blog/Testing_if_a_file_system_can_be_used_for_home_directories___.html

   1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
   2           "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
   3 <html xmlns="http://www.w3.org/1999/xhtml" dir="ltr">
   4   <head>
   5     <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
   6     <title>Petter Reinholdtsen: Testing if a file system can be used for home directories...</title>
   7     <link rel="stylesheet" type="text/css" media="screen" href="http://people.skolelinux.org/pere/blog/style.css" />
   8     <link rel="stylesheet" type="text/css" media="screen" href="http://people.skolelinux.org/pere/blog/vim.css" />
   9
  10
  11   </head>
  12   <body>
  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     <div class="entry">
  23       <div class="title">Testing if a file system can be used for home directories...</div>
  24       <div class="date"> 8th August 2010</div>
  25       <div class="body"><p>A few years ago, I was involved in a project planning to use
  26 Windows file servers as home directory servers for Debian
  27 Edu/Skolelinux machines.  This was thought to be no problem, as the
  28 access would be through the SMB network file system protocol, and we
  29 knew other sites used SMB with unix and samba as the file server to
  30 mount home directories without any problems.  But, after months of
  31 struggling, we had to conclude that our goal was impossible.</p>
  32
  33 <p>The reason is simply that while SMB can be used for home
  34 directories when the file server is Samba running on Unix, this only
  35 work because of Samba have some extensions and the fact that the
  36 underlying file system is a unix file system.  When using a Windows
  37 file server, the underlying file system do not have POSIX semantics,
  38 and several programs will fail if the users home directory where they
  39 want to store their configuration lack POSIX semantics.</p>
  40
  41 <p>As part of this work, I wrote a small C program I want to share
  42 with you all, to replicate a few of the problematic applications (like
  43 OpenOffice.org and GCompris) and see if the file system was working as
  44 it should.  If you find yourself in spooky file system land, it might
  45 help you find your way out again.  This is the fs-test.c source:</p>
  46
  47 <pre>
  48 /*
  49  * Some tests to check the file system sematics.  Used to verify that
  50  * CIFS from a windows server do not work properly as a linux home
  51  * directory.
  52  * License: GPL v2 or later
  53  *
  54  * needs libsqlite3-dev and build-essential installed
  55  * compile with: gcc -Wall -lsqlite3 -DTEST_SQLITE fs-test.c -o fs-test
  56 */
  57
  58 #define _FILE_OFFSET_BITS 64
  59 #define _LARGEFILE_SOURCE 1
  60 #define _LARGEFILE64_SOURCE 1
  61
  62 #define _GNU_SOURCE /* for asprintf() */
  63
  64 #include &lt;errno.h>
  65 #include &lt;fcntl.h>
  66 #include &lt;stdio.h>
  67 #include &lt;string.h>
  68 #include &lt;stdlib.h>
  69 #include &lt;sys/file.h>
  70 #include &lt;sys/stat.h>
  71 #include &lt;sys/types.h>
  72 #include &lt;unistd.h>
  73
  74 #ifdef TEST_SQLITE
  75 /*
  76  * Test sqlite open, as done by gcompris require the libsqlite3-dev
  77  * package and linking with -lsqlite3.  A more low level test is
  78  * below.
  79  * See also &lt;URL: http://www.sqlite.org./faq.html#q5 >.
  80  */
  81 #include &lt;sqlite3.h>
  82 #define CREATE_TABLE_USERS                                              \
  83   "CREATE TABLE users (user_id INT UNIQUE, login TEXT, lastname TEXT, firstname TEXT, birthdate TEXT, class_id INT ); "
  84 int test_sqlite_open(void) {
  85   char *zErrMsg;
  86   char *name = "testsqlite.db";
  87   sqlite3 *db=NULL;
  88   unlink(name);
  89   int rc = sqlite3_open(name, &db);
  90   if( rc ){
  91     printf("error: sqlite open of %s failed: %s\n", name, sqlite3_errmsg(db));
  92     sqlite3_close(db);
  93     return -1;
  94   }
  95
  96   /* create tables */
  97   rc = sqlite3_exec(db,CREATE_TABLE_USERS, NULL,  0, &zErrMsg);
  98   if( rc != SQLITE_OK ){
  99     printf("error: sqlite table create failed: %s\n", zErrMsg);
 100     sqlite3_close(db);
 101     return -1;
 102   }
 103   printf("info: sqlite worked\n");
 104   sqlite3_close(db);
 105   return 0;
 106 }
 107 #endif /* TEST_SQLITE */
 108
 109 /*
 110  * Demonstrate locking issue found in gcompris using sqlite3.  This
 111  * work with ext3, but not with cifs server on Windows 2003.  This is
 112  * done in the sqlite3 library.
 113  * See also
 114  * &lt;URL:http://www.cygwin.com/ml/cygwin/2001-08/msg00854.html> and the
 115  * POSIX specification
 116  * &lt;URL:http://www.opengroup.org/onlinepubs/009695399/functions/fcntl.html>.
 117  */
 118 int test_gcompris_locking(void) {
 119   struct flock fl;
 120   char *name = "testsqlite.db";
 121   unlink(name);
 122   int fd = open(name, O_RDWR|O_CREAT|O_LARGEFILE, 0644);
 123   printf("info: testing fcntl locking\n");
 124
 125   fl.l_whence = SEEK_SET;
 126   fl.l_pid    = getpid();
 127   printf("  Read-locking 1 byte from 1073741824");
 128   fl.l_start  = 1073741824;
 129   fl.l_len    = 1;
 130   fl.l_type   = F_RDLCK;
 131   if (0 != fcntl(fd, F_SETLK, &fl) ) printf(" - error!\n"); else printf("\n");
 132
 133   printf("  Read-locking 510 byte from 1073741826");
 134   fl.l_start  = 1073741826;
 135   fl.l_len    = 510;
 136   fl.l_type   = F_RDLCK;
 137   if (0 != fcntl(fd, F_SETLK, &fl) ) printf(" - error!\n"); else printf("\n");
 138
 139   printf("  Unlocking 1 byte from 1073741824");
 140   fl.l_start  = 1073741824;
 141   fl.l_len    = 1;
 142   fl.l_type   = F_UNLCK;
 143   if (0 != fcntl(fd, F_SETLK, &fl) ) printf(" - error!\n"); else printf("\n");
 144
 145   printf("  Write-locking 1 byte from 1073741824");
 146   fl.l_start  = 1073741824;
 147   fl.l_len    = 1;
 148   fl.l_type   = F_WRLCK;
 149   if (0 != fcntl(fd, F_SETLK, &fl) ) printf(" - error!\n"); else printf("\n");
 150
 151   printf("  Write-locking 510 byte from 1073741826");
 152   fl.l_start  = 1073741826;
 153   fl.l_len    = 510;
 154   if (0 != fcntl(fd, F_SETLK, &fl) ) printf(" - error!\n"); else printf("\n");
 155
 156   printf("  Unlocking 2 byte from 1073741824");
 157   fl.l_start  = 1073741824;
 158   fl.l_len    = 2;
 159   fl.l_type   = F_UNLCK;
 160   if (0 != fcntl(fd, F_SETLK, &fl) ) printf(" - error!\n"); else printf("\n");
 161
 162   close(fd);
 163   return 0;
 164 }
 165
 166 /*
 167  * Test if permissions of freshly created directories allow entries
 168  * below them.  This was a problem with OpenOffice.org and gcompris.
 169  * Mounting with option 'sync' seem to solve this problem while
 170  * slowing down file operations.
 171  */
 172 int test_subdirectory_creation(void) {
 173 #define LEVELS 5
 174   char *path = strdup("test");
 175   char *dirs[LEVELS];
 176   int level;
 177   printf("info: testing subdirectory creation\n");
 178   for (level = 0; level &lt; LEVELS; level++) {
 179     char *newpath = NULL;
 180     if (-1 == mkdir(path, 0777)) {
 181       printf("  error: Unable to create directory '%s': %s\n",
 182              path, strerror(errno));
 183       break;
 184     }
 185     asprintf(&newpath, "%s/%s", path, "test");
 186     free(path);
 187     path = newpath;
 188   }
 189   return 0;
 190 }
 191
 192 /*
 193  * Test if symlinks can be created.  This was a problem detected with
 194  * KDE.
 195  */
 196 int test_symlinks(void) {
 197   printf("info: testing symlink creation\n");
 198   unlink("symlink");
 199   if (-1 == symlink("file", "symlink"))
 200     printf("  error: Unable to create symlink\n");
 201   return 0;
 202 }
 203
 204 int main(int argc, char **argv) {
 205   printf("Testing POSIX/Unix sematics on file system\n");
 206   test_symlinks();
 207   test_subdirectory_creation();
 208 #ifdef TEST_SQLITE
 209   test_sqlite_open();
 210 #endif /* TEST_SQLITE */
 211   test_gcompris_locking();
 212   return 0;
 213 }
 214 </pre>
 215
 216 <p>When everything is working, it should print something like
 217 this:</p>
 218
 219 <pre>
 220 Testing POSIX/Unix sematics on file system
 221 info: testing symlink creation
 222 info: testing subdirectory creation
 223 info: sqlite worked
 224 info: testing fcntl locking
 225   Read-locking 1 byte from 1073741824
 226   Read-locking 510 byte from 1073741826
 227   Unlocking 1 byte from 1073741824
 228   Write-locking 1 byte from 1073741824
 229   Write-locking 510 byte from 1073741826
 230   Unlocking 2 byte from 1073741824
 231 </pre>
 232
 233 <p>I do not remember the exact details of the problems we saw, but one
 234 of them was with locking, where if I remember correctly, POSIX allow a
 235 read-only lock to be upgraded to a read-write lock without unlocking
 236 the read-only lock (while Windows do not).  Another was a bug in the
 237 CIFS/SMB client implementation in the Linux kernel where directory
 238 meta information would be wrong for a fraction of a second, making
 239 OpenOffice.org fail to create its deep directory tree because it was
 240 not allowed to create files in its freshly created directory.</p>
 241
 242 <p>Anyway, here is a nice tool for your tool box, might you never need
 243 it. :)</p>
 244
 245 <p>Update 2010-08-27: Michael Gebetsroither report that he found the
 246 script so useful that he created a GIT repository and stored it in
 247 <a href="http://github.com/gebi/fs-test">http://github.com/gebi/fs-test</a>.</p>
 248 </div>
 249
 250       <div class="tags">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/nuug">nuug</a>.</div>
 251
 252
 253     </div>
 254
 255
 256
 257
 258     <div id="sidebar">
 259
 260
 261
 262 <h2>Archive</h2>
 263 <ul>
 264
 265 <li>2017
 266 <ul>
 267
 268 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/01/">January (4)</a></li>
 269
 270 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/02/">February (3)</a></li>
 271
 272 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/03/">March (5)</a></li>
 273
 274 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/04/">April (2)</a></li>
 275
 276 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/06/">June (5)</a></li>
 277
 278 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/07/">July (1)</a></li>
 279
 280 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/08/">August (1)</a></li>
 281
 282 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/09/">September (3)</a></li>
 283
 284 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/10/">October (5)</a></li>
 285
 286 <li><a href="http://people.skolelinux.org/pere/blog/archive/2017/11/">November (2)</a></li>
 287
 288 </ul></li>
 289
 290 <li>2016
 291 <ul>
 292
 293 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/01/">January (3)</a></li>
 294
 295 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/02/">February (2)</a></li>
 296
 297 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/03/">March (3)</a></li>
 298
 299 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/04/">April (8)</a></li>
 300
 301 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/05/">May (8)</a></li>
 302
 303 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/06/">June (2)</a></li>
 304
 305 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/07/">July (2)</a></li>
 306
 307 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/08/">August (5)</a></li>
 308
 309 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/09/">September (2)</a></li>
 310
 311 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/10/">October (3)</a></li>
 312
 313 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/11/">November (8)</a></li>
 314
 315 <li><a href="http://people.skolelinux.org/pere/blog/archive/2016/12/">December (5)</a></li>
 316
 317 </ul></li>
 318
 319 <li>2015
 320 <ul>
 321
 322 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/01/">January (7)</a></li>
 323
 324 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/02/">February (6)</a></li>
 325
 326 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/03/">March (1)</a></li>
 327
 328 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/04/">April (4)</a></li>
 329
 330 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/05/">May (3)</a></li>
 331
 332 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/06/">June (4)</a></li>
 333
 334 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/07/">July (6)</a></li>
 335
 336 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/08/">August (2)</a></li>
 337
 338 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/09/">September (2)</a></li>
 339
 340 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/10/">October (9)</a></li>
 341
 342 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/11/">November (6)</a></li>
 343
 344 <li><a href="http://people.skolelinux.org/pere/blog/archive/2015/12/">December (3)</a></li>
 345
 346 </ul></li>
 347
 348 <li>2014
 349 <ul>
 350
 351 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/01/">January (2)</a></li>
 352
 353 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/02/">February (3)</a></li>
 354
 355 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/03/">March (8)</a></li>
 356
 357 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/04/">April (7)</a></li>
 358
 359 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/05/">May (1)</a></li>
 360
 361 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/06/">June (2)</a></li>
 362
 363 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/07/">July (2)</a></li>
 364
 365 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/08/">August (2)</a></li>
 366
 367 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/09/">September (5)</a></li>
 368
 369 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/10/">October (6)</a></li>
 370
 371 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/11/">November (3)</a></li>
 372
 373 <li><a href="http://people.skolelinux.org/pere/blog/archive/2014/12/">December (5)</a></li>
 374
 375 </ul></li>
 376
 377 <li>2013
 378 <ul>
 379
 380 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 381
 382 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
 383
 384 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
 385
 386 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
 387
 388 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
 389
 390 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
 391
 392 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
 393
 394 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 395
 396 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 397
 398 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (7)</a></li>
 399
 400 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/11/">November (9)</a></li>
 401
 402 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/12/">December (3)</a></li>
 403
 404 </ul></li>
 405
 406 <li>2012
 407 <ul>
 408
 409 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 410
 411 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 412
 413 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 414
 415 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 416
 417 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 418
 419 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 420
 421 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 422
 423 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 424
 425 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 426
 427 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 428
 429 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 430
 431 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 432
 433 </ul></li>
 434
 435 <li>2011
 436 <ul>
 437
 438 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 439
 440 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 441
 442 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 443
 444 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 445
 446 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 447
 448 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 449
 450 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 451
 452 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 453
 454 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 455
 456 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 457
 458 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 459
 460 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 461
 462 </ul></li>
 463
 464 <li>2010
 465 <ul>
 466
 467 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 468
 469 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 470
 471 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 472
 473 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 474
 475 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 476
 477 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 478
 479 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 480
 481 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 482
 483 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 484
 485 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 486
 487 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 488
 489 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 490
 491 </ul></li>
 492
 493 <li>2009
 494 <ul>
 495
 496 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 497
 498 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 499
 500 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 501
 502 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 503
 504 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 505
 506 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 507
 508 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 509
 510 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 511
 512 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 513
 514 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 515
 516 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 517
 518 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 519
 520 </ul></li>
 521
 522 <li>2008
 523 <ul>
 524
 525 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 526
 527 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 528
 529 </ul></li>
 530
 531 </ul>
 532
 533
 534
 535 <h2>Tags</h2>
 536 <ul>
 537
 538  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (14)</a></li>
 539
 540  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 541
 542  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 543
 544  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 545
 546  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (9)</a></li>
 547
 548  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (16)</a></li>
 549
 550  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 551
 552  <li><a href="http://people.skolelinux.org/pere/blog/tags/chrpath">chrpath (2)</a></li>
 553
 554  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (154)</a></li>
 555
 556  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (158)</a></li>
 557
 558  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian-handbook">debian-handbook (4)</a></li>
 559
 560  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
 561
 562  <li><a href="http://people.skolelinux.org/pere/blog/tags/dld">dld (17)</a></li>
 563
 564  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (24)</a></li>
 565
 566  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 567
 568  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (359)</a></li>
 569
 570  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (23)</a></li>
 571
 572  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
 573
 574  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (30)</a></li>
 575
 576  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (9)</a></li>
 577
 578  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (18)</a></li>
 579
 580  <li><a href="http://people.skolelinux.org/pere/blog/tags/h264">h264 (20)</a></li>
 581
 582  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (42)</a></li>
 583
 584  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (15)</a></li>
 585
 586  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (20)</a></li>
 587
 588  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (9)</a></li>
 589
 590  <li><a href="http://people.skolelinux.org/pere/blog/tags/lego">lego (4)</a></li>
 591
 592  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (8)</a></li>
 593
 594  <li><a href="http://people.skolelinux.org/pere/blog/tags/lsdvd">lsdvd (2)</a></li>
 595
 596  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 597
 598  <li><a href="http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network (8)</a></li>
 599
 600  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (39)</a></li>
 601
 602  <li><a href="http://people.skolelinux.org/pere/blog/tags/nice free software">nice free software (9)</a></li>
 603
 604  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (293)</a></li>
 605
 606  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (189)</a></li>
 607
 608  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (33)</a></li>
 609
 610  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 611
 612  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (66)</a></li>
 613
 614  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (104)</a></li>
 615
 616  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (2)</a></li>
 617
 618  <li><a href="http://people.skolelinux.org/pere/blog/tags/reactos">reactos (1)</a></li>
 619
 620  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 621
 622  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (3)</a></li>
 623
 624  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (10)</a></li>
 625
 626  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 627
 628  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (5)</a></li>
 629
 630  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 631
 632  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (53)</a></li>
 633
 634  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 635
 636  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (5)</a></li>
 637
 638  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (55)</a></li>
 639
 640  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (6)</a></li>
 641
 642  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (12)</a></li>
 643
 644  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (52)</a></li>
 645
 646  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (4)</a></li>
 647
 648  <li><a href="http://people.skolelinux.org/pere/blog/tags/usenix">usenix (2)</a></li>
 649
 650  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (9)</a></li>
 651
 652  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (59)</a></li>
 653
 654  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 655
 656  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (40)</a></li>
 657
 658 </ul>
 659
 660
 661     </div>
 662     <p style="text-align: right">
 663  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 664 </p>
 665
 666   </body>
 667 </html>