X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/1d0cc4e6ce01da684d86f18b95b02050dc298807..cded90eceb255184a3506b35d622eea9760ea993:/blog/index.rss diff --git a/blog/index.rss b/blog/index.rss index fcdddec301..770eae38cb 100644 --- a/blog/index.rss +++ b/blog/index.rss @@ -7,207 +7,194 @@ - Measuring the speaker frequency response using the AUDMES free software GUI - nice free software - http://people.skolelinux.org/pere/blog/Measuring_the_speaker_frequency_response_using_the_AUDMES_free_software_GUI___nice_free_software.html - http://people.skolelinux.org/pere/blog/Measuring_the_speaker_frequency_response_using_the_AUDMES_free_software_GUI___nice_free_software.html - Mon, 22 Oct 2018 08:40:00 +0200 - <p><img src="http://people.skolelinux.org/pere/blog/images/2018-10-22-audmes-measure-speakers.png" align="right" width="40%"/></p> - -<p>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'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 -<a href="https://www.diyaudioandvideo.com/Tutorial/SpeakerResponseTesting/">Speaker -Testing and Analysis</a> describing how to test speakers, and it listing -several software options, among them -<a href="https://sourceforge.net/projects/audmes/">AUDio MEasurement -System (AUDMES)</a>. 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 -<a href="http://novo.press/understanding-speaker-specifications-and-frequency-response/">Understanding -Speaker Specifications and Frequency Response</a> and an article from -ecoustics on -<a href="https://www.ecoustics.com/articles/understanding-speaker-frequency-response/">Understanding -Speaker Frequency Response</a>, 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.</p> - -<p>The first hurdle was that AUDMES hadn'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.</p> - -<p>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 -<a href="http://freehearingtestsoftware.com">Free Hearing Test -Software</a>, 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.</p> - -<p>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 -<a href="https://bugs.debian.org/910876">include in Debian</a>? 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 -<a href="https://www.roomeqwizard.com/">REW</a>, but I want something -that can be developed also when the vendor looses interest.</p> + Nikita version 0.6 released - free software archive API server + http://people.skolelinux.org/pere/blog/Nikita_version_0_6_released___free_software_archive_API_server.html + http://people.skolelinux.org/pere/blog/Nikita_version_0_6_released___free_software_archive_API_server.html + Thu, 10 Jun 2021 17:10:00 +0200 + <p>I am very pleased to be able to share with you +<a href="https://lists.nuug.no/pipermail/nikita-noark/2021-June/000576.html">the +announcement of a new version of the archiving system Nikita</a> +published by its lead developer Thomas Sødring:</p> + +<p><blockquote> + +<p>It is with great pleasure that we can announce a new release of +nikita. Version 0.6 +(<a href="https://gitlab.com/OsloMet-ABI/nikita-noark5-core">https://gitlab.com/OsloMet-ABI/nikita-noark5-core</a>). This +release makes new record keeping functionality available. This really +is a maturity release. Both in terms of functionality but also code. +Considerable effort has gone into refactoring the codebase and +simplifying the code. Notable changes for this release include:</p> -<p>As usual, if you use Bitcoin and want to show your support of my -activities, please send Bitcoin donations to my address -<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p> - - - - - Web browser integration of VLC with Bittorrent support - http://people.skolelinux.org/pere/blog/Web_browser_integration_of_VLC_with_Bittorrent_support.html - http://people.skolelinux.org/pere/blog/Web_browser_integration_of_VLC_with_Bittorrent_support.html - Sun, 21 Oct 2018 09:50:00 +0200 - <p>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 -<a href="https://www.nrk.no/">NRK</a>, Linux distributors like -<a href="https://www.debian.org/">Debian</a> and -<a href="https://www.ubuntu.com/">Ubuntu</a>, and of course the -<a href="https://archive.org/">Internet archive</A>. - -<p>Almost a month ago -<a href="https://tracker.debian.org/pkg/vlc-plugin-bittorrent">a new -package adding Bittorrent support to VLC</a> became available in -Debian testing and unstable. To test it, simply install it like -this:</p> +<ul> -<p><pre> -apt install vlc-plugin-bittorrent -</pre></p> + <li>Significantly improved OData parsing</li> + <li>Support for business specific metadata and national identifiers</li> + <li>Continued implementation of domain model and endpoints</li> + <li>Improved testing</li> + <li>Ability to export and import from arkivstruktur.xml</li> -<p>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 -<a href="https://archive.org/details/CopyingIsNotTheft1080p">Internet -Archive page with movies</a> using a web browser and click on the -torrent link to start streaming the movie.</p> - -<p>Note, there is still some misfeatures in the plugin. One is the -fact that it will hang and -<a href="https://github.com/johang/vlc-bittorrent/issues/13">block VLC -from exiting until the torrent streaming starts</a>. Another is the -fact that it -<a href="https://github.com/johang/vlc-bittorrent/issues/9">will pick -and play a random file in a multi file torrent</a>. 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.</p> - -<p>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.</p> +</ul> -<p>As usual, if you use Bitcoin and want to show your support of my -activities, please send Bitcoin donations to my address -<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p> - - - - - Release 0.2 of free software archive system Nikita announced - http://people.skolelinux.org/pere/blog/Release_0_2_of_free_software_archive_system_Nikita_announced.html - http://people.skolelinux.org/pere/blog/Release_0_2_of_free_software_archive_system_Nikita_announced.html - Thu, 18 Oct 2018 14:40:00 +0200 - <p>This morning, the new release of the -<a href="https://gitlab.com/OsloMet-ABI/nikita-noark5-core/">Nikita -Noark 5 core project</a> was -<a href="https://lists.nuug.no/pipermail/nikita-noark/2018-October/000406.html">announced -on the project mailing list</a>. 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): +<p>We are currently in the process of reaching an agreement with an +archive institution to publish their picture archive using nikita with +business specific metadata and we hope that we can share this with you +soon. This is an interesting project as it allows the organisation to +bring an older picture archive back to life while using the original +metadata values stored as business specific metadata. Combined with +OData means the scope and use of the archive is significantly +increased and will showcase both the flexibility and power of +Noark.</p> + +<p>I really think we are approaching a version 1.0 of nikita, even +though there is still a lot of work to be done. The notable work at +the moment is to implement access-control and full text indexing of +documents.</p> + +<p>My sincere thanks to everyone who has contributed to this +release!</p> + +<p>- Thomas</p> + +<p><strong>Release 0.6 2021-06-10 (d1ba5fc7e8bad0cfdce45ac20354b19d10ebbc7b)</strong></p> <ul> - <li>Fix typos in REL names</li> - <li>Tidy up error message reporting</li> - <li>Fix issue where we used Integer.valueOf(), not Integer.getInteger()</li> - <li>Change some String handling to StringBuffer</li> - <li>Fix error reporting</li> - <li>Code tidy-up</li> - <li>Fix issue using static non-synchronized SimpleDateFormat to avoid - race conditions</li> - <li>Fix problem where deserialisers were treating integers as strings</li> - <li>Update methods to make them null-safe</li> - <li>Fix many issues reported by coverity</li> - <li>Improve equals(), compareTo() and hash() in domain model</li> - <li>Improvements to the domain model for metadata classes</li> - <li>Fix CORS issues when downloading document</li> - <li>Implementation of case-handling with registryEntry and document upload</li> - <li>Better support in Javascript for OPTIONS</li> - <li>Adding concept description of mail integration</li> - <li>Improve setting of default values for GET on ny-journalpost</li> - <li>Better handling of required values during deserialisation </li> - <li>Changed tilknyttetDato (M620) from date to dateTime</li> - <li>Corrected some opprettetDato (M600) (de)serialisation errors.</li> - <li>Improve parse error reporting.</li> - <li>Started on OData search and filtering.</li> - <li>Added Contributor Covenant Code of Conduct to project.</li> - <li>Moved repository and project from Github to Gitlab.</li> - <li>Restructured repository, moved code into src/ and web/.</li> - <li>Updated code to use Spring Boot version 2.</li> - <li>Added support for OAuth2 authentication.</li> - <li>Fixed several bugs discovered by Coverity.</li> - <li>Corrected handling of date/datetime fields.</li> - <li>Improved error reporting when rejecting during deserializatoin.</li> - <li>Adjusted default values provided for ny-arkivdel, ny-mappe, - ny-saksmappe, ny-journalpost and ny-dokumentbeskrivelse.</li> - <li>Several fixes for korrespondansepart*.</li> - <li>Updated web GUI: - <ul> - <li>Now handle both file upload and download.</li> - <li>Uses new OAuth2 authentication for login.</li> - <li>Forms now fetches default values from API using GET.</li> - <li>Added RFC 822 (email), TIFF and JPEG to list of possible file formats.</li> - </ul></li> + + <li>Refactor metadata entity search</li> + <li>Remove redundant security configuration</li> + <li>Make OpenAPI documentation work</li> + <li>Change database structure / inheritance model to a more sensible approach</li> + <li>Make it possible to move entities around the fonds structure</li> + <li>Implemented a number of missing endpoints</li> + <li>Make sure yml files are in sync</li> + <li>Implemented/finalised storing and use of + <ul> +     <li>Business Specific Metadata</li> +     <li>Norwegian National Identifiers</li> +     <li>Cross Reference</li> +     <li>Keyword</li> +     <li>StorageLocation</li> +     <li>Author</li> +     <li>Screening for relevant objects</li> +     <li>ChangeLog</li> +     <li>EventLog</li> + </ul></li> + <li>Make generation of updated docker image part of successful CI pipeline</li> + <li>Implement pagination for all list requests + <ul> +     <li>Refactor code to support lists</li> +     <li>Refactor code for readability</li> +     <li>Standardise the controller/service code</li> + </ul></li> + <li>Finalise File->CaseFile expansion and Record->registryEntry/recordNote +expansion</li> + <li>Improved Continuous Integration (CI) approach via gitlab</li> + <li>Changed conversion approach to generate tagged PDF documents</li> + <li>Updated dependencies + <ul> +     <li>For security reasons</li> +     <li>Brought codebase to spring-boot version 2.5.0</li> +     <li>Remove import of necessary dependencies</li> +     <li>Remove non-used metrics classes</li> + </ul></li> + <li>Added new analysis to CI including</li> + <li>Implemented storing of Keyword</li> + <li>Implemented storing of Screening and ScreeningMetadata</li> + <li>Improved OData support + <ul> +     <li>Better support for inheritance in queries where applicable</li> +     <li>Brought in more OData tests</li> +     <li>Improved OData/hibernate understanding of queries</li> +     <li>Implement $count, $orderby</li> +     <li>Finalise $top and $skip</li> +     <li>Make sure & is used between query parameters</li> + </ul></li> + <li>Improved Testing in codebase + <ul> +     <li>A new approach for integration tests to make test more readable</li> +     <li>Introduce tests in parallel with code development for TDD approach</li> +     <li>Remove test that required particular access to storage</li> + </ul></li> + <li>Implement case-handling process from received email to case-handler + <ul> +     <li>Develop required GUI elements (digital postroom from email)</li> +     <li>Introduced leader, quality control and postroom roles</li> + </ul></li> + <li>Make PUT requests return 200 OK not 201 CREATED</li> + <li>Make DELETE requests return 204 NO CONTENT not 200 OK</li> + <li>Replaced 'oppdatert*' with 'endret*' everywhere to match latest spec</li> + <li>Upgrade Gitlab CI to use python > 3 for CI scripts</li> + <li>Bug fixes + <ul> +     <li>Fix missing ALLOW</li> +     <li>Fix reading of objects from jar file during start-up</li> +     <li>Reduce the number of warnings in the codebase</li> +     <li>Fix delete problems</li> +     <li>Make better use of cascade for "leaf" objects</li> +     <li>Add missing annotations where relevant</li> +     <li>Remove the use of ETAG for delete</li> +     <li>Fix missing/wrong/broken rels discovered by runtest</li> +     <li>Drop unofficial convertFil (konverterFil) end point</li> +     <li>Fix regex problem for dateTime</li> +     <li>Fix multiple static analysis issues discovered by coverity</li> +     <li>Fix proxy problem when looking for object class names</li> +     <li>Add many missing translated Norwegian to English (internal) +attribute/entity names</li> +     <li>Change UUID generation approach to allow code also set a value</li> +     <li>Fix problem with Part/PartParson</li> +     <li>Fix problem with empty OData search results</li> +     <li>Fix metadata entity domain problem</li> + </ul></li> + <li>General Improvements + <ul> +     <li>Makes future refactoring easier as coupling is reduced</li> +     <li>Allow some constant variables to be set from property file</li> +     <li>Refactor code to make reflection work better across codebase</li> +     <li>Reduce the number of @Service layer classes used in @Controller +classes</li> +     <li>Be more consistent on naming of similar variable types</li> +     <li>Start printing rels/href if they are applicable</li> +     <li>Cleaner / standardised approach to deleting objects</li> +     <li>Avoid concatenation when using StringBuilder</li> +     <li>Consolidate code to avoid duplication</li> +     <li>Tidy formatting for a more consistent reading style across +similar class files</li> +     <li>Make throw a log.error message not an log.info message</li> +     <li>Make throw print the log value rather than printing in multiple +places</li> +     <li>Add some missing pronom codes</li> +     <li>Fix time formatting issue in Gitlab CI</li> +     <li>Remove stale / unused code</li> +     <li>Use only UUID datatype rather than combination String/UUID for systemID</li> +     <li>Mark variables final and @NotNull where relevant to indicate +intention</li> + </ul></li> + <li>Change Date values to DateTime to maintain compliance with Noark 5 +standard</li> + <li>Domain model improvements using Hypersistence Optimizer + <ul> +     <li>Move @Transactional from class to methods to avoid borrowing the JDBC Connection unnecessarily</li> +     <li>Fix OneToOne performance issues</li> +     <li>Fix ManyToMany performance issues</li> +     <li>Add missing bidirectional synchronization support</li> +     <li>Fix ManyToMany performance issue</li> + </ul></li> + <li>Make List<> and Set<> use final-keyword to avoid potential problems +during update operations</li> + <li>Changed internal URLs, replaced "hateoas-api" with "api".</li> + <li>Implemented storing of Precedence.</li> + <li>Corrected handling of screening.</li> + <li>Corrected _links collection returned for list of mixed entity types +to match the specific entity.</li> + <li>Improved several internal structures.</li> </ul> -<p>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(-).</p> +</blockquote></p> <p>If free and open standardized archiving API sound interesting to you, please contact us on IRC -(<a href="irc://irc.freenode.net/%23nikita">#nikita on -irc.freenode.net</a>) or email +(<a href="irc://irc.oftc.net/%23nikita">#nikita on +irc.oftc.net</a>) or email (<a href="https://lists.nuug.no/mailman/listinfo/nikita-noark">nikita-noark mailing list</a>).</p> @@ -218,105 +205,54 @@ activities, please send Bitcoin donations to my address - Fetching trusted timestamps using the rfc3161ng python module - http://people.skolelinux.org/pere/blog/Fetching_trusted_timestamps_using_the_rfc3161ng_python_module.html - http://people.skolelinux.org/pere/blog/Fetching_trusted_timestamps_using_the_rfc3161ng_python_module.html - Mon, 8 Oct 2018 12:30:00 +0200 - <p>I have earlier covered the basics of trusted timestamping using the -'openssl ts' client. See blog post for -<a href="http://people.skolelinux.org/pere/blog/Public_Trusted_Timestamping_services_for_everyone.html">2014</a>, -<a href="http://people.skolelinux.org/pere/blog/syslog_trusted_timestamp___chain_of_trusted_timestamps_for_your_syslog.html">2016</a> -and -<a href="http://people.skolelinux.org/pere/blog/Idea_for_storing_trusted_timestamps_in_a_Noark_5_archive.html">2017</a> -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 -<a href="https://dev.entrouvert.org/projects/python-rfc3161">the -rfc3161 library</a> 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 -<a href="https://github.com/trbs/rfc3161ng/">the rfc3161ng library</a>, -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 -<a href="https://tracker.debian.org/pkg/python-rfc3161ng">available in -Debian</a>, and a few days ago it entered Debian unstable and testing.</p> - -<p>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:</p> - -<pre> -#!/usr/bin/python3 - -""" - -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. - -""" - -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('https://freetsa.org/files/tsa.crt', cert_f) - ca_data_data = fetch('https://freetsa.org/files/cacert.pem', ca_f) - - # Then timestamp the message - timestamper = \ - rfc3161ng.RemoteTimestamper('http://freetsa.org/tsr', - certificate=certificate_data) - data = b"Python forever!\n" - tsr = timestamper(data=data, return_tsr=True) - - # Finally, convert message and response to something 'openssl ts' can verify - store(msg_f, data) - store(tsr_f, pyasn1.codec.der.encoder.encode(tsr)) - args = ["openssl", "ts", "-verify", - "-data", msg_f.name, - "-in", tsr_f.name, - "-CAfile", ca_f.name, - "-untrusted", cert_f.name] - subprocess.check_call(args) - -if '__main__' == __name__: - main() -</pre> - -<p>The code fetches the required certificates, store them as temporary -files, timestamp a simple message, store the message and timestamp to -disk and ask 'openssl ts' to verify the timestamp. A timestamp is -around 1.5 kiB in size, and should be fairly easy to store for future -use.</p> - + VLC bittorrent plugin in Bullseye, saved by the bell? + http://people.skolelinux.org/pere/blog/VLC_bittorrent_plugin_in_Bullseye__saved_by_the_bell_.html + http://people.skolelinux.org/pere/blog/VLC_bittorrent_plugin_in_Bullseye__saved_by_the_bell_.html + Sat, 1 May 2021 11:00:00 +0200 + <p>Yesterday morning I got a warning call from the Debian quality +control system that +<a href="https://tracker.debian.org/pkg/vlc-plugin-bittorrent">the VLC +bittorrent plugin</a> was due to be removed because of a release +critical bug in one of its dependencies. As you might remember, this +plugin make VLC able to stream videos directly from a bittorrent +source using both torrent files and magnet links, similar to using a +HTTP source. I believe such protocol support is a vital feature in +VLC, allowing efficient streaming from sources such at the almost 7 +million movies in <a href="https://archive.org/">the Internet +Archive</a>.</p> + +<p>The dependency was the unmaintained +<a href="https://tracker.debian.org/pkg/libtorrent-rasterbar">libtorrent-rasterbar</a> +package, and <a href="https://bugs.debian.org/987306">the bug in +question</a> blocked its python library from working properly. As I +did not want Bullseye to release without bittorrent support in VLC, I +set out to check out the status, and track down a fix for the problem. +Luckily the issue had already been identified and fixed upstream, +providing everything needed. All I needed to do was to fetch the +Debian git repository, extract and trim the patch from upstream and +apply it to the Debian package for upload.</p> + +<p>The fixed library was uploaded yesterday evening. But that is not +enough to get it into Bullseye, as Debian is currently in package +freeze to prepare for a new next stable release. Only non-critical +packages with +<a href="https://wiki.debian.org/ContinuousIntegration/autopkgtest">autopkgtest +setup</a> included, in other words able to validate automatically that +the package is working, are allowed to migrate automatically into the +next release at this stage. And the unmaintained libtorrent-rasterbar +lack such testing, and thus needed a manual override. I am happy to +report that such manual override was approved a few minutes ago, thus +increasing significantly the chance of VLC bittorrent streaming being +available out of the box also for Debian/Buster users. A bit too +close shave for my liking, as the Bullseye release is most likely just +a few days away, and this did feel like the package was saved by the +bell. I am so glad the warning email showed up in time for me to +handle the issue, and a big thanks go to the Debian Release team for +the quick feedback on +<a href="irc://irc.debian.org/%23debian-release">#debian-release</a> +and their <a href="https://bugs.debian.org/987865">swift +unblocking</a>.</p> + <p>As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p> @@ -324,61 +260,290 @@ activities, please send Bitcoin donations to my address - Automatic Google Drive sync using grive in Debian - http://people.skolelinux.org/pere/blog/Automatic_Google_Drive_sync_using_grive_in_Debian.html - http://people.skolelinux.org/pere/blog/Automatic_Google_Drive_sync_using_grive_in_Debian.html - Thu, 4 Oct 2018 15:20:00 +0200 - <p>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 -<a href="http://www.webupd8.org/">the Ubuntu UPD8 PPA</a> 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.</p> - -<p>I first created <tt>~/googledrive</tt>, entered the directory and -ran '<tt>grive -a</tt>' to authenticate the machine/user. Next, I -created a autostart hook in <tt>~/.config/autostart/grive.desktop</tt> -to start the sync when the user log in:</p> + Updated Valutakrambod, now also with information from NBX + http://people.skolelinux.org/pere/blog/Updated_Valutakrambod__now_also_with_information_from_NBX.html + http://people.skolelinux.org/pere/blog/Updated_Valutakrambod__now_also_with_information_from_NBX.html + Sat, 27 Feb 2021 13:30:00 +0100 + <p>I have neglected the Valutakrambod library for a while, but decided +this weekend to give it a face lift. I fixed a few minor glitches in +several of the service drivers, where the API had changed since I last +looked at the code. I also added support for fetching the order book +from the newcomer Norwegian Bitcoin Exchange.</p> + +<p>I also decided to migrate the project from github to gitlab in the +process. If you want a python library for talking to various currency +exchanges, check out +<a href="https://gitlab.com/petterreinholdtsen/valutakrambod">code for +valutakrambod</a>.</p> + +<p>This is what the output from '<tt>bin/btc-rates-curses -c</tt>' +looked like a few minutes ago:</p> <p><blockquote><pre> -[Desktop Entry] -Name=Google drive autosync -Type=Application -Exec=/home/user/bin/grive-sync + Name Pair Bid Ask Spread Ftcd Age Freq + Bitfinex BTCEUR 39229.0000 39246.0000 0.0% 44 44 nan + Bitmynt BTCEUR 39071.0000 41048.9000 4.8% 43 74 nan + Bitpay BTCEUR 39326.7000 nan nan% 39 nan nan + Bitstamp BTCEUR 39398.7900 39417.3200 0.0% 0 0 1 + Bl3p BTCEUR 39158.7800 39581.9000 1.1% 0 nan 3 + Coinbase BTCEUR 39197.3100 39621.9300 1.1% 38 nan nan + Kraken+BTCEUR 39432.9000 39433.0000 0.0% 0 0 0 + Paymium BTCEUR 39437.2100 39499.9300 0.2% 0 2264 nan + Bitmynt BTCNOK 409750.9600 420516.8500 2.6% 43 74 nan + Bitpay BTCNOK 410332.4000 nan nan% 39 nan nan + Coinbase BTCNOK 408675.7300 412813.7900 1.0% 38 nan nan + MiraiEx BTCNOK 412174.1800 418396.1500 1.5% 34 nan nan + NBX BTCNOK 405835.9000 408921.4300 0.8% 33 nan nan + Bitfinex BTCUSD 47341.0000 47355.0000 0.0% 44 53 nan + Bitpay BTCUSD 47388.5100 nan nan% 39 nan nan + Coinbase BTCUSD 47153.6500 47651.3700 1.0% 37 nan nan + Gemini BTCUSD 47416.0900 47439.0500 0.0% 36 336 nan + Hitbtc BTCUSD 47429.9900 47386.7400 -0.1% 0 0 0 + Kraken+BTCUSD 47401.7000 47401.8000 0.0% 0 0 0 + Exchangerates EURNOK 10.4012 10.4012 0.0% 38 76236 nan + Norgesbank EURNOK 10.4012 10.4012 0.0% 31 76236 nan + Bitstamp EURUSD 1.2030 1.2045 0.1% 2 2 1 + Exchangerates EURUSD 1.2121 1.2121 0.0% 38 76236 nan + Norgesbank USDNOK 8.5811 8.5811 0.0% 31 76236 nan </pre></blockquote></p> -<p>Finally, I wrote the <tt>~/bin/grive-sync</tt> script to sync -~/googledrive/ with the files in Google Drive.</p> +<p>Yes, I notice the negative spread on Hitbtc. Either I fail to +understand their Websocket API or they are sending bogus data. I've +seen the same with Kraken, and suspect there is something wrong with +the data they send.</p> -<p><blockquote><pre> +<p>As usual, if you use Bitcoin and want to show your support of my +activities, please send Bitcoin donations to my address +<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p> + + + + + Boken «Hvordan knuse overvåkningskapitalismen» lanseres på norsk + http://people.skolelinux.org/pere/blog/Boken__Hvordan_knuse_overv_kningskapitalismen__lanseres_p__norsk.html + http://people.skolelinux.org/pere/blog/Boken__Hvordan_knuse_overv_kningskapitalismen__lanseres_p__norsk.html + Tue, 26 Jan 2021 19:10:00 +0100 + <p>Etter intenst arbeid over mange måneder er endelig den norske +utgaven av «Hvordan knuse overvåkningskapitalismen» av Cory Doctorow +ferdig og klar til å glede millioner av lesere over hele verden. +Følgende pressemelding ble nettopp sendt ut til norske redaksjoner: + +<blockquote> + +<p><strong>Hva gjør stordata med oss, og hvordan gjør algoritmene +«fake news» til realiter?</strong></p> + +<p>Nå foreligger en viktig bok om temaet også på norsk. Boken klargjør +og foreslår hvordan vi selv som enkeltpersoner, men også nasjonalt og +internasjonalt kan bekjempe stordatakonsentrasjonene; +«overvåkingskapitalismen». Boken er «Hvordan knuse +overvåkingskapitalismen» av dr. Cory Doctorow. Den engelske +bokutgivelsen kom for noen dager siden og lanseres med et Webinar +torsdag 2021-01-28. Doctorow besøkte Norge og NUUG i desember med sin +presentasjon Monopoly, Not Mind Control: What's Really Happening With +"Surveillance Capitalism".</p> + +<p>I funn etter funn, eksempel etter eksempel, gjennomgår og +analyserer dr. Doctorow de utfordringer vi møter i større og større +omfang. Ikke bare i USA, men også her hjemme.</p> + +<p>Cory Doctorow er en britisk-kanadisk forfatter, journalist og +aktivist, kjent for sine science fiction-romaner, for arbeidet for +Creative Commons-bevegelsen, og for sine bidrag til reform av +opphavsretten. Han er både æresdoktor og gjesteforeleser i +datavitenskap ved Open University i UK, konsulent for Electronic +Frontier Foundation, og godt kjent for innsiktsfullt å kommentere og +skrive om digital utvikling.</p> + +<p>Boken lanseres nå på norsk, både som ebok og på papir, oversatt av +en dugnadsgjeng ledet av Petter Reinholdtsen.</p> + +<p>Boken reiser noen helt grunnleggende og samfunnskritiske spørsmål: +Hva fører det til når store deler av Internettet domineres av få store +aktører og deres styringsverktøy og algoritmer?</p> + +<p>Som individer bør vi være opptatt at grenser blir satt og håndhevet +- grenser for overvåkning av individet, for utøvelse av kommersiell +og politisk påvirkning, og for monopoldannelser i +dataverdenen. Slik grensesetting styrker personvernet.</p> + +<p>Konkurransetilsynet har ansvaret for at konkurranselovens § 11 skal +forby «et dominerende foretak for utilbørlig å utnytte og misbruke +sin dominerende stilling». Et tilsvarende forbud omfattes også av +EØS-avtalens artikkel 54. Boken går i detalj om serien av +innskrenkninger vi møter i valgfriheten, innskrenkninger som denne +lovgivningen nettopp skal forhindre. Håndhevelse av en slik lovgivning +er også til fordel for mindre næringsdrivende som uten dette får +begrenset sine faktiske eller potensielle muligheter for vekst og +etablering. «Slik atferd kan utgjøre et misbruk og kan ta ulike +former», skriver Konkurransetilsynet.</p> + +<p>Cory Doctorow går i sin bok lengre enn det med sine mange eksempler +på forhold det burde vært grepet inn mot.</p> + +<p>«Boken bør bidra til et sterkere engasjemen fra voktere av +Inter­nettet nasjonalt og internasjonalt - EU medregnet» sier +oversetter Ole-Erik Yrvin og fortsetter: «Vi har derfor +<a href="http://people.skolelinux.org/pere/blog/images/2021-01-26-knus-overvaakningskapitalismen-helleland.pdf">allerede +tatt opp bokens forslag</a> direkte med Distrikts- og +digitaliseringsminister Linda Hofstad Helleland (H) og +Konkurransetilsynet slik at de kan følges opp.»</p> + +<p>«Også Norge bør innta en pådriverrolle i denne utviklingen», sier +Petter Reinholdtsen. «Tiden er knapp, og tilsynsmyndighetene må få +de verktøy og de ressurser de trenger for at vi her hjemme skal oppnå +nødvendige resultater. Dette gjelder ikke bare vår egen generasjon; +det gjelder alle generasjoner fremover», avslutter Petter +Reinholdsen.</p> + +<p>Kontaktinformasjon:</p> + +<ul> + +<li>Ole-Erik Yrvin, oeyrvin (at) gmail.com, +47 46500450</li> + +<li>Petter Reinholdtsen, pere (at) hungry.com</li> + +</ul> + +<p>Relevante lenker:<p> + +<ul> + +<li>«Hvordan knuse overvåkingskapitalismen» kan bestilles på papir, +som ebok eller leses på nett via +<a href="http://www.hungry.com/~pere/publisher/">http://www.hungry.com/~pere/publisher/</a>.</li> + +<li>Opptak av NUUG-møtet Monopoly, Not Mind Control: What's Really +Happening With "Surveillance Capitalism" med Cory Doctorow, +<a href="https://www.nuug.no/aktiviteter/20201208-doctorow/">https://www.nuug.no/aktiviteter/20201208-doctorow/</a>.</li> + +<li>Påmelding til webinar som lanserer den engelske utgaven kan gjøres +via +<a href="https://craphound.com/category/destroy/">https://craphound.com/category/destroy/</a>.</li> + +<li>Cory Doctorows nettsted er +<a href="https://craphound.com/">https://craphound.com/</a>.</li> + +</ul> + +</blockquote> + +<p>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 +<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>. +Merk, betaling med bitcoin er ikke anonymt. :)</p> + + + + + Latest Jami back in Debian Testing, and scriptable using dbus + http://people.skolelinux.org/pere/blog/Latest_Jami_back_in_Debian_Testing__and_scriptable_using_dbus.html + http://people.skolelinux.org/pere/blog/Latest_Jami_back_in_Debian_Testing__and_scriptable_using_dbus.html + Tue, 12 Jan 2021 17:00:00 +0100 + <p>After a lot of hard work by its maintainer Alexandre Viau and +others, the decentralized communication platform +<a href="https://en.wikipedia.org/wiki/Jami_(software)">Jami</a> +(earlier known as Ring), managed to get +<a href="https://tracker.debian.org/pkg/ring">its latest version</a> +into Debian Testing. Several of its dependencies has caused build and +propagation problems, which all seem to be solved now.</p> + +<p>In addition to the fact that Jami is decentralized, similar to how +bittorrent is decentralized, I first of all like how it is not +connected to external IDs like phone numbers. This allow me to set up +computers to send me notifications using Jami without having to find +get a phone number for each computer. Automatic notification via Jami +is also made trivial thanks to the provided client side API (as a DBus +service). Here is my bourne shell script demonstrating how to let any +system send a message to any Jami address. It will create a new +identity before sending the message, if no Jami identity exist +already:</p> + +<p><pre> #!/bin/sh -set -e -cd ~/ -cleanup() { - if [ "$syncpid" ] ; then - kill $syncpid +# +# Usage: $0 <jami-address> <message> +# +# Send <message> to <jami-address>, create local jami account if +# missing. +# +# License: GPL v2 or later at your choice +# Author: Petter Reinholdtsen + + +if [ -z "$HOME" ] ; then + echo "error: missing \$HOME, required for dbus to work" + exit 1 +fi + +# First, get dbus running if not already running +DBUSLAUNCH=/usr/bin/dbus-launch +PIDFILE=/run/asterisk/dbus-session.pid +if [ -e $PIDFILE ] ; then + . $PIDFILE + if ! kill -0 $DBUS_SESSION_BUS_PID 2>/dev/null ; then + unset DBUS_SESSION_BUS_ADDRESS fi +fi +if [ -z "$DBUS_SESSION_BUS_ADDRESS" ] && [ -x "$DBUSLAUNCH" ]; then + DBUS_SESSION_BUS_ADDRESS="unix:path=$HOME/.dbus" + dbus-daemon --session --address="$DBUS_SESSION_BUS_ADDRESS" --nofork --nopidfile --syslog-only < /dev/null > /dev/null 2>&1 3>&1 & + DBUS_SESSION_BUS_PID=$! + ( + echo DBUS_SESSION_BUS_PID=$DBUS_SESSION_BUS_PID + echo DBUS_SESSION_BUS_ADDRESS=\""$DBUS_SESSION_BUS_ADDRESS"\" + echo export DBUS_SESSION_BUS_ADDRESS + ) > $PIDFILE + . $PIDFILE +fi & + +dringop() { + part="$1"; shift + op="$1"; shift + dbus-send --session \ + --dest="cx.ring.Ring" /cx/ring/Ring/$part cx.ring.Ring.$part.$op $* +} + +dringopreply() { + part="$1"; shift + op="$1"; shift + dbus-send --session --print-reply \ + --dest="cx.ring.Ring" /cx/ring/Ring/$part cx.ring.Ring.$part.$op $* +} + +firstaccount() { + dringopreply ConfigurationManager getAccountList | \ + grep string | awk -F'"' '{print $2}' | head -n 1 } -trap cleanup EXIT INT QUIT -/usr/lib/grive/grive-sync.sh listen googledrive 2>&1 | sed "s%^%$0:%" & -syncpdi=$! -while true; do - if ! xhost >/dev/null 2>&1 ; then - echo "no DISPLAY, exiting as the user probably logged out" + +account=$(firstaccount) + +if [ -z "$account" ] ; then + echo "Missing local account, trying to create it" + dringop ConfigurationManager addAccount \ + dict:string:string:"Account.type","RING","Account.videoEnabled","false" + account=$(firstaccount) + if [ -z "$account" ] ; then + echo "unable to create local account" 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>&1 | sed "s%^%$0:%" -</pre></blockquote></p> +fi + +# Not using dringopreply to ensure $2 can contain spaces +dbus-send --print-reply --session \ + --dest=cx.ring.Ring \ + /cx/ring/Ring/ConfigurationManager \ + cx.ring.Ring.ConfigurationManager.sendTextMessage \ + string:"$account" string:"$1" \ + dict:string:string:"text/plain","$2" +</pre></p> -<p>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.</p> +<p>If you want to check it out yourself, visit the +<a href="https://jami.net/">the Jami system project page</a> to learn +more, and install the latest Jami client from Debian Unstable or +Testing.</p> <p>As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -387,196 +552,109 @@ activities, please send Bitcoin donations to my address - Valutakrambod - A python and bitcoin love story - http://people.skolelinux.org/pere/blog/Valutakrambod___A_python_and_bitcoin_love_story.html - http://people.skolelinux.org/pere/blog/Valutakrambod___A_python_and_bitcoin_love_story.html - Sat, 29 Sep 2018 22:20:00 +0200 - <p>It would come as no surprise to anyone that I am interested in -bitcoins and virtual currencies. I'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.</p> - -<p>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 -<a href="http://github.com/petterreinholdtsen/valutakrambod">github</a>.</p> - -</p>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:</p> + Boken «Made with Creative Commons» lanseres på norsk + http://people.skolelinux.org/pere/blog/Boken__Made_with_Creative_Commons__lanseres_p__norsk.html + http://people.skolelinux.org/pere/blog/Boken__Made_with_Creative_Commons__lanseres_p__norsk.html + Sun, 15 Nov 2020 23:50:00 +0100 + <p>Endelig er den norske utgaven av «Made with Creative Commons» +ferdig og publisert. Følgende pressemelding ble nettopp sendt ut: + +<blockquote> + +<p><strong>Boken «Made with Creative Commons» lanseres på norsk</strong></p> + +<p>«Gjort med Creative Commons» er en bok om gjenbruk, deling og den +digitale allmenningen. Boken omhandler å bygge en forretningsmodell på +åpne verdier, endringene i tankesett og filosofi, og fordelene og +praksisen som kommer med å være «åpen».</p> + +<p>Forfatterne Paul Stacey og Sarah Hinchliff Pearson tar oss med inn +i samtaler med 24 mennesker, prosjekter og organisasjoner som på ulike +måter generere inntekter gjennom deling av sine verk. Som leser får +man innsikt i hvordan alt fra forskere, forfattere, kunstnere og +filmskapere tjener penger basert på åpne forretningsmodeller. En av +referansestudiene i denne boken viser hvordan Blender Animation Studio +lager vakre animasjonsfilmer som de publiserer under en fri lisens, +basert på en plattform som er fri programvare.</p> + +<p>Utover praktiske eksempler på forskjellige forretningsmodeller berører +også boken forskjellen mellom tradisjonelle kommersielle virksomheter og +de som tar utgangspunkt i den globale delingskulturen.</p> + +<p>«Hvis du ønsker å lære mer om digital delingskultur og Creative Commons +er dette en bok som både vil inspirere og gi grunnleggende innsikt» sier +leder av Creative Commons Norge, Christer Solheim Gundersen. «De siste +årene har denne globale bevegelsen sett en betydelig vekst med totalt +over 1,6 milliarder verk med CC-lisens tilgjengelig på nett.» + +Nå er den tilgjengelig på norsk takket være liten gruppe frivillige +entusiaster ledet av Petter Reinholdtsen. «På vegne av Creative Commons +Norge vil jeg takke hver enkelt bidragsyter. Dette prosjektet er i seg +selv et inspirerende eksempel på at delingskulturen også har godt +fotfeste her i Norge.», avslutter Gundersen.</p> + +<p>Boken er selvsagt fritt tilgjengelig under en Creative Commons lisens, +og kan også kjøpes som ebok og papirutgave på blant annet Lulu.com og +Amazon.</p> + +<p><strong>Lenker og kontaktinformasjon</strong></p> -<p><blockquote><pre> -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("%-15s %s-%s: %8.3f %8.3f" % ( - service.servicename(), - pair[0], - pair[1], - service.rates[pair]['ask'], - service.rates[pair]['bid']) - ) - 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("Interrupted by keyboard, closing all connections.") - pass - for stream in self.streams: - stream.close() -</pre></blockquote></p> +<ul> -<p>The library client loops over all known "public" 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:</p> +<li>Kontaktpunkt: +<br>Ole-Erik Yrvin (oeyrvin@gmail.com) og +<br>Christer Solheim Gundersen (christer@goopen.no), +47 9341 1360</li> -<p><blockquote><pre> -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 -</pre></blockquote></p> +<li>Bokens <a href="https://madewith.cc/">engelske nettside</a></li> -<p>The exchange order book is tracked in addition to the best buy/sell -price, for those that need to know the details.</p> +<li>Den <a href="http://www.hungry.com/~pere/publisher/">norske utgavens nettside</a></li> -<p>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 '-c' argument. Without the argument the "curses" output -is printed without using curses, which is useful for debugging. The -curses view look like this:</p> +<li><a href="https://www.lulu.com/en/us/shop/sarah-hinchliff-pearson-and-paul-stacey-and-bryan-mathers-and-ryan-merkley/gjort-med-creative-commons/paperback/product-m5jy75.html">Papirutgaven fra Lulu</a></li> -<p><blockquote><pre> - 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 -</pre></blockquote></p> +<li><a href="https://www.lulu.com/en/us/shop/sarah-hinchliff-pearson-and-paul-stacey-and-bryan-mathers-and-ryan-merkley/gjort-med-creative-commons/ebook/product-zw2r4k.html">Epub-utgaven fra lulu</a></li> -<p>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.</p> +</ul> -<p>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've -implemented a trading API. It might be the topic of a future blog -post.</p> +</blockquote> -<p>As usual, if you use Bitcoin and want to show your support of my -activities, please send Bitcoin donations to my address -<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p> +<p>Nå håper jeg bare den får mange lesere, og finner veien under mange +juletrær.</p> + +<p>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 +<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>. +Merk, betaling med bitcoin er ikke anonymt. :)</p> - VLC in Debian now can do bittorrent streaming - http://people.skolelinux.org/pere/blog/VLC_in_Debian_now_can_do_bittorrent_streaming.html - http://people.skolelinux.org/pere/blog/VLC_in_Debian_now_can_do_bittorrent_streaming.html - Mon, 24 Sep 2018 21:20:00 +0200 - <p>Back in February, I got curious to see -<a href="http://people.skolelinux.org/pere/blog/Using_VLC_to_stream_bittorrent_sources.html">if -VLC now supported Bittorrent streaming</a>. It did not, despite the -fact that the idea and code to handle such streaming had been floating -around for years. I did however find -<a href="https://github.com/johang/vlc-bittorrent">a standalone plugin -for VLC</a> to do it, and half a year later I decided to wrap up the -plugin and get it into Debian. I uploaded it to NEW a few days ago, -and am very happy to report that it -<a href="https://tracker.debian.org/pkg/vlc-plugin-bittorrent">entered -Debian</a> a few hours ago, and should be available in Debian/Unstable -tomorrow, and Debian/Testing in a few days.</p> - -<p>With the vlc-plugin-bittorrent package installed you should be able -to stream videos using a simple call to</p> - -<p><blockquote><pre> -vlc https://archive.org/download/TheGoat/TheGoat_archive.torrent -</pre></blockquote></p> - -</p>It can handle magnet links too. Now if only native vlc had -bittorrent support. Then a lot more would be helping each other to -share public domain and creative commons movies. The plugin need some -stability work with seeking and picking the right file in a torrent -with many files, but is already usable. Please note that the plugin -is not removing downloaded files when vlc is stopped, so it can fill -up your disk if you are not careful. Have fun. :)</p> - -<p>I would love to get help maintaining this package. Get in touch if -you are interested.</p> + Buster based Bokmål edition of Debian Administrator's Handbook + http://people.skolelinux.org/pere/blog/Buster_based_Bokm_l_edition_of_Debian_Administrator_s_Handbook.html + http://people.skolelinux.org/pere/blog/Buster_based_Bokm_l_edition_of_Debian_Administrator_s_Handbook.html + Tue, 20 Oct 2020 18:35:00 +0200 + <p align="center"><img align="center" src="http://people.skolelinux.org/pere/blog/images/2020-10-20-debian-handbook-nb-testprint.jpeg" width="60%"/></p> + +<p>I am happy to report that we finally made it! Norwegian Bokmål +became the first translation published on paper of the new Buster +based edition of "<a href="https://debian-handbook.info/">The Debian +Administrator's Handbook</a>". The print proof reading copy arrived +some days ago, and it looked good, so now the book is approved for +general distribution. This updated paperback edition <a +href="https://debian-handbook.info/get/#norwegian">is available from +lulu.com</a>. The book is also available for download in electronic +form as PDF, EPUB and Mobipocket, and can also be +<a href="https://debian-handbook.info/browse/nb-NO/stable/">read online</a>.</p> + +<p>I am very happy to wrap up this Creative Common licensed project, +which concludes several months of work by several volunteers. The +number of Linux related books published in Norwegian are few, and I +really hope this one will gain many readers, as it is packed with deep +knowledge on Linux and the Debian ecosystem. The book will be +available for various Internet book stores like Amazon and Barnes & +Noble soon, but I recommend buying +"<a href="https://www.lulu.com/en/us/shop/roland-mas-and-rapha%C3%ABl-hertzog/h%C3%A5ndbok-for-debian-administratoren/paperback/product-9j7qwq.html">Håndbok +for Debian-administratoren</a>" directly from the source at Lulu. <p>As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -585,28 +663,26 @@ activities, please send Bitcoin donations to my address - Using the Kodi API to play Youtube videos - http://people.skolelinux.org/pere/blog/Using_the_Kodi_API_to_play_Youtube_videos.html - http://people.skolelinux.org/pere/blog/Using_the_Kodi_API_to_play_Youtube_videos.html - Sun, 2 Sep 2018 23:40:00 +0200 - <p>I continue to explore my Kodi installation, and today I wanted to -tell it to play a youtube URL I received in a chat, without having to -insert search terms using the on-screen keyboard. After searching the -web for API access to the Youtube plugin and testing a bit, I managed -to find a recipe that worked. If you got a kodi instance with its API -available from http://kodihost/jsonrpc, you can try the following to -have check out a nice cover band.</p> - -<p><blockquote><pre>curl --silent --header 'Content-Type: application/json' \ - --data-binary '{ "id": 1, "jsonrpc": "2.0", "method": "Player.Open", - "params": {"item": { "file": - "plugin://plugin.video.youtube/play/?video_id=LuRGVM9O0qg" } } }' \ - http://projector.local/jsonrpc</pre></blockquote></p> - -<p>I've extended kodi-stream program to take a video source as its -first argument. It can now handle direct video links, youtube links -and 'desktop' to stream my desktop to Kodi. It is almost like a -Chromecast. :)</p> + Buster update of Norwegian Bokmål edition of Debian Administrator's Handbook almost done + http://people.skolelinux.org/pere/blog/Buster_update_of_Norwegian_Bokm_l_edition_of_Debian_Administrator_s_Handbook_almost_done.html + http://people.skolelinux.org/pere/blog/Buster_update_of_Norwegian_Bokm_l_edition_of_Debian_Administrator_s_Handbook_almost_done.html + Fri, 11 Sep 2020 09:45:00 +0200 + <p>Thanks to the good work of several volunteers, the updated edition +of the Norwegian translation for +"<a href="https://debian-handbook.info/">The Debian Administrator's +Handbook</a>" is now almost completed. After many months of proof +reading, I consider the proof reading complete enough for us to move +to the next step, and have asked for the print version to be prepared +and sent of to the print on demand service lulu.com. While it is +still not to late if you find any incorrect translations on +<a href="https://hosted.weblate.org/languages/nb_NO/debian-handbook/">the +hosted Weblate service</a>, but it will be soon. :) You can check out +<a href=" https://debian-handbook.info/browse/nb-NO/stable/">the Buster +edition on the web</a> until the print edition is ready.</p> + +<p>The book will be for sale on lulu.com and various web book stores, +with links available from the web site for the book linked to above. +I hope a lot of readers find it useful.</p> <p>As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -615,78 +691,94 @@ activities, please send Bitcoin donations to my address - Software created using taxpayers’ money should be Free Software - http://people.skolelinux.org/pere/blog/Software_created_using_taxpayers__money_should_be_Free_Software.html - http://people.skolelinux.org/pere/blog/Software_created_using_taxpayers__money_should_be_Free_Software.html - Thu, 30 Aug 2018 13:50:00 +0200 - <p>It might seem obvious that software created using tax money should -be available for everyone to use and improve. Free Software -Foundation Europe recentlystarted a campaign to help get more people -to understand this, and I just signed the petition on -<a href="https://publiccode.eu/">Public Money, Public Code</a> to help -them. I hope you too will do the same.</p> + Working on updated Norwegian Bokmål edition of Debian Administrator's Handbook + http://people.skolelinux.org/pere/blog/Working_on_updated_Norwegian_Bokm_l_edition_of_Debian_Administrator_s_Handbook.html + http://people.skolelinux.org/pere/blog/Working_on_updated_Norwegian_Bokm_l_edition_of_Debian_Administrator_s_Handbook.html + Sat, 4 Jul 2020 23:55:00 +0200 + <p>Three years ago, the first Norwegian Bokmål edition of +"<a href="https://debian-handbook.info/">The Debian Administrator's +Handbook</a>" was published. This was based on Debian Jessie. Now a +new and updated version based on Buster is getting ready. Work on the +updated Norwegian Bokmål edition has been going on for a few months +now, and yesterday, we reached the first mile stone, with 100% of the +texts being translated. A lot of proof reading remains, of course, +but a major step towards a new edition has been taken.</p> + +<p>The book is translated by volunteers, and we would love to get some +help with the proof reading. The translation uses +<a href="https://hosted.weblate.org/languages/nb_NO/debian-handbook/">the +hosted Weblate service</a>, and we welcome everyone to have a look and +submit improvements and suggestions. There is also a proof readers +PDF available on request, get in touch if you want to help out that +way.</p> + +<p>As usual, if you use Bitcoin and want to show your support of my +activities, please send Bitcoin donations to my address +<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p> - A bit more on privacy respecting health monitor / fitness tracker - http://people.skolelinux.org/pere/blog/A_bit_more_on_privacy_respecting_health_monitor___fitness_tracker.html - http://people.skolelinux.org/pere/blog/A_bit_more_on_privacy_respecting_health_monitor___fitness_tracker.html - Mon, 13 Aug 2018 09:00:00 +0200 - <p>A few days ago, I wondered if there are any privacy respecting -health monitors and/or fitness trackers available for sale these days. -I would like to buy one, but do not want to share my personal data -with strangers, nor be forced to have a mobile phone to get data out -of the unit. I've received some ideas, and would like to share them -with you. - -One interesting data point was a pointer to a Free Software app for -Android named -<a href="https://github.com/Freeyourgadget/Gadgetbridge/">Gadgetbridge</a>. -It provide cloudless collection and storing of data from a variety of -trackers. Its -<a href="https://github.com/Freeyourgadget/Gadgetbridge/#supported-devices">list -of supported devices</a> is a good indicator for units where the -protocol is fairly open, as it is obviously being handled by Free -Software. Other units are reportedly encrypting the collected -information with their own public key, making sure only the vendor -cloud service is able to extract data from the unit. The people -contacting me about Gadgetbirde said they were using -<a href="https://us.amazfit.com/shop/bip?variant=336750">Amazfit -Bip</a> and -<a href="http://www.xiaomimi6phone.com/xiaomi-mi-band-3-features-release-date-rumors/">Xiaomi -Band 3</a>.</p> - -<p>I also got a suggestion to look at some of the units from Garmin. -I was told their GPS watches can be connected via USB and show up as a -USB storage device with -<a href="https://www.gpsbabel.org/htmldoc-development/fmt_garmin_fit.html">Garmin -FIT files</a> containing the collected measurements. While -proprietary, FIT files apparently can be read at least by -<a href="https://www.gpsbabel.org">GPSBabel</a> and the -<a href="https://apps.nextcloud.com/apps/gpxpod">GpxPod</a> Nextcloud -app. It is unclear to me if they can read step count and heart rate -data. The person I talked to was using a -<a href="https://buy.garmin.com/en-US/US/p/564291">Garmin Forerunner -935</a>, which is a fairly expensive unit. I doubt it is worth it for -a unit where the vendor clearly is trying its best to move from open -to closed systems. I still remember when Garmin dropped NMEA support -in its GPSes.</p> - -<p>A final idea was to build ones own unit, perhaps by basing it on a -wearable hardware platforms like -<a href="https://learn.adafruit.com/flora-geo-watch">the Flora Geo -Watch</a>. Sound like fun, but I had more money than time to spend on -the topic, so I suspect it will have to wait for another time.</p> - -<p>While I was working on tracking down links, I came across an -inspiring TED talk by Dave Debronkart about -<a href="https://archive.org/details/DavedeBronkart_2010X">being a -e-patient</a>, and discovered the web site -<a href="https://participatorymedicine.org/epatients/">Participatory -Medicine</a>. If you too want to track your own health and fitness -without having information about your private life floating around on -computers owned by others, I recommend checking it out.</p> + Secure Socket API - a simple and powerful approach for TLS support in software + http://people.skolelinux.org/pere/blog/Secure_Socket_API___a_simple_and_powerful_approach_for_TLS_support_in_software.html + http://people.skolelinux.org/pere/blog/Secure_Socket_API___a_simple_and_powerful_approach_for_TLS_support_in_software.html + Sat, 6 Jun 2020 12:40:00 +0200 + <p>As a member of the <a href="https://www.nuug.no/">Norwegian Unix +User Group</a>, I have the pleasure of receiving the +<a href="https://www.usenix.org/">USENIX</a> magazine +<a href="https://www.usenix.org/publications/login/">;login:</a> +several times a year. I rarely have time to read all the articles, +but try to at least skim through them all as there is a lot of nice +knowledge passed on there. I even carry the latest issue with me most +of the time to try to get through all the articles when I have a few +spare minutes.</p> + +<p>The other day I came across a nice article titled +"<a href="https://www.usenix.org/publications/login/winter2018/oneill">The +Secure Socket API: TLS as an Operating System Service</a>" with a +marvellous idea I hope can make it all the way into the POSIX standard. +The idea is as simple as it is powerful. By introducing a new +socket() option IPPROTO_TLS to use TLS, and a system wide service to +handle setting up TLS connections, one both make it trivial to add TLS +support to any program currently using the POSIX socket API, and gain +system wide control over certificates, TLS versions and encryption +systems used. Instead of doing this:</p> + +<p><blockquote><pre> +int socket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); +</pre></blockquote></p> + +<p>the program code would be doing this:<p> + +<p><blockquote><pre> +int socket = socket(PF_INET, SOCK_STREAM, IPPROTO_TLS); +</pre></blockquote></p> + +<p>According to the ;login: article, converting a C program to use TLS +would normally modify only 5-10 lines in the code, which is amazing +when compared to using for example the OpenSSL API.</p> + +<p>The project has set up the +<a href="https://securesocketapi.org/">https://securesocketapi.org/</a> +web site to spread the idea, and the code for a kernel module and the +associated system daemon is available from two github repositories: +<a href="https://github.com/markoneill/ssa">ssa</a> and +<a href="https://github.com/markoneill/ssa-daemon">ssa-daemon</a>. +Unfortunately there is no explicit license information with the code, +so its copyright status is unclear. A +<a href="https://github.com/markoneill/ssa/issues/2">request to solve +this</a> about it has been unsolved since 2018-08-17.</p> + +<p>I love the idea of extending socket() to gain TLS support, and +understand why it is an advantage to implement this as a kernel module +and system wide service daemon, but can not help to think that it +would be a lot easier to get projects to move to this way of setting +up TLS if it was done with a user space approach where programs +wanting to use this API approach could just link with a wrapper +library.</p> + +<p>I recommend you check out this simple and powerful approach to more +secure network connections. :)</p> <p>As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address