages written in English. It consist of one -front page with references to the different chapters, several pages -for each chapter, and finally one "collection page" gluing all the -chapters together into one large web page (aka -<a href="https://wiki.debian.org/DebianEdu/Documentation/Wheezy/AllInOne">the -AllInOne page</a>). The AllInOne page is the one used for further -processing and translations. Thanks to the fact that the -<a href="http://moinmo.in/">MoinMoin</a> installation on -wiki.debian.org support exporting pages in -<a href="http://www.docbook.org/">the Docbook format</a>, we can fetch -the list of pages to export using the raw version of the AllInOne -page, loop over each of them to generate a Docbook XML version of the -manual. This process also download images and transform image -references to use the locally downloaded images. The generated -Docbook XML files are slightly broken, so some post-processing is done -using the <tt>documentation/scripts/get_manual</tt> program, and the -result is a nice Docbook XML file (debian-edu-wheezy-manual.xml) and -a handfull of images. The XML file can now be used to generate PDF, HTML -and epub versions of the English manual. This is the basic step of -our process, making PDF (using dblatex), HTML (using xsltproc) and -epub (using dbtoepub) version from Docbook XML, and the resulting files -are placed in the debian-edu-doc-en binary package.</p> - -<p>But English documentation is not enough for us. We want translated -documentation too, and we want to make it easy for translators to -track the English original. For this we use the -<a href="http://packages.qa.debian.org/p/poxml.html">poxml</a> package, -which allow us to transform the English Docbook XML file into a -translation file (a .pot file), usable with the normal gettext based -translation tools used by those translating free software. The pot -file is used to create and maintain translation files (several .po -files), which the translations update with the native language -translations of all titles, paragraphs and blocks of text in the -original. The next step is combining the original English Docbook XML -and the translation file (say debian-edu-wheezy-manual.nb.po), to -create a translated Docbook XML file (in this case -debian-edu-wheezy-manual.nb.xml). This translated (or partly -translated, if the translation is not complete) Docbook XML file can -then be used like the original to create a PDF, HTML and epub version -of the documentation.</p> - -<p>The translators use different tools to edit the .po files. We -recommend using -<a href="http://www.kde.org/applications/development/lokalize/">lokalize</a>, -while some use emacs and vi, others can use web based editors like -<a href="http://pootle.translatehouse.org/">Poodle</a> or -<a href="https://www.transifex.com/">Transifex</a>. All we care about -is where the .po file end up, in our git repository. Updated -translations can either be committed directly to git, or submitted as -<a href="https://bugs.debian.org/src:debian-edu-doc">bug reports -against the debian-edu-doc package</a>.</p> - -<p>One challenge is images, which both might need to be translated (if -they show translated user applications), and are needed in different -formats when creating PDF and HTML versions (epub is a HTML version in -this regard). For this we transform the original PNG images to the -needed density and format during build, and have a way to provide -translated images by storing translated versions in -images/$LANGUAGECODE/. I am a bit unsure about the details here. The -package maintainers know more.</p> - -<p>If you wonder what the result look like, we provide -<a href="http://maintainer.skolelinux.org/debian-edu-doc/">the content -of the documentation packages on the web</a>. See for example the -<a href="http://maintainer.skolelinux.org/debian-edu-doc/it/debian-edu-wheezy-manual.pdf">Italian -PDF version</a> or the -<a href="http://maintainer.skolelinux.org/debian-edu-doc/de/debian-edu-wheezy-manual.html">German -HTML version</a>. We do not yet build the epub version by default, -but perhaps it will be done in the future.</p> - -<p>To learn more, check out -<a href="http://packages.qa.debian.org/d/debian-edu-doc.html">the -debian-edu-doc package</a>, -<a href="https://wiki.debian.org/DebianEdu/Documentation/Wheezy/">the -manual on the wiki</a> and -<a href="https://wiki.debian.org/DebianEdu/Documentation/Wheezy/Translations">the -translation instructions</a> in the manual.</p> + Free software archive system Nikita now able to store documents + http://people.skolelinux.org/pere/blog/Free_software_archive_system_Nikita_now_able_to_store_documents.html + http://people.skolelinux.org/pere/blog/Free_software_archive_system_Nikita_now_able_to_store_documents.html + Sun, 19 Mar 2017 08:00:00 +0100 + <p>The <a href="https://github.com/hiOA-ABI/nikita-noark5-core">Nikita +Noark 5 core project</a> is implementing the Norwegian standard for +keeping an electronic archive of government documents. +<a href="http://www.arkivverket.no/arkivverket/Offentlig-forvaltning/Noark/Noark-5/English-version">The +Noark 5 standard</a> document the requirement for data systems used by +the archives in the Norwegian government, and the Noark 5 web interface +specification document a REST web service for storing, searching and +retrieving documents and metadata in such archive. I've been involved +in the project since a few weeks before Christmas, when the Norwegian +Unix User Group +<a href="https://www.nuug.no/news/NOARK5_kjerne_som_fri_programvare_f_r_epostliste_hos_NUUG.shtml">announced +it supported the project</a>. I believe this is an important project, +and hope it can make it possible for the government archives in the +future to use free software to keep the archives we citizens depend +on. But as I do not hold such archive myself, personally my first use +case is to store and analyse public mail journal metadata published +from the government. I find it useful to have a clear use case in +mind when developing, to make sure the system scratches one of my +itches.</p> + +<p>If you would like to help make sure there is a free software +alternatives for the archives, please join our IRC channel +(<a href="irc://irc.freenode.net/%23nikita"">#nikita on +irc.freenode.net</a>) and +<a href="https://lists.nuug.no/mailman/listinfo/nikita-noark">the +project mailing list</a>.</p> + +<p>When I got involved, the web service could store metadata about +documents. But a few weeks ago, a new milestone was reached when it +became possible to store full text documents too. Yesterday, I +completed an implementation of a command line tool +<tt>archive-pdf</tt> to upload a PDF file to the archive using this +API. The tool is very simple at the moment, and find existing +<a href="https://en.wikipedia.org/wiki/Fonds">fonds</a>, series and +files while asking the user to select which one to use if more than +one exist. Once a file is identified, the PDF is associated with the +file and uploaded, using the title extracted from the PDF itself. The +process is fairly similar to visiting the archive, opening a cabinet, +locating a file and storing a piece of paper in the archive. Here is +a test run directly after populating the database with test data using +our API tester:</p> + +<p><blockquote><pre> +~/src//noark5-tester$ ./archive-pdf mangelmelding/mangler.pdf +using arkiv: Title of the test fonds created 2017-03-18T23:49:32.103446 +using arkivdel: Title of the test series created 2017-03-18T23:49:32.103446 + + 0 - Title of the test case file created 2017-03-18T23:49:32.103446 + 1 - Title of the test file created 2017-03-18T23:49:32.103446 +Select which mappe you want (or search term): 0 +Uploading mangelmelding/mangler.pdf + PDF title: Mangler i spesifikasjonsdokumentet for NOARK 5 Tjenestegrensesnitt + File 2017/1: Title of the test case file created 2017-03-18T23:49:32.103446 +~/src//noark5-tester$ +</pre></blockquote></p> + +<p>You can see here how the fonds (arkiv) and serie (arkivdel) only had +one option, while the user need to choose which file (mappe) to use +among the two created by the API tester. The <tt>archive-pdf</tt> +tool can be found in the git repository for the API tester.</p> + +<p>In the project, I have been mostly working on +<a href="https://github.com/petterreinholdtsen/noark5-tester">the API +tester</a> so far, while getting to know the code base. The API +tester currently use +<a href="https://en.wikipedia.org/wiki/HATEOAS">the HATEOAS links</a> +to traverse the entire exposed service API and verify that the exposed +operations and objects match the specification, as well as trying to +create objects holding metadata and uploading a simple XML file to +store. The tester has proved very useful for finding flaws in our +implementation, as well as flaws in the reference site and the +specification.</p> + +<p>The test document I uploaded is a summary of all the specification +defects we have collected so far while implementing the web service. +There are several unclear and conflicting parts of the specification, +and we have +<a href="https://github.com/petterreinholdtsen/noark5-tester/tree/master/mangelmelding">started +writing down</a> the questions we get from implementing it. We use a +format inspired by how <a href="http://www.opengroup.org/austin/">The +Austin Group</a> collect defect reports for the POSIX standard with +<a href="http://www.opengroup.org/austin/mantis.html">their +instructions for the MANTIS defect tracker system</a>, in lack of an official way to structure defect reports for Noark 5 (our first submitted defect report was a <a href="https://github.com/petterreinholdtsen/noark5-tester/blob/master/mangelmelding/sendt/2017-03-15-mangel-prosess.md">request for a procedure for submitting defect reports</a> :). + +<p>The Nikita project is implemented using Java and Spring, and is +fairly easy to get up and running using Docker containers for those +that want to test the current code base. The API tester is +implemented in Python.</p> - Hvordan enkelt laste ned filmer fra NRK med den "nye" løsningen - http://people.skolelinux.org/pere/blog/Hvordan_enkelt_laste_ned_filmer_fra_NRK_med_den__nye__l_sningen.html - http://people.skolelinux.org/pere/blog/Hvordan_enkelt_laste_ned_filmer_fra_NRK_med_den__nye__l_sningen.html - Mon, 16 Jun 2014 19:20:00 +0200 - <p>Jeg har fortsatt behov for å kunne laste ned innslag fra NRKs -nettsted av og til for å se senere når jeg ikke er på nett, men -<a href="http://people.skolelinux.org/pere/blog/Hvordan_enkelt_laste_ned_filmer_fra_NRK.html">min -oppskrift fra 2011</a> sluttet å fungere da NRK byttet -avspillermetode. I dag fikk jeg endelig lett etter oppdatert løsning, -og jeg er veldig glad for å fortelle at den enkleste måten å laste ned -innslag er å bruke siste versjon 2014.06.07 av -<a href="http://rg3.github.io/youtube-dl/">youtube-dl</a>. Støtten i -youtube-dl <a href="https://github.com/rg3/youtube-dl/issues/2980">kom -inn for 23 dager siden</a> og -<a href="http://packages.qa.debian.org/y/youtube-dl.html">versjonen i -Debian</a> fungerer fint også som backport til Debian Wheezy. Det er -et lite problem, det håndterer kun URLer med små bokstaver, men hvis -en har en URL med store bokstaver kan en bare gjøre alle store om til -små bokstaver for å få youtube-dl til å laste ned. Rapporterte -nettopp -<a href="https://github.com/rg3/youtube-dl/issues/2980">problemet til -utviklerne</a>, og antar de får fikset det snart.</p> - -<p>Dermed er alt klart til å laste ned dokumentarene om -<a href="http://tv.nrk.no/program/KOID23005014/usas-hemmelige-avlytting">USAs -hemmelige avlytting</a> og -<a href="http://tv.nrk.no/program/KOID23005114/selskapene-bak-usas-avlytting">Selskapene -bak USAs avlytting</a>, i tillegg til -<a href="http://tv.nrk.no/program/KOID20005814/et-moete-med-edward-snowden">intervjuet -med Edward Snowden gjort av den tyske tv-kanalen ARD</a>. Anbefaler -alle å se disse, sammen med -<a href="http://media.ccc.de/browse/congress/2013/30C3_-_5713_-_en_-_saal_2_-_201312301130_-_to_protect_and_infect_part_2_-_jacob.html">foredraget -til Jacob Appelbaum på siste CCC-konferanse</a>, for å forstå mer om -hvordan overvåkningen av borgerne brer om seg.</p> - -<p>Takk til gode venner på foreningen NUUGs IRC-kanal -<a href="irc://irc.freenode.net/%23nuug">#nuug på irc.freenode.net</a> -for tipsene som fikk meg i mål</a>.</p> - -<p><strong>Oppdatering 2014-06-17</strong>: Etter at jeg publiserte -denne, ble jeg tipset om bloggposten -"<a href="http://ingvar.blog.redpill-linpro.com/2012/05/31/downloading-hd-content-from-tv-nrk-no/">Downloading -HD content from tv.nrk.no</a>" av Ingvar Hagelund, som har alternativ -implementasjon og tips for å lage mkv-fil med undertekstene inkludert. -Kanskje den passer bedre for deg? I tillegg ble feilen i youtube-dl -ble fikset litt senere ut på dagen i går, samt at youtube-dl fikk -støtte for å laste ned undertitler. Takk til Anders Einar Hilden for -god innsats og youtube-dl-utviklerne for rask respons.</p> + Detecting NFS hangs on Linux without hanging yourself... + http://people.skolelinux.org/pere/blog/Detecting_NFS_hangs_on_Linux_without_hanging_yourself___.html + http://people.skolelinux.org/pere/blog/Detecting_NFS_hangs_on_Linux_without_hanging_yourself___.html + Thu, 9 Mar 2017 15:20:00 +0100 + <p>Over the years, administrating thousand of NFS mounting linux +computers at the time, I often needed a way to detect if the machine +was experiencing NFS hang. If you try to use <tt>df</tt> or look at a +file or directory affected by the hang, the process (and possibly the +shell) will hang too. So you want to be able to detect this without +risking the detection process getting stuck too. It has not been +obvious how to do this. When the hang has lasted a while, it is +possible to find messages like these in dmesg:</p> + +<p><blockquote> +nfs: server nfsserver not responding, still trying +<br>nfs: server nfsserver OK +</blockquote></p> + +<p>It is hard to know if the hang is still going on, and it is hard to +be sure looking in dmesg is going to work. If there are lots of other +messages in dmesg the lines might have rotated out of site before they +are noticed.</p> + +<p>While reading through the nfs client implementation in linux kernel +code, I came across some statistics that seem to give a way to detect +it. The om_timeouts sunrpc value in the kernel will increase every +time the above log entry is inserted into dmesg. And after digging a +bit further, I discovered that this value show up in +/proc/self/mountstats on Linux.</p> + +<p>The mountstats content seem to be shared between files using the +same file system context, so it is enough to check one of the +mountstats files to get the state of the mount point for the machine. +I assume this will not show lazy umounted NFS points, nor NFS mount +points in a different process context (ie with a different filesystem +view), but that does not worry me.</p> + +<p>The content for a NFS mount point look similar to this:</p> + +<p><blockquote><pre> +[...] +device /dev/mapper/Debian-var mounted on /var with fstype ext3 +device nfsserver:/mnt/nfsserver/home0 mounted on /mnt/nfsserver/home0 with fstype nfs statvers=1.1 + opts: rw,vers=3,rsize=65536,wsize=65536,namlen=255,acregmin=3,acregmax=60,acdirmin=30,acdirmax=60,soft,nolock,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=129.240.3.145,mountvers=3,mountport=4048,mountproto=udp,local_lock=all + age: 7863311 + caps: caps=0x3fe7,wtmult=4096,dtsize=8192,bsize=0,namlen=255 + sec: flavor=1,pseudoflavor=1 + events: 61063112 732346265 1028140 35486205 16220064 8162542 761447191 71714012 37189 3891185 45561809 110486139 4850138 420353 15449177 296502 52736725 13523379 0 52182 9016896 1231 0 0 0 0 0 + bytes: 166253035039 219519120027 0 0 40783504807 185466229638 11677877 45561809 + RPC iostats version: 1.0 p/v: 100003/3 (nfs) + xprt: tcp 925 1 6810 0 0 111505412 111480497 109 2672418560317 0 248 53869103 22481820 + per-op statistics + NULL: 0 0 0 0 0 0 0 0 + GETATTR: 61063106 61063108 0 9621383060 6839064400 453650 77291321 78926132 + SETATTR: 463469 463470 0 92005440 66739536 63787 603235 687943 + LOOKUP: 17021657 17021657 0 3354097764 4013442928 57216 35125459 35566511 + ACCESS: 14281703 14290009 5 2318400592 1713803640 1709282 4865144 7130140 + READLINK: 125 125 0 20472 18620 0 1112 1118 + READ: 4214236 4214237 0 715608524 41328653212 89884 22622768 22806693 + WRITE: 8479010 8494376 22 187695798568 1356087148 178264904 51506907 231671771 + CREATE: 171708 171708 0 38084748 46702272 873 1041833 1050398 + MKDIR: 3680 3680 0 773980 993920 26 23990 24245 + SYMLINK: 903 903 0 233428 245488 6 5865 5917 + MKNOD: 80 80 0 20148 21760 0 299 304 + REMOVE: 429921 429921 0 79796004 61908192 3313 2710416 2741636 + RMDIR: 3367 3367 0 645112 484848 22 5782 6002 + RENAME: 466201 466201 0 130026184 121212260 7075 5935207 5961288 + LINK: 289155 289155 0 72775556 67083960 2199 2565060 2585579 + READDIR: 2933237 2933237 0 516506204 13973833412 10385 3190199 3297917 + READDIRPLUS: 1652839 1652839 0 298640972 6895997744 84735 14307895 14448937 + FSSTAT: 6144 6144 0 1010516 1032192 51 9654 10022 + FSINFO: 2 2 0 232 328 0 1 1 + PATHCONF: 1 1 0 116 140 0 0 0 + COMMIT: 0 0 0 0 0 0 0 0 + +device binfmt_misc mounted on /proc/sys/fs/binfmt_misc with fstype binfmt_misc +[...] +</pre></blockquote></p> + +<p>The key number to look at is the third number in the per-op list. +It is the number of NFS timeouts experiences per file system +operation. Here 22 write timeouts and 5 access timeouts. If these +numbers are increasing, I believe the machine is experiencing NFS +hang. Unfortunately the timeout value do not start to increase right +away. The NFS operations need to time out first, and this can take a +while. The exact timeout value depend on the setup. For example the +defaults for TCP and UDP mount points are quite different, and the +timeout value is affected by the soft, hard, timeo and retrans NFS +mount options.</p> + +<p>The only way I have been able to get working on Debian and RedHat +Enterprise Linux for getting the timeout count is to peek in /proc/. +But according to +<ahref="http://docs.oracle.com/cd/E19253-01/816-4555/netmonitor-12/index.html">Solaris +10 System Administration Guide: Network Services</a>, the 'nfsstat -c' +command can be used to get these timeout values. But this do not work +on Linux, as far as I can tell. I +<ahref="http://bugs.debian.org/857043">asked Debian about this</a>, +but have not seen any replies yet.</p> + +<p>Is there a better way to figure out if a Linux NFS client is +experiencing NFS hangs? Is there a way to detect which processes are +affected? Is there a way to get the NFS mount going quickly once the +network problem causing the NFS hang has been cleared? I would very +much welcome some clues, as we regularly run into NFS hangs.</p> - Free software car computer solution? - http://people.skolelinux.org/pere/blog/Free_software_car_computer_solution_.html - http://people.skolelinux.org/pere/blog/Free_software_car_computer_solution_.html - Thu, 29 May 2014 18:45:00 +0200 - <p>Dear lazyweb. I'm planning to set up a small Raspberry Pi computer -in my car, connected to -<a href="http://www.dx.com/p/400a-4-0-tft-lcd-digital-monitor-for-vehicle-parking-reverse-camera-1440x272-12v-dc-57776">a -small screen</a> next to the rear mirror. I plan to hook it up with a -GPS and a USB wifi card too. The idea is to get my own -"<a href="http://en.wikipedia.org/wiki/Carputer">Carputer</a>". But I -wonder if someone already created a good free software solution for -such car computer.</p> - -<p>This is my current wish list for such system:</p> - -<ul> - - <li>Work on Raspberry Pi.</li> - - <li>Show current speed limit based on location, and warn if going too - fast (for example using color codes yellow and red on the screen, - or make a sound). This could be done either using either data from - <a href="http://www.openstreetmap.org/">Openstreetmap</a> or OCR - info gathered from a dashboard camera.</li> - - <li>Track automatic toll road passes and their cost, show total spent - and make it possible to calculate toll costs for planned - route.</li> - - <li>Collect GPX tracks for use with OpenStreetMap.</li> - - <li>Automatically detect and use any wireless connection to connect - to home server. Try IP over DNS - (<a href="http://dev.kryo.se/iodine/">iodine</a>) or ICMP - (<a href="http://code.gerade.org/hans/">Hans</a>) if direct - connection do not work.</li> - - <li>Set up mesh network to talk to other cars with the same system, - or some standard car mesh protocol.</li> - - <li>Warn when approaching speed cameras and speed camera ranges - (speed calculated between two cameras).</li> - - <li>Suport dashboard/front facing camera to discover speed limits and - run OCR to track registration number of passing cars.</li> - -</ul> - -<p>If you know of any free software car computer system supporting -some or all of these features, please let me know.</p> + How does it feel to be wiretapped, when you should be doing the wiretapping... + http://people.skolelinux.org/pere/blog/How_does_it_feel_to_be_wiretapped__when_you_should_be_doing_the_wiretapping___.html + http://people.skolelinux.org/pere/blog/How_does_it_feel_to_be_wiretapped__when_you_should_be_doing_the_wiretapping___.html + Wed, 8 Mar 2017 11:50:00 +0100 + <p>So the new president in the United States of America claim to be +surprised to discover that he was wiretapped during the election +before he was elected president. He even claim this must be illegal. +Well, doh, if it is one thing the confirmations from Snowden +documented, it is that the entire population in USA is wiretapped, one +way or another. Of course the president candidates were wiretapped, +alongside the senators, judges and the rest of the people in USA.</p> + +<p>Next, the Federal Bureau of Investigation ask the Department of +Justice to go public rejecting the claims that Donald Trump was +wiretapped illegally. I fail to see the relevance, given that I am +sure the surveillance industry in USA believe they have all the legal +backing they need to conduct mass surveillance on the entire +world.</p> + +<p>There is even the director of the FBI stating that he never saw an +order requesting wiretapping of Donald Trump. That is not very +surprising, given how the FISA court work, with all its activity being +secret. Perhaps he only heard about it?</p> + +<p>What I find most sad in this story is how Norwegian journalists +present it. In a news reports the other day in the radio from the +Norwegian National broadcasting Company (NRK), I heard the journalist +claim that 'the FBI denies any wiretapping', while the reality is that +'the FBI denies any illegal wiretapping'. There is a fundamental and +important difference, and it make me sad that the journalists are +unable to grasp it.</p> + +<p><strong>Update 2017-03-13:</strong> Look like +<a href="https://theintercept.com/2017/03/13/rand-paul-is-right-nsa-routinely-monitors-americans-communications-without-warrants/">The +Intercept report that US Senator Rand Paul confirm what I state above</a>.</p> - Half the Coverity issues in Gnash fixed in the next release - http://people.skolelinux.org/pere/blog/Half_the_Coverity_issues_in_Gnash_fixed_in_the_next_release.html - http://people.skolelinux.org/pere/blog/Half_the_Coverity_issues_in_Gnash_fixed_in_the_next_release.html - Tue, 29 Apr 2014 14:20:00 +0200 - <p>I've been following <a href="http://www.getgnash.org/">the Gnash -project</a> for quite a while now. It is a free software -implementation of Adobe Flash, both a standalone player and a browser -plugin. Gnash implement support for the AVM1 format (and not the -newer AVM2 format - see -<a href="http://lightspark.github.io/">Lightspark</a> for that one), -allowing several flash based sites to work. Thanks to the friendly -developers at Youtube, it also work with Youtube videos, because the -Javascript code at Youtube detect Gnash and serve a AVM1 player to -those users. :) Would be great if someone found time to implement AVM2 -support, but it has not happened yet. If you install both Lightspark -and Gnash, Lightspark will invoke Gnash if it find a AVM1 flash file, -so you can get both handled as free software. Unfortunately, -Lightspark so far only implement a small subset of AVM2, and many -sites do not work yet.</p> - -<p>A few months ago, I started looking at -<a href="http://scan.coverity.com/">Coverity</a>, the static source -checker used to find heaps and heaps of bugs in free software (thanks -to the donation of a scanning service to free software projects by the -company developing this non-free code checker), and Gnash was one of -the projects I decided to check out. Coverity is able to find lock -errors, memory errors, dead code and more. A few days ago they even -extended it to also be able to find the heartbleed bug in OpenSSL. -There are heaps of checks being done on the instrumented code, and the -amount of bogus warnings is quite low compared to the other static -code checkers I have tested over the years.</p> - -<p>Since a few weeks ago, I've been working with the other Gnash -developers squashing bugs discovered by Coverity. I was quite happy -today when I checked the current status and saw that of the 777 issues -detected so far, 374 are marked as fixed. This make me confident that -the next Gnash release will be more stable and more dependable than -the previous one. Most of the reported issues were and are in the -test suite, but it also found a few in the rest of the code.</p> - -<p>If you want to help out, you find us on -<a href="https://lists.gnu.org/mailman/listinfo/gnash-dev">the -gnash-dev mailing list</a> and on -<a href="irc://irc.freenode.net/#gnash">the #gnash channel on -irc.freenode.net IRC server</a>.</p> + Norwegian Bokmål translation of The Debian Administrator's Handbook complete, proofreading in progress + http://people.skolelinux.org/pere/blog/Norwegian_Bokm_l_translation_of_The_Debian_Administrator_s_Handbook_complete__proofreading_in_progress.html + http://people.skolelinux.org/pere/blog/Norwegian_Bokm_l_translation_of_The_Debian_Administrator_s_Handbook_complete__proofreading_in_progress.html + Fri, 3 Mar 2017 14:50:00 +0100 + <p>For almost a year now, we have been working on making a Norwegian +Bokmål edition of <a href="https://debian-handbook.info/">The Debian +Administrator's Handbook</a>. Now, thanks to the tireless effort of +Ole-Erik, Ingrid and Andreas, the initial translation is complete, and +we are working on the proof reading to ensure consistent language and +use of correct computer science terms. The plan is to make the book +available on paper, as well as in electronic form. For that to +happen, the proof reading must be completed and all the figures need +to be translated. If you want to help out, get in touch.</p> + +<p><a href="http://people.skolelinux.org/pere/debian-handbook/debian-handbook-nb-NO.pdf">A + +fresh PDF edition</a> in A4 format (the final book will have smaller +pages) of the book created every morning is available for +proofreading. If you find any errors, please +<a href="https://hosted.weblate.org/projects/debian-handbook/">visit +Weblate and correct the error</a>. The +<a href="http://l.github.io/debian-handbook/stat/nb-NO/index.html">state +of the translation including figures</a> is a useful source for those +provide Norwegian bokmål screen shots and figures.</p> - Install hardware dependent packages using tasksel (Isenkram 0.7) - http://people.skolelinux.org/pere/blog/Install_hardware_dependent_packages_using_tasksel__Isenkram_0_7_.html - http://people.skolelinux.org/pere/blog/Install_hardware_dependent_packages_using_tasksel__Isenkram_0_7_.html - Wed, 23 Apr 2014 14:50:00 +0200 - <p>It would be nice if it was easier in Debian to get all the hardware -related packages relevant for the computer installed automatically. -So I implemented one, using -<a href="http://packages.qa.debian.org/isenkram">my Isenkram -package</a>. To use it, install the tasksel and isenkram packages and -run tasksel as user root. You should be presented with a new option, -"Hardware specific packages (autodetected by isenkram)". When you -select it, tasksel will install the packages isenkram claim is fit for -the current hardware, hot pluggable or not.<p> - -<p>The implementation is in two files, one is the tasksel menu entry -description, and the other is the script used to extract the list of -packages to install. The first part is in -<tt>/usr/share/tasksel/descs/isenkram.desc</tt> and look like -this:</p> - -<p><blockquote><pre> -Task: isenkram -Section: hardware -Description: Hardware specific packages (autodetected by isenkram) - Based on the detected hardware various hardware specific packages are - proposed. -Test-new-install: mark show -Relevance: 8 -Packages: for-current-hardware -</pre></blockquote></p> - -<p>The second part is in -<tt>/usr/lib/tasksel/packages/for-current-hardware</tt> and look like -this:</p> - -<p><blockquote><pre> -#!/bin/sh -# -( - isenkram-lookup - isenkram-autoinstall-firmware -l -) | sort -u -</pre></blockquote></p> - -<p>All in all, a very short and simple implementation making it -trivial to install the hardware dependent package we all may want to -have installed on our machines. I've not been able to find a way to -get tasksel to tell you exactly which packages it plan to install -before doing the installation. So if you are curious or careful, -check the output from the isenkram-* command line tools first.</p> - -<p>The information about which packages are handling which hardware is -fetched either from the isenkram package itself in -/usr/share/isenkram/, from git.debian.org or from the APT package -database (using the Modaliases header). The APT package database -parsing have caused a nasty resource leak in the isenkram daemon (bugs -<a href="http://bugs.debian.org/719837">#719837</a> and -<a href="http://bugs.debian.org/730704">#730704</a>). The cause is in -the python-apt code (bug -<a href="http://bugs.debian.org/745487">#745487</a>), but using a -workaround I was able to get rid of the file descriptor leak and -reduce the memory leak from ~30 MiB per hardware detection down to -around 2 MiB per hardware detection. It should make the desktop -daemon a lot more useful. The fix is in version 0.7 uploaded to -unstable today.</p> - -<p>I believe the current way of mapping hardware to packages in -Isenkram is is a good draft, but in the future I expect isenkram to -use the AppStream data source for this. A proposal for getting proper -AppStream support into Debian is floating around as -<a href="https://wiki.debian.org/DEP-11">DEP-11</a>, and -<a href="https://wiki.debian.org/SummerOfCode2014/Projects#SummerOfCode2014.2FProjects.2FAppStreamDEP11Implementation.AppStream.2FDEP-11_for_the_Debian_Archive">GSoC -project</a> will take place this summer to improve the situation. I -look forward to seeing the result, and welcome patches for isenkram to -start using the information when it is ready.</p> - -<p>If you want your package to map to some specific hardware, either -add a "Xb-Modaliases" header to your control file like I did in -<a href="http://packages.qa.debian.org/pymissile">the pymissile -package</a> or submit a bug report with the details to the isenkram -package. See also -<a href="http://people.skolelinux.org/pere/blog/tags/isenkram/">all my -blog posts tagged isenkram</a> for details on the notation. I expect -the information will be migrated to AppStream eventually, but for the -moment I got no better place to store it.</p> + Unlimited randomness with the ChaosKey? + http://people.skolelinux.org/pere/blog/Unlimited_randomness_with_the_ChaosKey_.html + http://people.skolelinux.org/pere/blog/Unlimited_randomness_with_the_ChaosKey_.html + Wed, 1 Mar 2017 20:50:00 +0100 + <p>A few days ago I ordered a small batch of +<a href="http://altusmetrum.org/ChaosKey/">the ChaosKey</a>, a small +USB dongle for generating entropy created by Bdale Garbee and Keith +Packard. Yesterday it arrived, and I am very happy to report that it +work great! According to its designers, to get it to work out of the +box, you need the Linux kernel version 4.1 or later. I tested on a +Debian Stretch machine (kernel version 4.9), and there it worked just +fine, increasing the available entropy very quickly. I wrote a small +test oneliner to test. It first print the current entropy level, +drain /dev/random, and then print the entropy level for five seconds. +Here is the situation without the ChaosKey inserted:</p> + +<blockquote><pre> +% cat /proc/sys/kernel/random/entropy_avail; \ + dd bs=1M if=/dev/random of=/dev/null count=1; \ + for n in $(seq 1 5); do \ + cat /proc/sys/kernel/random/entropy_avail; \ + sleep 1; \ + done +300 +0+1 oppføringer inn +0+1 oppføringer ut +28 byte kopiert, 0,000264565 s, 106 kB/s +4 +8 +12 +17 +21 +% +</pre></blockquote> + +<p>The entropy level increases by 3-4 every second. In such case any +application requiring random bits (like a HTTPS enabled web server) +will halt and wait for more entrpy. And here is the situation with +the ChaosKey inserted:</p> + +<blockquote><pre> +% cat /proc/sys/kernel/random/entropy_avail; \ + dd bs=1M if=/dev/random of=/dev/null count=1; \ + for n in $(seq 1 5); do \ + cat /proc/sys/kernel/random/entropy_avail; \ + sleep 1; \ + done +1079 +0+1 oppføringer inn +0+1 oppføringer ut +104 byte kopiert, 0,000487647 s, 213 kB/s +433 +1028 +1031 +1035 +1038 +% +</pre></blockquote> + +<p>Quite the difference. :) I bought a few more than I need, in case +someone want to buy one here in Norway. :)</p> + +<p>Update: The dongle was presented at Debconf last year. You might +find <a href="https://debconf16.debconf.org/talks/94/">the talk +recording illuminating</a>. It explains exactly what the source of +randomness is, if you are unable to spot it from the schema drawing +available from the ChaosKey web site linked at the start of this blog +post.</p> - FreedomBox milestone - all packages now in Debian Sid - http://people.skolelinux.org/pere/blog/FreedomBox_milestone___all_packages_now_in_Debian_Sid.html - http://people.skolelinux.org/pere/blog/FreedomBox_milestone___all_packages_now_in_Debian_Sid.html - Tue, 15 Apr 2014 22:10:00 +0200 - <p>The <a href="https://wiki.debian.org/FreedomBox">Freedombox -project</a> is working on providing the software and hardware to make -it easy for non-technical people to host their data and communication -at home, and being able to communicate with their friends and family -encrypted and away from prying eyes. It is still going strong, and -today a major mile stone was reached.</p> - -<p>Today, the last of the packages currently used by the project to -created the system images were accepted into Debian Unstable. It was -the freedombox-setup package, which is used to configure the images -during build and on the first boot. Now all one need to get going is -the build code from the freedom-maker git repository and packages from -Debian. And once the freedombox-setup package enter testing, we can -build everything directly from Debian. :)</p> - -<p>Some key packages used by Freedombox are -<a href="http://packages.qa.debian.org/freedombox-setup">freedombox-setup</a>, -<a href="http://packages.qa.debian.org/plinth">plinth</a>, -<a href="http://packages.qa.debian.org/pagekite">pagekite</a>, -<a href="http://packages.qa.debian.org/tor">tor</a>, -<a href="http://packages.qa.debian.org/privoxy">privoxy</a>, -<a href="http://packages.qa.debian.org/owncloud">owncloud</a> and -<a href="http://packages.qa.debian.org/dnsmasq">dnsmasq</a>. There -are plans to integrate more packages into the setup. User -documentation is maintained on the Debian wiki. Please -<a href="https://wiki.debian.org/FreedomBox/Manual/Jessie">check out -the manual</a> and help us improve it.</p> - -<p>To test for yourself and create boot images with the FreedomBox -setup, run this on a Debian machine using a user with sudo rights to -become root:</p> - -<p><pre> -sudo apt-get install git vmdebootstrap mercurial python-docutils \ - mktorrent extlinux virtualbox qemu-user-static binfmt-support \ - u-boot-tools -git clone http://anonscm.debian.org/git/freedombox/freedom-maker.git \ - freedom-maker -make -C freedom-maker dreamplug-image raspberry-image virtualbox-image -</pre></p> - -<p>Root access is needed to run debootstrap and mount loopback -devices. See the README in the freedom-maker git repo for more -details on the build. If you do not want all three images, trim the -make line. Note that the virtualbox-image target is not really -virtualbox specific. It create a x86 image usable in kvm, qemu, -vmware and any other x86 virtual machine environment. You might need -the version of vmdebootstrap in Jessie to get the build working, as it -include fixes for a race condition with kpartx.</p> - -<p>If you instead want to install using a Debian CD and the preseed -method, boot a Debian Wheezy ISO and use this boot argument to load -the preseed values:</p> - -<p><pre> -url=<a href="http://www.reinholdtsen.name/freedombox/preseed-jessie.dat">http://www.reinholdtsen.name/freedombox/preseed-jessie.dat</a> -</pre></p> - -<p>I have not tested it myself the last few weeks, so I do not know if -it still work.</p> - -<p>If you wonder how to help, one task you could look at is using -systemd as the boot system. It will become the default for Linux in -Jessie, so we need to make sure it is usable on the Freedombox. I did -a simple test a few weeks ago, and noticed dnsmasq failed to start -during boot when using systemd. I suspect there are other problems -too. :) To detect problems, there is a test suite included, which can -be run from the plinth web interface.</p> - -<p>Give it a go and let us know how it goes on the mailing list, and help -us get the new release published. :) Please join us on -<a href="irc://irc.debian.org:6667/%23freedombox">IRC (#freedombox on -irc.debian.org)</a> and -<a href="http://lists.alioth.debian.org/mailman/listinfo/freedombox-discuss">the -mailing list</a> if you want to help make this vision come true.</p> + Detect OOXML files with undefined behaviour? + http://people.skolelinux.org/pere/blog/Detect_OOXML_files_with_undefined_behaviour_.html + http://people.skolelinux.org/pere/blog/Detect_OOXML_files_with_undefined_behaviour_.html + Tue, 21 Feb 2017 00:20:00 +0100 + <p>I just noticed +<a href="http://www.arkivrad.no/aktuelt/riksarkivarens-forskrift-pa-horing">the +new Norwegian proposal for archiving rules in the goverment</a> list +<a href="http://www.ecma-international.org/publications/standards/Ecma-376.htm">ECMA-376</a> +/ ISO/IEC 29500 (aka OOXML) as valid formats to put in long term +storage. Luckily such files will only be accepted based on +pre-approval from the National Archive. Allowing OOXML files to be +used for long term storage might seem like a good idea as long as we +forget that there are plenty of ways for a "valid" OOXML document to +have content with no defined interpretation in the standard, which +lead to a question and an idea.</p> + +<p>Is there any tool to detect if a OOXML document depend on such +undefined behaviour? It would be useful for the National Archive (and +anyone else interested in verifying that a document is well defined) +to have such tool available when considering to approve the use of +OOXML. I'm aware of the +<a href="https://github.com/arlm/officeotron/">officeotron OOXML +validator</a>, but do not know how complete it is nor if it will +report use of undefined behaviour. Are there other similar tools +available? Please send me an email if you know of any such tool.</p>