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   6     <title>Petter Reinholdtsen: entries from December 2012</title>
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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 December 2012.</h3>
  23
  24     <div class="entry">
  25       <div class="title">
  26         <a href="http://people.skolelinux.org/pere/blog/Ledger___double_entry_accounting_using_text_based_storage_format.html">Ledger - double-entry accounting using text based storage format</a>
  27       </div>
  28       <div class="date">
  29         18th December 2012
  30       </div>
  31       <div class="body">
  32         <p>A few days ago I came across
  33 <a href="http://joeyh.name/blog/entry/hledger/">a blog post from Joey
  34 Hess</a> describing <a href="http://ledger-cli.org/">ledger</a> and
  35 hledger, a text based system for double-entry accounting.  I found it
  36 interesting, as I am involved with several organizations where
  37 accounting is an issue, and I have not really become too friendly with
  38 the different web based systems we use.  I find it hard to find what I
  39 look for in the menus and even harder try to get sensible data out of
  40 the systems.  Ledger seem different.  The accounting data is kept in
  41 text files that can be stored in a version control system, and there
  42
  43 are at least <a href="https://github.com/ledger/ledger/wiki/Ports">five
  44 different implementations</a> able to read the format.  An example
  45 entry look like this, and is simple enough that it will be trivial to
  46 generate entries based on CVS files fetched from the bank:</p>
  47
  48 <blockquote><pre>
  49 2004-05-27 Book Store
  50       Expenses:Books                 $20.00
  51       Liabilities:Visa
  52 </pre></blockquote>
  53
  54 <p>The concept seemed interesting enough for me to check it out and
  55 look for others using it.  I found blog posts from
  56 <a href="http://blog.spang.cc/posts/hledger_rocks_my_world/">Christine
  57 Spang</a>,
  58 <a href="http://bugsplat.info/2010-05-23-keeping-finances-with-ledger.html">Pete
  59 Keen</a>,
  60 <a href="http://blog.andrewcantino.com/blog/2010/11/06/command-line-accounting-with-ledger-and-reckon/">Andrew
  61 Cantino</a> and
  62 <a href="http://blog.iphoting.com/blog/2012/11/29/command-line-double-entry-accounting/">Ronald
  63 Ip</a> describing how they use it, as well as a post from
  64 <a href="https://groups.google.com/forum/?fromgroups=#!topic/ledger-cli/r0oWjwbQ9Bo">Bradley
  65 M. Kuhn</a> at the Software Freedom Conservancy.  All seemed like good
  66 recommendations fitting my need.</p>
  67
  68 <p>The <a href="http://packages.qa.debian.org/l/ledger.html">ledger</a>
  69 package is available in Debian Squeeze, while the
  70 <a href="http://packages.qa.debian.org/h/haskell-hledger.html">hledger</a>
  71 package only is available in Debian Sid.  As I use Squeeze, ledger
  72 seemed the best choice to get started.</p>
  73
  74 <p>To get some real data to test on, I wrote a
  75 <a href="http://www.nuug.no/tools/lodo2ledger">web scraper</a> for
  76 <a href="http://www.lodo.no/">LODO</a>, the accounting system used by
  77 the <a href="http://www.nuug.no/">NUUG</a> association, and started to
  78 play with the data set.  I'm not really deeply into accounting, but I
  79 am able to get a simple balance and accounting status for example
  80 using the "<tt>ledger balance</tt>" command.  But I will have to
  81 gather more experience before I know if the ledger way is a good fit
  82 for the organisations I am involved in.</p>
  83
  84       </div>
  85       <div class="tags">
  86
  87
  88         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>.
  89
  90
  91       </div>
  92     </div>
  93     <div class="padding"></div>
  94
  95     <div class="entry">
  96       <div class="title">
  97         <a href="http://people.skolelinux.org/pere/blog/61_kommuner_lenker_n__til_FiksGataMi_fra_sine_nettsider.html">61 kommuner lenker nå til FiksGataMi fra sine nettsider</a>
  98       </div>
  99       <div class="date">
 100         11th December 2012
 101       </div>
 102       <div class="body">
 103         <p>For noen dager siden omfavnet nok en kommune NUUGs
 104 <a href="http://www.fiksgatami.no/">FiksGataMi</a>.  Med 61 kommuner
 105 som lenker til FiksGataMi fra sine hjemmesider er «markedsandelen» 14%
 106 (av 429 kommuner).  Siden
 107 <a href="http://people.skolelinux.org/pere/blog/59_kommuner_omfavner_n__FiksGataMi.html">siste
 108 oppdatering i november</a> har kommunene Re og Vågsøy kommet til og
 109 slår følge med kommunene Askim, Askøy, Audnedal, Aure, Balestrand,
 110 Bærum, Eide, Farsund, Flekkefjord, Folldal, Gran, Grue, Hadsel,
 111 Halden, Halsa, Hamar, Hobøl, Holtålen, Hægebostad, Høyanger,
 112 Kongsberg, Kristiansund, Kvinesdal, Kviteseid, Levanger, Lindesnes,
 113 Luster, Lyngdal, Løten, Mandal, Marnardal, Moss, Namsos, Nissedal,
 114 Nordreisa, Randaberg, Rindal, Sel, Sirdal, Skiptvet, Sortland,
 115 Spydeberg, Stange, Stjørdal, Stord, Søgne, Sør-Odal, Tolga, Trysil,
 116 Tynset, Tysvær, Ullensvang Herad, Utsira, Vennesla, Verdal, Vågan,
 117 Vågå, Våler og Åseral.  Oppdatert liste er tilgjengelig fra
 118 <a href="http://wiki.nuug.no/grupper/fiksgatami/positivemottakere">NUUGs
 119 wiki</a>.  Kartet er dog ikke oppdatert med de siste kommunene.</p>
 120
 121 <p>Kanskje du bør høre med din kommune om de vil bli mer aktive
 122 brukere av FiksGataMi?  Se
 123 <a href="http://people.skolelinux.org/pere/blog/40_kommuner_lenker_n__til_FiksGataMi_fra_sine_nettsider___gj_r_din_.html">en
 124 tidligere bloggpost</a> med tips om hvordan det kan gjøres.</p>
 125
 126 <p>I snitt rapporteres det nå via FiksGataMi ca. 60 meldinger fra
 127 innbyggerne i uka om feil på offentlig infrastruktur.</p>
 128
 129       </div>
 130       <div class="tags">
 131
 132
 133         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami</a>, <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>.
 134
 135
 136       </div>
 137     </div>
 138     <div class="padding"></div>
 139
 140     <div class="entry">
 141       <div class="title">
 142         <a href="http://people.skolelinux.org/pere/blog/Scripting_the_Cerebrum_bofhd_user_administration_system_using_XML_RPC.html">Scripting the Cerebrum/bofhd user administration system using XML-RPC</a>
 143       </div>
 144       <div class="date">
 145          6th December 2012
 146       </div>
 147       <div class="body">
 148         <p>Where I work at the <a href="http://www.uio.no/">University of
 149 Oslo</a>, we use the
 150 <a href="http://sourceforge.net/projects/cerebrum/">Cerebrum user
 151 administration system</a> to maintain users, groups, DNS, DHCP, etc.
 152 I've known since the system was written that the server is providing
 153 an <a href="http://en.wikipedia.org/wiki/XML-RPC">XML-RPC</a> API, but
 154 I have never spent time to try to figure out how to use it, as we
 155 always use the bofh command line client at work.  Until today.  I want
 156 to script the updating of DNS and DHCP to make it easier to set up
 157 virtual machines.  Here are a few notes on how to use it with
 158 Python.</p>
 159
 160 <p>I started by looking at the source of the Java
 161 <a href="http://cerebrum.svn.sourceforge.net/viewvc/cerebrum/trunk/cerebrum/clients/jbofh/">bofh
 162 client</a>, to figure out how it connected to the API server.  I also
 163 googled for python examples on how to use XML-RPC, and found
 164 <a href="http://tldp.org/HOWTO/XML-RPC-HOWTO/xmlrpc-howto-python.html">a
 165 simple example in</a> the XML-RPC howto.</p>
 166
 167 <p>This simple example code show how to connect, get the list of
 168 commands (as a JSON dump), and how to get the information about the
 169 user currently logged in:</p>
 170
 171 <blockquote><pre>
 172 #!/usr/bin/env python
 173 import getpass
 174 import xmlrpclib
 175 server_url = 'https://cerebrum-uio.uio.no:8000';
 176 username = getpass.getuser()
 177 password = getpass.getpass()
 178 server = xmlrpclib.Server(server_url);
 179 #print server.get_commands(sessionid)
 180 sessionid = server.login(username, password)
 181 print server.run_command(sessionid, "user_info", username)
 182 result = server.logout(sessionid)
 183 print result
 184 </pre></blockquote>
 185
 186 <p>Armed with this knowledge I can now move forward and script the DNS
 187 and DHCP updates I wanted to do.</p>
 188
 189       </div>
 190       <div class="tags">
 191
 192
 193         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin</a>.
 194
 195
 196       </div>
 197     </div>
 198     <div class="padding"></div>
 199
 200     <p style="text-align: right;"><a href="12.rss"><img src="http://people.skolelinux.org/pere/blog/xml.gif" alt="RSS Feed" width="36" height="14" /></a></p>
 201     <div id="sidebar">
 202
 203
 204
 205 <h2>Archive</h2>
 206 <ul>
 207
 208 <li>2012
 209 <ul>
 210
 211 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 212
 213 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 214
 215 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 216
 217 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 218
 219 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 220
 221 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 222
 223 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 224
 225 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 226
 227 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 228
 229 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 230
 231 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 232
 233 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (3)</a></li>
 234
 235 </ul></li>
 236
 237 <li>2011
 238 <ul>
 239
 240 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 241
 242 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 243
 244 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 245
 246 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 247
 248 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 249
 250 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 251
 252 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 253
 254 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 255
 256 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 257
 258 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 259
 260 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 261
 262 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 263
 264 </ul></li>
 265
 266 <li>2010
 267 <ul>
 268
 269 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 270
 271 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 272
 273 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 274
 275 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 276
 277 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 278
 279 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 280
 281 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 282
 283 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 284
 285 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 286
 287 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 288
 289 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 290
 291 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 292
 293 </ul></li>
 294
 295 <li>2009
 296 <ul>
 297
 298 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 299
 300 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 301
 302 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 303
 304 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 305
 306 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 307
 308 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 309
 310 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 311
 312 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 313
 314 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 315
 316 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 317
 318 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 319
 320 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 321
 322 </ul></li>
 323
 324 <li>2008
 325 <ul>
 326
 327 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 328
 329 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 330
 331 </ul></li>
 332
 333 </ul>
 334
 335
 336
 337 <h2>Tags</h2>
 338 <ul>
 339
 340  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (13)</a></li>
 341
 342  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 343
 344  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 345
 346  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (3)</a></li>
 347
 348  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (3)</a></li>
 349
 350  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (12)</a></li>
 351
 352  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 353
 354  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (57)</a></li>
 355
 356  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (117)</a></li>
 357
 358  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (9)</a></li>
 359
 360  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (7)</a></li>
 361
 362  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 363
 364  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (162)</a></li>
 365
 366  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (21)</a></li>
 367
 368  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
 369
 370  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (9)</a></li>
 371
 372  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (9)</a></li>
 373
 374  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (32)</a></li>
 375
 376  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (17)</a></li>
 377
 378  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (8)</a></li>
 379
 380  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (5)</a></li>
 381
 382  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 383
 384  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (25)</a></li>
 385
 386  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (217)</a></li>
 387
 388  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (148)</a></li>
 389
 390  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (6)</a></li>
 391
 392  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 393
 394  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (39)</a></li>
 395
 396  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (60)</a></li>
 397
 398  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (1)</a></li>
 399
 400  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 401
 402  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (2)</a></li>
 403
 404  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (4)</a></li>
 405
 406  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 407
 408  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (4)</a></li>
 409
 410  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 411
 412  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (28)</a></li>
 413
 414  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 415
 416  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (4)</a></li>
 417
 418  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (39)</a></li>
 419
 420  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (3)</a></li>
 421
 422  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (5)</a></li>
 423
 424  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (12)</a></li>
 425
 426  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (1)</a></li>
 427
 428  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (7)</a></li>
 429
 430  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (35)</a></li>
 431
 432  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 433
 434  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (26)</a></li>
 435
 436 </ul>
 437
 438
 439     </div>
 440     <p style="text-align: right">
 441  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.4</a>
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