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  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 April 2012.</h3>
  23
  24     <div class="entry">
  25       <div class="title">
  26         <a href="http://people.skolelinux.org/pere/blog/Debian_Edu_interview__Wolfgang_Schweer.html">Debian Edu interview: Wolfgang Schweer</a>
  27       </div>
  28       <div class="date">
  29          1st April 2012
  30       </div>
  31       <div class="body">
  32         <p>Germany is a core area for the
  33 <a href="http://www.skolelinux.org/">Debian Edu and Skolelinux</a>
  34 user community, and this time I managed to get hold of Wolfgang
  35 Schweer, a valuable contributor to the project from Germany.
  36
  37 <p><strong>Who are you, and how do you spend your days?</strong></p>
  38
  39 <p>I've studied Mathematics at the university 'Ruhr-Universität' in
  40 Bochum, Germany. Since 1981 I'm working as a teacher at the school
  41 "<a href="http://www.westfalenkolleg-dortmund.de/">Westfalen-Kolleg
  42 Dortmund</a>", a second chance school.  Here, young adults is given
  43 the opportunity to get further education in order to do the school
  44 examination 'Abitur', which will allow to study at a university. This
  45 second chance is of value for those who want a better job perspective
  46 or failed to get a higher school examination being teens.</p>
  47
  48 <p>Besides teaching I was involved in developing online courses for a
  49 blended learning project called 'abitur-online.nrw' and in some other
  50 information technology related projects. For about ten years I've been
  51 teacher and coordinator for the 'abitur-online' project at my
  52 school. Being now in my early sixties, I've decided to leave school at
  53 the end of April this year.</p>
  54
  55 <p><strong>How did you get in contact with the Skolelinux/Debian Edu
  56 project?</strong></p>
  57
  58 <p>The first information about Skolelinux must have come to my
  59 attention years ago and somehow related to LTSP (Linux Terminal Server
  60 Project).  At school, we had set up a network at the beginning of 1997
  61 using Suse Linux on the desktop, replacing a Novell network. Since
  62 2002, we used old machines from the city council of Dortmund as thin
  63 clients (LTSP, later Ubuntu/Lessdisks) cause new hardware was out of
  64 reach. At home I'm using Debian since years and - subscribed to the
  65 Debian news letter - heard from time to time about Skolelinux. About
  66 two years ago I proposed to replace the (somehow undocumented and only
  67 known to me) system at school by a well known Debian based system:
  68 Skolelinux.</p>
  69
  70 <p>Students and teachers appreciated the new system because of a
  71 better look and feel and an enhanced access to local media on thin
  72 clients.  The possibility to alter and/or reset passwords using a GUI
  73 was welcomed, too. Being able to do administrative tasks using a GUI
  74 and to easily set up workstations using PXE was of very high value for
  75 the admin teachers.</p>
  76
  77 <p><strong>What do you see as the advantages of Skolelinux/Debian
  78 Edu?</strong></p>
  79
  80 <p>It's open source, easy to set up, stable and flexible due to it's
  81 Debian base. It integrates LTSP out-of-the-box. And it is documented!
  82 So it was a perfect choice.</p>
  83
  84 <p>Being open source, there are no license problems and so it's
  85 possible to point teachers and students to programs like
  86 OpenOffice.org, ViewYourMind (mind mapping) and The Gimp.  It's of
  87 high value to be able to adapt parts of the system to special needs of
  88 a school and to choose where to get support for this.</p>
  89
  90 <p><strong>What do you see as the disadvantages of Skolelinux/Debian
  91 Edu?</strong></p>
  92
  93 <p>Nothing yet.</p>
  94
  95 <p><strong>Which free software do you use daily?</strong></p>
  96
  97 <p>At home (Debian Sid with Gnome Desktop): Iceweasel, LibreOffice,
  98 Mutt, Gedit, Document Viewer, Midnight Commander, flpsed (PDF
  99 Annotator).  At school (Skolelinux Lenny): Iceweasel, Gedit,
 100 LibreOffice.</p>
 101
 102 <p><strong>Which strategy do you believe is the right one to use to
 103 get schools to use free software?</strong></p>
 104
 105 <p>Some time ago I thought it was enough to tell people about it. But
 106 that doesn't seem to work quite well. Now I concentrate on those more
 107 interested and hope to get multiplicators that way.</p>
 108
 109       </div>
 110       <div class="tags">
 111
 112
 113         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/intervju">intervju</a>.
 114
 115
 116       </div>
 117     </div>
 118     <div class="padding"></div>
 119
 120     <div class="entry">
 121       <div class="title">
 122         <a href="http://people.skolelinux.org/pere/blog/Debian_Edu_in_the_Linux_Weekly_News.html">Debian Edu in the Linux Weekly News</a>
 123       </div>
 124       <div class="date">
 125          5th April 2012
 126       </div>
 127       <div class="body">
 128         <p>About two weeks ago, I was interviewed via email about
 129 <a href="http://www.skolelinux.org/">Debian Edu and Skolelinux</a> by
 130 Bruce Byfield in Linux Weekly News.  The result was made public for
 131 non-subscribers today.  I am pleased to see liked our Linux solution
 132 for schools.  Check out his article
 133 <a href="https://lwn.net/Articles/488805/">Debian Edu/Skolelinux: A
 134 distribution for education</a> if you want to learn more.</p>
 135
 136       </div>
 137       <div class="tags">
 138
 139
 140         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>.
 141
 142
 143       </div>
 144     </div>
 145     <div class="padding"></div>
 146
 147     <div class="entry">
 148       <div class="title">
 149         <a href="http://people.skolelinux.org/pere/blog/Why_the_KDE_menu_is_slow_when__usr__is_NFS_mounted___and_a_workaround.html">Why the KDE menu is slow when /usr/ is NFS mounted - and a workaround</a>
 150       </div>
 151       <div class="date">
 152          6th April 2012
 153       </div>
 154       <div class="body">
 155         <p>Recently I have spent time with
 156 <a href="http://www.slxdrift.no/">Skolelinux Drift AS</a> on speeding
 157 up a <a href="http://www.skolelinux.org/">Debian Edu / Skolelinux</a>
 158 Lenny installation using LTSP diskless workstations, and in the
 159 process I discovered something very surprising.  The reason the KDE
 160 menu was responding slow when using it for the first time, was mostly
 161 due to the way KDE find application icons.  I discovered that showing
 162 the Multimedia menu would cause more than 20 000 IP packages to be
 163 passed between the LTSP client and the NFS server.  Most of these were
 164
 165 NFS LOOKUP calls, resulting in a NFS3ERR_NOENT response.  Because the
 166 ping times between the client and the server were in the range 2-20
 167 ms, the menus would be very slow.  Looking at the strace of kicker in
 168 Lenny (or plasma-desktop i Squeeze - same problem there), I see that
 169 the source of these NFS calls are access(2) system calls for
 170 non-existing files.  KDE can do hundreds of access(2) calls to find
 171 one icon file.  In my example, just finding the mplayer icon required
 172 around 230 access(2) calls.</p>
 173
 174 <p>The KDE code seem to search for icons using a list of icon
 175 directories, and the list of possible directories is large.  In
 176 (almost) each directory, it look for files ending in .png, .svgz, .svg
 177 and .xpm.  The result is a very slow KDE menu when /usr/ is NFS
 178 mounted.  Showing a single sub menu may result in thousands of NFS
 179 requests.  I am not the first one to discover this.  I found a
 180 <a href="https://bugs.kde.org/show_bug.cgi?id=211416">KDE bug report
 181 from 2009</a> about this problem, and it is still unsolved.</p>
 182
 183 <p>My solution to speed up the KDE menu was to create a package
 184 kde-icon-cache that upon installation will look at all .desktop files
 185 used to generate the KDE menu, find their icons, search the icon paths
 186 for the file that KDE will end up finding at run time, and copying the
 187 icon file to /var/lib/kde-icon-cache/.  Finally, I add symlinks to
 188 these icon files in one of the first directories where KDE will look
 189 for them.  This cut down the number of file accesses required to find
 190 one icon from several hundred to less than 5, and make the KDE menu
 191 almost instantaneous.  I'm not quite sure where to make the package
 192 publicly available, so for now it is only available on request.</p>
 193
 194 <p>The bug report mention that this do not only affect the KDE menu
 195 and icon handling, but also the login process.  Not quite sure how to
 196 speed up that part without replacing NFS with for example NBD, and
 197 that is not really an option at the moment.</p>
 198
 199 <p>If you got feedback on this issue, please let us know on debian-edu
 200 (at) lists.debian.org.</p>
 201
 202       </div>
 203       <div class="tags">
 204
 205
 206         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>.
 207
 208
 209       </div>
 210     </div>
 211     <div class="padding"></div>
 212
 213     <div class="entry">
 214       <div class="title">
 215         <a href="http://people.skolelinux.org/pere/blog/Debian_Edu_interview__Justin_B__Rye.html">Debian Edu interview: Justin B. Rye</a>
 216       </div>
 217       <div class="date">
 218          8th April 2012
 219       </div>
 220       <div class="body">
 221         <p>It take all kind of contributions to create a Linux distribution
 222 like <a href="http://www.skolelinux.org/">Debian Edu / Skolelinux</a>,
 223 and this time I lend the ear to Justin B. Rye, who is listed as a big
 224 contributor to the
 225 <a href="http://wiki.debian.org/DebianEdu/Documentation/Squeeze">Debian
 226 Edu Squeeze release manual</a>.
 227
 228 <p><strong>Who are you, and how do you spend your days?</strong></p>
 229
 230 <p>I'm a 44-year-old linguistics graduate living in Edinburgh who has
 231 occasionally been employed as a sysadmin.</p>
 232
 233 <p><strong>How did you get in contact with the Skolelinux/Debian Edu
 234 project?</strong></p>
 235
 236 <p>I'm neither a developer nor a Skolelinux/Debian Edu user!  The only
 237 reason my name's in the credits for the documentation is that I hang
 238 around on debian-l10n-english waiting for people to mention things
 239 they'd like a native English speaker to proofread...  So I did a sweep
 240 through the wiki for typos and Norglish and inconsistent spellings of
 241 "localisation".</p>
 242
 243 <p><strong>What do you see as the advantages of Skolelinux/Debian
 244 Edu?</strong></p>
 245
 246 <p><strong>What do you see as the disadvantages of Skolelinux/Debian
 247 Edu?</strong></p>
 248
 249 <p>These questions are too hard for me - I don't use it!  In fact I
 250 had hardly any contact with I.T. until long after I'd got out of the
 251 education system.</p>
 252
 253 <p>I can tell you the advantages of Debian for me though: it soaks up
 254 as much of my free time as I want and no more, and lets me do
 255 everything I want a computer for without ever forcing me to spend
 256 money on the latest hardware.</p>
 257
 258 <p><strong>Which free software do you use daily?</strong></p>
 259
 260 <p>I've been using Debian since Rex; popularity-contest says the
 261 software that I use most is xinit, xterm, and xulrunner (in other
 262 words, I use a distinctly retro sort of desktop).</p>
 263
 264 <p><strong>Which strategy do you believe is the right one to use to
 265 get schools to use free software?</strong></p>
 266
 267 <p>Well, I don't know.  I suppose I'd be inclined to try reasoning
 268 with the people who make the decisions, but obviously if that worked
 269 you would hardly need a strategy.</p>
 270
 271       </div>
 272       <div class="tags">
 273
 274
 275         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/intervju">intervju</a>.
 276
 277
 278       </div>
 279     </div>
 280     <div class="padding"></div>
 281
 282     <div class="entry">
 283       <div class="title">
 284         <a href="http://people.skolelinux.org/pere/blog/Jeg_skal_p__konferansen_Go_Open_2012.html">Jeg skal på konferansen Go Open 2012</a>
 285       </div>
 286       <div class="date">
 287         13th April 2012
 288       </div>
 289       <div class="body">
 290         <p>Jeg har tenkt meg på konferansen <a href="http://www.goopen.no/">Go
 291 Open 2012</a> i Oslo 23. april.
 292 <a href="http://www.nuug.no/">Medlemsforeningen NUUG</a> deler ut
 293 <a href="http://www.nuug.no/prisen/">prisen for fremme av fri
 294 programvare i Norge</a> der i år.  Kommer du?</p>
 295
 296       </div>
 297       <div class="tags">
 298
 299
 300         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>, <a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug</a>.
 301
 302
 303       </div>
 304     </div>
 305     <div class="padding"></div>
 306
 307     <p style="text-align: right;"><a href="04.rss"><img src="http://people.skolelinux.org/pere/blog/xml.gif" alt="RSS Feed" width="36" height="14" /></a></p>
 308     <div id="sidebar">
 309
 310
 311
 312 <h2>Archive</h2>
 313 <ul>
 314
 315 <li>2012
 316 <ul>
 317
 318 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 319
 320 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 321
 322 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 323
 324 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (5)</a></li>
 325
 326 </ul></li>
 327
 328 <li>2011
 329 <ul>
 330
 331 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 332
 333 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 334
 335 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 336
 337 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 338
 339 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 340
 341 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 342
 343 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 344
 345 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 346
 347 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 348
 349 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 350
 351 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 352
 353 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 354
 355 </ul></li>
 356
 357 <li>2010
 358 <ul>
 359
 360 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 361
 362 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 363
 364 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 365
 366 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 367
 368 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 369
 370 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 371
 372 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 373
 374 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 375
 376 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 377
 378 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 379
 380 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 381
 382 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 383
 384 </ul></li>
 385
 386 <li>2009
 387 <ul>
 388
 389 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 390
 391 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 392
 393 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 394
 395 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 396
 397 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 398
 399 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 400
 401 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 402
 403 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 404
 405 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 406
 407 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 408
 409 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 410
 411 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 412
 413 </ul></li>
 414
 415 <li>2008
 416 <ul>
 417
 418 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 419
 420 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 421
 422 </ul></li>
 423
 424 </ul>
 425
 426
 427
 428 <h2>Tags</h2>
 429 <ul>
 430
 431  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (13)</a></li>
 432
 433  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 434
 435  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 436
 437  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (2)</a></li>
 438
 439  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (12)</a></li>
 440
 441  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 442
 443  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (54)</a></li>
 444
 445  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (97)</a></li>
 446
 447  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (7)</a></li>
 448
 449  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (121)</a></li>
 450
 451  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (15)</a></li>
 452
 453  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
 454
 455  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (22)</a></li>
 456
 457  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (15)</a></li>
 458
 459  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (8)</a></li>
 460
 461  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (4)</a></li>
 462
 463  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 464
 465  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (14)</a></li>
 466
 467  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (157)</a></li>
 468
 469  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (121)</a></li>
 470
 471  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 472
 473  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (24)</a></li>
 474
 475  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (46)</a></li>
 476
 477  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (1)</a></li>
 478
 479  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 480
 481  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (2)</a></li>
 482
 483  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (4)</a></li>
 484
 485  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 486
 487  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (4)</a></li>
 488
 489  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (23)</a></li>
 490
 491  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 492
 493  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (24)</a></li>
 494
 495  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (1)</a></li>
 496
 497  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (3)</a></li>
 498
 499  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (9)</a></li>
 500
 501  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (6)</a></li>
 502
 503  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (23)</a></li>
 504
 505  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (1)</a></li>
 506
 507  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (18)</a></li>
 508
 509 </ul>
 510
 511
 512     </div>
 513     <p style="text-align: right">
 514  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.4</a>
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