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6 <title>Petter Reinholdtsen: entries from November
2014</title>
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15 <a href=
"http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen
</a>
22 <h3>Entries from November
2014.
</h3>
26 <a href=
"http://people.skolelinux.org/pere/blog/How_to_stay_with_sysvinit_in_Debian_Jessie.html">How to stay with sysvinit in Debian Jessie
</a>
32 <p>By now, it is well known that Debian Jessie will not be using
33 sysvinit as its boot system by default. But how can one keep using
34 sysvinit in Jessie? It is fairly easy, and here are a few recipes,
36 <a href=
"http://www.vitavonni.de/blog/201410/2014102101-avoiding-systemd.html">Erich
38 <a href=
"http://smcv.pseudorandom.co.uk/2014/still_universal/">Simon
41 <p>If you already are using Wheezy and want to upgrade to Jessie and
42 keep sysvinit as your boot system, create a file
43 <tt>/etc/apt/preferences.d/use-sysvinit
</tt> with this content before
50 </pre></blockquote><p>
52 <p>This file content will tell apt and aptitude to not consider
53 installing systemd-sysv as part of any installation and upgrade
54 solution when resolving dependencies, and thus tell it to avoid
55 systemd as a default boot system. The end result should be that the
56 upgraded system keep using sysvinit.
</p>
58 <p>If you are installing Jessie for the first time, there is no way to
59 get sysvinit installed by default (debootstrap used by
60 debian-installer have no option for this), but one can tell the
61 installer to switch to sysvinit before the first boot. Either by
62 using a kernel argument to the installer, or by adding a line to the
63 preseed file used. First, the kernel command line argument:
66 preseed/
late_command="in-target apt-get install -y sysvinit-core"
67 </pre></blockquote><p>
69 <p>Next, the line to use in a preseed file:
</p>
72 d-i preseed/late_command string in-target apt-get install -y sysvinit-core
73 </pre></blockquote><p>
75 <p>One can of course also do this after the first boot by installing
76 the sysvinit-core package.
</p>
78 <p>I recommend only using sysvinit if you really need it, as the
79 sysvinit boot sequence in Debian have several hardware specific bugs
80 on Linux caused by the fact that it is unpredictable when hardware
81 devices show up during boot. But on the other hand, the new default
82 boot system still have a few rough edges I hope will be fixed before
83 Jessie is released.
</p>
89 Tags:
<a href=
"http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/debian">debian
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/english">english
</a>.
94 <div class=
"padding"></div>
98 <a href=
"http://people.skolelinux.org/pere/blog/Hvordan_vurderer_regjeringen_H_264_patentutfordringen_.html">Hvordan vurderer regjeringen H
.264-patentutfordringen?
</a>
104 <p>For en stund tilbake spurte jeg Fornyingsdepartementet om hvilke
105 juridiske vurderinger rundt patentproblemstillingen som var gjort da
106 H
.264 ble tatt inn i
<a href=
"http://standard.difi.no/">statens
107 referansekatalog over standarder
</a>. Stig Hornnes i FAD tipset meg
108 om følgende som står i oppsumeringen til høringen om
109 referansekatalogen versjon
2.0, som jeg siden ved hjelp av en
110 innsynsforespørsel fikk tak i
111 <a href=
"http://wiki.nuug.no/uttalelser/200901-standardkatalog-v2?action=AttachFile&do=get&target=kongelig-resolusjon.pdf">PDF-utgaven av
</a>
112 datert
2009-
06-
03 (saksnummer
200803291, saksbehandler Henrik
115 <p>Der står det følgende om problemstillingen:
</p>
118 <strong>4.4 Patentproblematikk
</strong>
120 <p>NUUG og Opera ser det som særlig viktig at forslagene knyttet til
121 lyd og video baserer seg på de royalty-frie standardene Vorbis, Theora
124 <p>Kommentarene relaterer seg til at enkelte standarder er åpne, men
125 inneholder tekniske prosedyrer som det i USA (og noen andre land som
126 Japan) er gitt patentrettigheter til. I vårt tilfelle berører dette
127 spesielt standardene Mp3 og H
.264, selv om Politidirektoratet peker på
128 at det muligens kan være tilsvarende problematikk også for Theora og
129 Vorbis. Dette medfører at det i USA kan kreves royalties for bruk av
130 tekniske løsninger knyttet til standardene, et krav som også
131 håndheves. Patenter kan imidlertid bare hevdes i de landene hvor
132 patentet er gitt, så amerikanske patenter gjelder ikke andre steder
135 <p>Spesielt for utvikling av fri programvare er patenter
136 problematisk. GPL, en "grunnleggende" lisens for distribusjon av fri
137 programvare, avviser at programvare kan distribueres under denne
138 lisensen hvis det inneholder referanser til patenterte rutiner som
139 utløser krav om royalties. Det er imidlertid uproblematisk å
140 distribuere fri programvareløsninger under GPL som benytter de
141 aktuelle standardene innen eller mellom land som ikke anerkjenner
142 patentene. Derfor finner vi også flere implementeringer av Mp3 og
143 H
.264 som er fri programvare, lisensiert under GPL.
</p>
145 <p>I Norge og EU er patentlovgivningen langt mer restriktiv enn i USA,
146 men det er også her mulig å få patentert metoder for løsning av et
147 problem som relaterer seg til databehandling. Det er AIF bekjent ikke
148 relevante patenter i EU eller Norge hva gjelder H
.264 og Mp3, men
149 muligheten for at det finnes patenter uten at det er gjort krav om
150 royalties eller at det senere vil gis slike patenter kan ikke helt
153 <p>AIF mener det er et behov for å gi offentlige virksomheter mulighet
154 til å benytte antatt royaltyfrie åpne standarder som et likeverdig
155 alternativ eller i tillegg til de markedsledende åpne standardene.
</p>
159 <p>Det ser dermed ikke ut til at de har vurdert patentspørsmålet i
160 sammenheng med opphavsrettsvilkår slik de er formulert for f.eks.
161 Apple Final Cut Pro, Adobe Premiere Pro, Avid og Sorenson-verktøyene,
162 der det kreves brukstillatelse for patenter som ikke er gyldige i
163 Norge for å bruke disse verktøyene til annet en personlig og ikke
164 kommersiell aktivitet når det gjelder H
.264-video. Jeg må nok lete
165 videre etter svar på det spørsmålet.
</p>
171 Tags:
<a href=
"http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/norsk">norsk
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/standard">standard
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/video">video
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/web">web
</a>.
176 <div class=
"padding"></div>
180 <a href=
"http://people.skolelinux.org/pere/blog/A_Debian_package_for_SMTP_via_Tor__aka_SMTorP__using_exim4.html">A Debian package for SMTP via Tor (aka SMTorP) using exim4
</a>
186 <p>The right to communicate with your friends and family in private,
187 without anyone snooping, is a right every citicen have in a liberal
188 democracy. But this right is under serious attack these days.
</p>
190 <p>A while back it occurred to me that one way to make the dragnet
191 surveillance conducted by NSA, GCHQ, FRA and others (and confirmed by
192 the whisleblower Snowden) more expensive for Internet email,
193 is to deliver all email using SMTP via Tor. Such SMTP option would be
194 a nice addition to the FreedomBox project if we could send email
195 between FreedomBox machines without leaking metadata about the emails
196 to the people peeking on the wire. I
197 <a href=
"http://lists.alioth.debian.org/pipermail/freedombox-discuss/2014-October/006493.html">proposed
198 this on the FreedomBox project mailing list in October
</a> and got a
199 lot of useful feedback and suggestions. It also became obvious to me
200 that this was not a novel idea, as the same idea was tested and
201 documented by Johannes Berg as early as
2006, and both
202 <a href=
"https://github.com/pagekite/Mailpile/wiki/SMTorP">the
203 Mailpile
</a> and
<a href=
"http://dee.su/cables">the Cables
</a> systems
204 propose a similar method / protocol to pass emails between users.
</p>
206 <p>To implement such system one need to set up a Tor hidden service
207 providing the SMTP protocol on port
25, and use email addresses
208 looking like username@hidden-service-name.onion. With such addresses
209 the connections to port
25 on hidden-service-name.onion using Tor will
210 go to the correct SMTP server. To do this, one need to configure the
211 Tor daemon to provide the hidden service and the mail server to accept
212 emails for this .onion domain. To learn more about Exim configuration
213 in Debian and test the design provided by Johannes Berg in his FAQ, I
214 set out yesterday to create a Debian package for making it trivial to
215 set up such SMTP over Tor service based on Debian. Getting it to work
216 were fairly easy, and
217 <a href=
"https://github.com/petterreinholdtsen/exim4-smtorp">the
218 source code for the Debian package
</a> is available from github. I
219 plan to move it into Debian if further testing prove this to be a
222 <p>If you want to test this, set up a blank Debian machine without any
223 mail system installed (or run
<tt>apt-get purge exim4-config
</tt> to
224 get rid of exim4). Install tor, clone the git repository mentioned
225 above, build the deb and install it on the machine. Next, run
226 <tt>/usr/lib/exim4-smtorp/setup-exim-hidden-service
</tt> and follow
227 the instructions to get the service up and running. Restart tor and
228 exim when it is done, and test mail delivery using swaks like
232 torsocks swaks --server dutlqrrmjhtfa3vp.onion \
233 --to fbx@dutlqrrmjhtfa3vp.onion
234 </pre></blockquote></p>
236 <p>This will test the SMTP delivery using tor. Replace the email
237 address with your own address to test your server. :)
</p>
239 <p>The setup procedure is still to complex, and I hope it can be made
240 easier and more automatic. Especially the tor setup need more work.
241 Also, the package include a tor-smtp tool written in C, but its task
242 should probably be rewritten in some script language to make the deb
243 architecture independent. It would probably also make the code easier
244 to review. The tor-smtp tool currently need to listen on a socket for
245 exim to talk to it and is started using xinetd. It would be better if
246 no daemon and no socket is needed. I suspect it is possible to get
247 exim to run a command line tool for delivery instead of talking to a
248 socket, and hope to figure out how in a future version of this
251 <p>Until I wipe my test machine, I can be reached using the
252 <tt>fbx@dutlqrrmjhtfa3vp.onion
</tt> mail address, deliverable over
259 Tags:
<a href=
"http://people.skolelinux.org/pere/blog/tags/debian">debian
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/english">english
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/personvern">personvern
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance
</a>.
264 <div class=
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</a></li>
494 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (
12)
</a></li>
496 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (
13)
</a></li>
498 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (
9)
</a></li>
500 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (
11)
</a></li>
502 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/intervju">intervju (
41)
</a></li>
504 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (
10)
</a></li>
506 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/kart">kart (
19)
</a></li>
508 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/ldap">ldap (
9)
</a></li>
510 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/lenker">lenker (
8)
</a></li>
512 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (
2)
</a></li>
514 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (
1)
</a></li>
516 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (
8)
</a></li>
518 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (
32)
</a></li>
520 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/norsk">norsk (
249)
</a></li>
522 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/nuug">nuug (
163)
</a></li>
524 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (
11)
</a></li>
526 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/open311">open311 (
2)
</a></li>
528 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (
49)
</a></li>
530 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/personvern">personvern (
76)
</a></li>
532 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/raid">raid (
1)
</a></li>
534 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/reactos">reactos (
1)
</a></li>
536 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/reprap">reprap (
11)
</a></li>
538 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/rfid">rfid (
3)
</a></li>
540 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/robot">robot (
9)
</a></li>
542 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/rss">rss (
1)
</a></li>
544 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/ruter">ruter (
4)
</a></li>
546 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (
2)
</a></li>
548 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (
41)
</a></li>
550 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (
4)
</a></li>
552 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (
4)
</a></li>
554 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/standard">standard (
46)
</a></li>
556 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (
3)
</a></li>
558 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (
9)
</a></li>
560 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (
27)
</a></li>
562 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (
2)
</a></li>
564 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/valg">valg (
8)
</a></li>
566 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/video">video (
45)
</a></li>
568 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (
4)
</a></li>
570 <li><a href=
"http://people.skolelinux.org/pere/blog/tags/web">web (
34)
</a></li>
576 <p style=
"text-align: right">
577 Created by
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