blog/archive/2016/01/01.rss

   1 <?xml version="1.0" encoding="ISO-8859-1"?>
   2 <rss version='2.0' xmlns:lj='http://www.livejournal.org/rss/lj/1.0/'>
   3         <channel>
   4                 <title>Petter Reinholdtsen - Entries from January 2016</title>
   5                 <description>Entries from January 2016</description>
   6                 <link>http://people.skolelinux.org/pere/blog/</link>
   7
   8
   9         <item>
  10                 <title>Always download Debian packages using Tor - the simple recipe</title>
  11                 <link>http://people.skolelinux.org/pere/blog/Always_download_Debian_packages_using_Tor___the_simple_recipe.html</link>
  12                 <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Always_download_Debian_packages_using_Tor___the_simple_recipe.html</guid>
  13                 <pubDate>Fri, 15 Jan 2016 00:30:00 +0100</pubDate>
  14                 <description>&lt;p&gt;During his DebConf15 keynote, Jacob Applebaum
  15 &lt;a href=&quot;https://summit.debconf.org/debconf15/meeting/331/what-is-to-be-done/&quot;&gt;observed
  16 that those listening on the Internet lines would have good reason to
  17 believe a computer have a given security hole&lt;/a&gt; if it download a
  18 security fix from a Debian mirror.  This is a good reason to always
  19 use encrypted connections to the Debian mirror, to make sure those
  20 listening do not know which IP address to attack.  In August, Richard
  21 Hartmann observed that encryption was not enough, when it was possible
  22 to interfere download size to security patches or the fact that
  23 download took place shortly after a security fix was released, and
  24 &lt;a href=&quot;http://richardhartmann.de/blog/posts/2015/08/24-Tor-enabled_Debian_mirror/&quot;&gt;proposed
  25 to always use Tor to download packages from the Debian mirror&lt;/a&gt;.  He
  26 was not the first to propose this, as the &lt;tt&gt;apt-transport-tor&lt;/tt&gt;
  27 package by Tim Retout already existed to make it easy to convince apt
  28 to use &lt;a href=&quot;https://www.torproject.org/&quot;&gt;Tor&lt;/a&gt;, but I was not
  29 aware of that package when I read the blog post from Richard.&lt;/p&gt;
  30
  31 &lt;p&gt;Richard discussed the idea with Peter Palfrader, one of the Debian
  32 sysadmins, and he set up a Tor hidden service on one of the central
  33 Debian mirrors using the address vwakviie2ienjx6t.onion, thus making
  34 it possible to download packages directly between two tor nodes,
  35 making sure the network traffic always were encrypted.&lt;/p&gt;
  36
  37 &lt;p&gt;Here is a short recipe for enabling this on your machine, by
  38 installing &lt;tt&gt;apt-transport-tor&lt;/tt&gt; and replacing http and https
  39 urls with tor+http and https, and using the hidden service instead of
  40 the official Debian mirror site.  I recommend installing
  41 &lt;tt&gt;etckeeper&lt;/tt&gt; before you start to have a history of the changes
  42 done in /etc/.&lt;/p&gt;
  43
  44 &lt;blockquote&gt;&lt;pre&gt;
  45 apt install apt-transport-tor
  46 sed -i &#39;s% http://ftp.debian.org/%tor+http://vwakviie2ienjx6t.onion/%&#39; /etc/apt/sources.list
  47 sed -i &#39;s% http% tor+http%&#39; /etc/apt/sources.list
  48 &lt;/pre&gt;&lt;/blockquote&gt;
  49
  50 &lt;p&gt;If you have more sources listed in /etc/apt/sources.list.d/, run
  51 the sed commands for these too.  The sed command is assuming your are
  52 using the ftp.debian.org Debian mirror.  Adjust the command (or just
  53 edit the file manually) to match your mirror.&lt;/p&gt;
  54
  55 &lt;p&gt;This work in Debian Jessie and later.  Note that tools like
  56 &lt;tt&gt;apt-file&lt;/tt&gt; only recently started using the apt transport
  57 system, and do not work with these tor+http URLs.  For
  58 &lt;tt&gt;apt-file&lt;/tt&gt; you need the version currently in experimental,
  59 which need a recent apt version currently only in unstable.  So if you
  60 need a working &lt;tt&gt;apt-file&lt;/tt&gt;, this is not for you.&lt;/p&gt;
  61
  62 &lt;p&gt;Another advantage from this change is that your machine will start
  63 using Tor regularly and at fairly random intervals (every time you
  64 update the package lists or upgrade or install a new package), thus
  65 masking other Tor traffic done from the same machine.  Using Tor will
  66 become normal for the machine in question.&lt;/p&gt;
  67
  68 &lt;p&gt;On &lt;a href=&quot;https://wiki.debian.org/FreedomBox&quot;&gt;Freedombox&lt;/a&gt;, APT
  69 is set up by default to use &lt;tt&gt;apt-transport-tor&lt;/tt&gt; when Tor is
  70 enabled.  It would be great if it was the default on any Debian
  71 system.&lt;/p&gt;
  72 </description>
  73         </item>
  74
  75         <item>
  76                 <title>Nedlasting fra NRK, som Matroska med undertekster</title>
  77                 <link>http://people.skolelinux.org/pere/blog/Nedlasting_fra_NRK__som_Matroska_med_undertekster.html</link>
  78                 <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Nedlasting_fra_NRK__som_Matroska_med_undertekster.html</guid>
  79                 <pubDate>Sat, 2 Jan 2016 13:50:00 +0100</pubDate>
  80                 <description>&lt;p&gt;Det kommer stadig nye løsninger for å ta lagre unna innslag fra NRK
  81 for å se på det senere.  For en stund tilbake kom jeg over et script
  82 nrkopptak laget av Ingvar Hagelund.  Han fjernet riktignok sitt script
  83 etter forespørsel fra Erik Bolstad i NRK, men noen tok heldigvis og
  84 gjorde det &lt;a href=&quot;https://github.com/liangqi/nrkopptak&quot;&gt;tilgjengelig
  85 via github&lt;/a&gt;.&lt;/p&gt;
  86
  87 &lt;p&gt;Scriptet kan lagre som MPEG4 eller Matroska, og bake inn
  88 undertekster i fila på et vis som blant annet VLC forstår.  For å
  89 bruke scriptet, kopier ned git-arkivet og kjør&lt;/p&gt;
  90
  91 &lt;p&gt;&lt;pre&gt;
  92 nrkopptak/bin/nrk-opptak k &lt;ahref=&quot;https://tv.nrk.no/serie/bmi-turne/MUHH45000115/sesong-1/episode-1&quot;&gt;https://tv.nrk.no/serie/bmi-turne/MUHH45000115/sesong-1/episode-1&lt;/a&gt;
  93 &lt;/pre&gt;&lt;/p&gt;
  94
  95 &lt;p&gt;URL-eksemplet er dagens toppsak på tv.nrk.no.  Argument &#39;k&#39; ber
  96 scriptet laste ned og lagre som Matroska.  Det finnes en rekke andre
  97 muligheter for valg av kvalitet og format.&lt;/p&gt;
  98
  99 &lt;p&gt;Jeg foretrekker dette scriptet fremfor youtube-dl, som
 100 &lt;a href=&quot;http://people.skolelinux.org/pere/blog/Hvordan_enkelt_laste_ned_filmer_fra_NRK_med_den__nye__l_sningen.html&quot;&gt;
 101 nevnt i 2014 støtter NRK&lt;/a&gt; og en rekke andre videokilder, på grunn
 102 av at nrkopptak samler undertekster og video i en enkelt fil, hvilket
 103 gjør håndtering enklere på disk.&lt;/p&gt;
 104 </description>
 105         </item>
 106
 107         </channel>
 108 </rss>