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  13     <div class="title">
  14  <h1>
  15      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  16
  17  </h1>
  18
  19 </div>
  20
  21
  22     <h3>Entries from October 2013.</h3>
  23
  24     <div class="entry">
  25       <div class="title">
  26         <a href="http://people.skolelinux.org/pere/blog/Oslo_community_mesh_network___with_NUUG_and_Hackeriet_at_Hausmania.html">Oslo community mesh network - with NUUG and Hackeriet at Hausmania</a>
  27       </div>
  28       <div class="date">
  29         11th October 2013
  30       </div>
  31       <div class="body">
  32         <p>Wireless mesh networks are self organising and self healing
  33 networks that can be used to connect computers across small and large
  34 areas, depending on the radio technology used.  Normal wifi equipment
  35 can be used to create home made radio networks, and there are several
  36 successful examples like
  37 <a href="http://www.freifunk.net/">Freifunk</a> and
  38 <a href="http://www.awmn.net/">Athens Wireless Metropolitan Network</a>
  39 (see
  40 <a href="http://en.wikipedia.org/wiki/List_of_wireless_community_networks_by_region#Greece">wikipedia
  41 for a large list</a>) around the globe.  To give you an idea how it
  42 work, check out the nice overview of the Kiel Freifunk community which
  43 can be seen from their
  44 <a href="http://freifunk.in-kiel.de/ffmap/nodes.html">dynamically
  45 updated node graph and map</a>, where one can see how the mesh nodes
  46 automatically handle routing and recover from nodes disappearing.
  47 There is also a small community mesh network group in Oslo, Norway,
  48 and that is the main topic of this blog post.</p>
  49
  50 <p>I've wanted to check out mesh networks for a while now, and hoped
  51 to do it as part of my involvement with the <a
  52 href="http://www.nuug.no/">NUUG member organisation</a> community, and
  53 my recent involvement in
  54 <a href="https://wiki.debian.org/FreedomBox">the Freedombox project</a>
  55 finally lead me to give mesh networks some priority, as I suspect a
  56 Freedombox should use mesh networks to connect neighbours and family
  57 when possible, given that most communication between people are
  58 between those nearby (as shown for example by research on Facebook
  59 communication patterns).  It also allow people to communicate without
  60 any central hub to tap into for those that want to listen in on the
  61 private communication of citizens, which have become more and more
  62 important over the years.</p>
  63
  64 <p>So far I have only been able to find one group of people in Oslo
  65 working on community mesh networks, over at the hack space
  66 <a href="http://hackeriet.no/">Hackeriet</a> at Husmania.  They seem to
  67 have started with some Freifunk based effort using OLSR, called
  68 <a href="http://oslo.freifunk.net/index.php?title=Main_Page">the Oslo
  69 Freifunk project</a>, but that effort is now dead and the people
  70 behind it have moved on to a batman-adv based system called
  71 <a href="http://meshfx.org/trac">meshfx</a>.  Unfortunately the wiki
  72 site for the Oslo Freifunk project is no longer possible to update to
  73 reflect this fact, so the old project page can't be updated to point to
  74 the new project.  A while back, the people at Hackeriet invited people
  75 from the Freifunk community to Oslo to talk about mesh networks.  I
  76 came across this video where Hans Jørgen Lysglimt interview the
  77 speakers about this talk (from
  78 <a href="https://www.youtube.com/watch?v=N2Kd7CLkhSY">youtube</a>):</p>
  79
  80 <p><iframe width="420" height="315" src="https://www.youtube.com/embed/N2Kd7CLkhSY" frameborder="0" allowfullscreen></iframe></p>
  81
  82 <p>I mentioned OLSR and batman-adv, which are mesh routing protocols.
  83 There are heaps of different protocols, and I am still struggling to
  84 figure out which one would be "best" for some definitions of best, but
  85 given that the community mesh group in Oslo is so small, I believe it
  86 is best to hook up with the existing one instead of trying to create a
  87 completely different setup, and thus this have decided to focus on
  88 batman-adv for now.  It sure help me to  know that the very cool
  89 <a href="http://www.servalproject.org/">Serval project in Australia</a>
  90 is using batman-adv as their meshing technology when it create a self
  91 organizing and self healing telephony system for disaster areas and
  92 less industrialized communities.  Check out this cool video presenting
  93 that project (from
  94 <a href="https://www.youtube.com/watch?v=30qNfzJCQOA">youtube</a>):</p>
  95
  96 <p><iframe width="560" height="315" src="https://www.youtube.com/embed/30qNfzJCQOA" frameborder="0" allowfullscreen></iframe></p>
  97
  98 <p>According to the wikipedia page on
  99 <a href="http://en.wikipedia.org/wiki/Wireless_mesh_network">Wireless
 100 mesh network</a> there are around 70 competing schemes for routing
 101 packets across mesh networks, and OLSR, B.A.T.M.A.N. and
 102 B.A.T.M.A.N. advanced are protocols used by several free software
 103 based community mesh networks.</p>
 104
 105 <p>The batman-adv protocol is a bit special, as it provide layer 2
 106 (as in ethernet ) routing, allowing ipv4 and ipv6 to work on the same
 107 network.  One way to think about it is that it provide a mesh based
 108 vlan you can bridge to or handle like any other vlan connected to your
 109 computer.  The required drivers are already in the Linux kernel at
 110 least since Debian Wheezy, and it is fairly easy to set up.  A
 111 <a href="http://www.open-mesh.org/projects/batman-adv/wiki/Quick-start-guide">good
 112 introduction</a> is available from the Open Mesh project.  These are
 113 the key settings needed to join the Oslo meshfx network:</p>
 114
 115 <p><table>
 116 <tr><th>Setting</th><th>Value</th></tr>
 117 <tr><td>Protocol / kernel module</td><td>batman-adv</td></tr>
 118 <tr><td>ESSID</td><td>meshfx@hackeriet</td></tr>
 119 <td>Channel / Frequency</td><td>11 / 2462</td></tr>
 120 <td>Cell ID</td><td>02:BA:00:00:00:01</td>
 121 </table></p>
 122
 123 <p>The reason for setting ad-hoc wifi Cell ID is to work around bugs
 124 in firmware used in wifi card and wifi drivers.  (See a nice post from
 125 VillageTelco about
 126 "<a href="http://tiebing.blogspot.no/2009/12/ad-hoc-cell-splitting-re-post-original.html">Information
 127 about cell-id splitting, stuck beacons, and failed IBSS merges!</a>
 128 for details.)  When these settings are activated and you have some
 129 other mesh node nearby, your computer will be connected to the mesh
 130 network and can communicate with any mesh node that is connected to
 131 any of the nodes in your network of nodes. :)</p>
 132
 133 <p>My initial plan was to reuse my old Linksys WRT54GL as a mesh node,
 134 but that seem to be very hard, as I have not been able to locate a
 135 firmware supporting batman-adv.  If anyone know how to use that old
 136 wifi access point with batman-adv these days, please let me know.</p>
 137
 138 <p>If you find this project interesting and want to join, please join
 139 us on IRC, either channel
 140 <a href="irc://irc.freenode.net/#oslohackerspace">#oslohackerspace</a>
 141 or <a href="irc://irc.freenode.net/#nuug">#nuug</a> on
 142 irc.freenode.net.</p>
 143
 144 <p>While investigating mesh networks in Oslo, I came across an old
 145 research paper from the university of Stavanger and Telenor Research
 146 and Innovation called
 147 <a href="http://folk.uio.no/paalee/publications/netrel-egeland-iswcs-2008.pdf">The
 148 reliability of wireless backhaul mesh networks</a> and elsewhere
 149 learned that Telenor have been experimenting with mesh networks at
 150 Grünerløkka in Oslo.  So mesh networks are also interesting for
 151 commercial companies, even though Telenor discovered that it was hard
 152 to figure out a good business plan for mesh networking and as far as I
 153 know have closed down the experiment.  Perhaps Telenor or others would
 154 be interested in a cooperation?</p>
 155
 156       </div>
 157       <div class="tags">
 158
 159
 160         Tags: <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/nuug">nuug</a>.
 161
 162
 163       </div>
 164     </div>
 165     <div class="padding"></div>
 166
 167     <div class="entry">
 168       <div class="title">
 169         <a href="http://people.skolelinux.org/pere/blog/Skolelinux___Debian_Edu_7_1_install_and_overview_video_from_Marcelo_Salvador.html">Skolelinux / Debian Edu 7.1 install and overview video from Marcelo Salvador</a>
 170       </div>
 171       <div class="date">
 172          8th October 2013
 173       </div>
 174       <div class="body">
 175         <p>The other day I was pleased and surprised to discover that Marcelo
 176 Salvador had published a
 177 <a href="https://www.youtube.com/watch?v=w-GgpdqgLFc">video on
 178 Youtube</a> showing how to install the standalone Debian Edu /
 179 Skolelinux profile.  This is the profile intended for use at home or
 180 on laptops that should not be integrated into the provided network
 181 services (no central home directory, no Kerberos / LDAP directory etc,
 182 in other word a single user machine).  The result is 11 minutes long,
 183 and show some user applications (seem to be rather randomly picked).
 184 Missed a few of my favorites like celestia, planets and chromium
 185 showing the <a href="http://www.zygotebody.com/">Zygote Body 3D model
 186 of the human body</a>, but I guess he did not know about those or find
 187 other programs more interesting. :) And the video do not show the
 188 advantages I believe is one of the most valuable featuers in Debian
 189 Edu, its central school server making it possible to run hundreds of
 190 computers without hard drives by installing one central
 191 <a href="http://www.ltsp.org/">LTSP server</a>.</p>
 192
 193 <p>Anyway, check out the video, embedded below and linked to above:</p>
 194
 195 <iframe width="420" height="315" src="http://www.youtube.com/embed/w-GgpdqgLFc" frameborder="0" allowfullscreen></iframe>
 196
 197 <p>Are there other nice videos demonstrating Skolelinux?  Please let
 198 me know. :)</p>
 199
 200       </div>
 201       <div class="tags">
 202
 203
 204         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/video">video</a>.
 205
 206
 207       </div>
 208     </div>
 209     <div class="padding"></div>
 210
 211     <p style="text-align: right;"><a href="10.rss"><img src="http://people.skolelinux.org/pere/blog/xml.gif" alt="RSS Feed" width="36" height="14" /></a></p>
 212     <div id="sidebar">
 213
 214
 215
 216 <h2>Archive</h2>
 217 <ul>
 218
 219 <li>2013
 220 <ul>
 221
 222 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 223
 224 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 225
 226 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 227
 228 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 229
 230 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 231
 232 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 233
 234 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 235
 236 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 237
 238 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 239
 240 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (2)</a></li>
 241
 242 </ul></li>
 243
 244 <li>2012
 245 <ul>
 246
 247 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 248
 249 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 250
 251 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 252
 253 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 254
 255 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 256
 257 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 258
 259 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 260
 261 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 262
 263 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 264
 265 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 266
 267 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 268
 269 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 270
 271 </ul></li>
 272
 273 <li>2011
 274 <ul>
 275
 276 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 277
 278 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 279
 280 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 281
 282 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 283
 284 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 285
 286 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 287
 288 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 289
 290 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 291
 292 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 293
 294 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 295
 296 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 297
 298 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 299
 300 </ul></li>
 301
 302 <li>2010
 303 <ul>
 304
 305 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 306
 307 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 308
 309 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 310
 311 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 312
 313 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 314
 315 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 316
 317 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 318
 319 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 320
 321 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 322
 323 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 324
 325 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 326
 327 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 328
 329 </ul></li>
 330
 331 <li>2009
 332 <ul>
 333
 334 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 335
 336 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 337
 338 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 339
 340 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 341
 342 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 343
 344 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 345
 346 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 347
 348 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 349
 350 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 351
 352 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 353
 354 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 355
 356 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 357
 358 </ul></li>
 359
 360 <li>2008
 361 <ul>
 362
 363 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 364
 365 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 366
 367 </ul></li>
 368
 369 </ul>
 370
 371
 372
 373 <h2>Tags</h2>
 374 <ul>
 375
 376  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (13)</a></li>
 377
 378  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 379
 380  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 381
 382  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 383
 384  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (7)</a></li>
 385
 386  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (12)</a></li>
 387
 388  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 389
 390  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (86)</a></li>
 391
 392  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (142)</a></li>
 393
 394  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
 395
 396  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (10)</a></li>
 397
 398  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 399
 400  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (219)</a></li>
 401
 402  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (21)</a></li>
 403
 404  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
 405
 406  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (12)</a></li>
 407
 408  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (3)</a></li>
 409
 410  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (11)</a></li>
 411
 412  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (37)</a></li>
 413
 414  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (7)</a></li>
 415
 416  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (18)</a></li>
 417
 418  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (8)</a></li>
 419
 420  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (6)</a></li>
 421
 422  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 423
 424  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (25)</a></li>
 425
 426  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (235)</a></li>
 427
 428  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (154)</a></li>
 429
 430  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (8)</a></li>
 431
 432  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 433
 434  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (44)</a></li>
 435
 436  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (66)</a></li>
 437
 438  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (1)</a></li>
 439
 440  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 441
 442  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (2)</a></li>
 443
 444  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (7)</a></li>
 445
 446  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 447
 448  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (4)</a></li>
 449
 450  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 451
 452  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (31)</a></li>
 453
 454  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 455
 456  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (4)</a></li>
 457
 458  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (43)</a></li>
 459
 460  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (3)</a></li>
 461
 462  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (8)</a></li>
 463
 464  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (18)</a></li>
 465
 466  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (1)</a></li>
 467
 468  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (8)</a></li>
 469
 470  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (39)</a></li>
 471
 472  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 473
 474  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (28)</a></li>
 475
 476 </ul>
 477
 478
 479     </div>
 480     <p style="text-align: right">
 481  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 482 </p>
 483
 484   </body>
 485 </html>