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   6     <title>Petter Reinholdtsen: entries from February 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 February 2012.</h3>
  23
  24     <div class="entry">
  25       <div class="title">
  26         <a href="http://people.skolelinux.org/pere/blog/Third_beta_version_of_Debian_Edu___Skolelinux_based_on_Squeeze.html">Third beta version of Debian Edu / Skolelinux based on Squeeze</a>
  27       </div>
  28       <div class="date">
  29          4th February 2012
  30       </div>
  31       <div class="body">
  32         <p>I am happy to announce that finally we managed today to wrap up and
  33 publish the third beta version of
  34 <a href="http://www.skolelinux.org/">Debian Edu / Skolelinux</a> based
  35 on Squeeze.  If you want to test a LDAP backed Kerberos server with
  36 out of the box PXE configuration for running diskless machines and
  37 installing new machines, check it out.  If you need a software
  38 solution for your school, check it out too.  The full announcement is
  39 <a href="http://lists.debian.org/debian-edu-announce/2012/02/msg00000.html">available</a>
  40 on the project announcement list.</p>
  41
  42 <p>I am very happy to report these changes and improvements since
  43 beta2 (there are more, see announcement for full list):</p>
  44
  45 <ul>
  46
  47 <li>It is now possible to change the pre-configured IP subnet from
  48   10.0.0.0/8 to something else by using the subnet-change tool after
  49   the installation.</li>
  50
  51 <li>Too full partitions are now automatically extended on the Main
  52   Server, based on the rules specified in /etc/fsautoresizetab.</li>
  53
  54 <li>The CUPS queues are now automatically flushed every night, and all
  55   disabled queues are restarted every hour.  This should cut down on
  56   the amount of manual administration needed for printers.</li>
  57
  58 <li>The set of initial users have been changed.  Now a personal user
  59   for the local system administrator is created during installation
  60   instead of the previously created localadmin and super-admin users,
  61   and this user is granted administrative privileges using group
  62   membership.  This reduces the number of passwords one need to keep
  63   up to date on the system.</li>
  64
  65 </ul>
  66
  67 <p>The new main server seem to work so well that I am testing it as my
  68 private DNS/LDAP/Kerberos/PXE/LTSP server at home.  I will use it look
  69 for issues we could fix to polish Debian Edu even further before the
  70 final Squeeze release is published.</p>
  71
  72 <p>Next weekend the project organise a
  73 <a href="http://lists.debian.org/debian-edu-announce/2012/01/msg00001.html">developer
  74 gathering</a> in Oslo.  We will continue the work on the Squeeze
  75 version, and start initial planning for the Wheezy version.  Perhaps I
  76 will see you there?</p>
  77
  78       </div>
  79       <div class="tags">
  80
  81
  82         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>.
  83
  84
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  87     <div class="padding"></div>
  88
  89     <div class="entry">
  90       <div class="title">
  91         <a href="http://people.skolelinux.org/pere/blog/Saving_power_with_Debian_Edu___Skolelinux_using_shutdown_at_night.html">Saving power with Debian Edu / Skolelinux using shutdown-at-night</a>
  92       </div>
  93       <div class="date">
  94          5th February 2012
  95       </div>
  96       <div class="body">
  97         <p>Since the Lenny version of
  98 <a href="http://www.skolelinux.org/">Debian Edu / Skolelinux</a>, a
  99 feature to save power have been included.  It is as simple as it is
 100 practical: Shut down unused clients at night, and turn them on again
 101 in the morning.  This is done using the
 102 <a href="http://packages.qa.debian.org/s/shutdown-at-night.html">shutdown-at-night</a> Debian package.</p>
 103
 104 <p>To enable this feature on a client, the machine need to be added to
 105 the netgroup shutdown-at-night-hosts.  For Debian Edu, this is done in
 106 LDAP, and once this is in place, the machine in question will check
 107 every hour from 16:00 until 06:00 to see if the machine is unused, and
 108 shut it down if it is.  If the hardware in question is supported by
 109 the
 110 <a href="http://packages.qa.debian.org/n/nvram-wakeup.html">nvram-wakeup</a>
 111 package, the BIOS is told to turn the machine back on around 07:00 +-
 112 10 minutes.  If this isn't working, one can configure wake-on-lan to
 113 try to turn on the client.  The wake-on-lan option is only documented
 114 and not enabled by default in Debian Edu.</p>
 115
 116 <p>It is important to not turn all machines on at once, as this can
 117 blow a fuse if several computers are connected to the same fuse like
 118 the common setup for a classroom.  The nvram-wakeup method only work
 119 for machines with a functioning hardware/BIOS clock.  I've seen old
 120 machines where the BIOS battery were dead and the hardware clock were
 121 starting from 0 (or was it 1990?) every boot.  If you have one of
 122 those, you have to turn on the computer manually.</p>
 123
 124 <p>The shutdown-at-night package is completely self contained, and can
 125 also be used outside the Debian Edu environment.  For those without a
 126 central LDAP server with netgroups, one can instead touch the file
 127 <tt>/etc/shutdown-at-night/shutdown-at-night</tt> to enable it.
 128 Perhaps you too can use it to save some power?</p>
 129
 130       </div>
 131       <div class="tags">
 132
 133
 134         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>.
 135
 136
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 138     </div>
 139     <div class="padding"></div>
 140
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 142     <div id="sidebar">
 143
 144
 145
 146 <h2>Archive</h2>
 147 <ul>
 148
 149 <li>2012
 150 <ul>
 151
 152 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 153
 154 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (2)</a></li>
 155
 156 </ul></li>
 157
 158 <li>2011
 159 <ul>
 160
 161 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 162
 163 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 164
 165 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 166
 167 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 168
 169 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 170
 171 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 172
 173 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 174
 175 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 176
 177 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 178
 179 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 180
 181 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 182
 183 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 184
 185 </ul></li>
 186
 187 <li>2010
 188 <ul>
 189
 190 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 191
 192 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 193
 194 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 195
 196 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 197
 198 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 199
 200 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 201
 202 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 203
 204 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 205
 206 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 207
 208 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 209
 210 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 211
 212 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 213
 214 </ul></li>
 215
 216 <li>2009
 217 <ul>
 218
 219 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 220
 221 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 222
 223 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 224
 225 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 226
 227 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 228
 229 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 230
 231 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 232
 233 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 234
 235 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 236
 237 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 238
 239 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 240
 241 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 242
 243 </ul></li>
 244
 245 <li>2008
 246 <ul>
 247
 248 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 249
 250 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 251
 252 </ul></li>
 253
 254 </ul>
 255
 256
 257
 258 <h2>Tags</h2>
 259 <ul>
 260
 261  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (13)</a></li>
 262
 263  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 264
 265  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 266
 267  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (2)</a></li>
 268
 269  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (12)</a></li>
 270
 271  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 272
 273  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (54)</a></li>
 274
 275  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (73)</a></li>
 276
 277  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (7)</a></li>
 278
 279  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (105)</a></li>
 280
 281  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (13)</a></li>
 282
 283  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
 284
 285  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (12)</a></li>
 286
 287  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (15)</a></li>
 288
 289  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (8)</a></li>
 290
 291  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (4)</a></li>
 292
 293  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 294
 295  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (14)</a></li>
 296
 297  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (143)</a></li>
 298
 299  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (119)</a></li>
 300
 301  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 302
 303  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (24)</a></li>
 304
 305  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (46)</a></li>
 306
 307  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 308
 309  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (2)</a></li>
 310
 311  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (4)</a></li>
 312
 313  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 314
 315  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (23)</a></li>
 316
 317  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 318
 319  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (24)</a></li>
 320
 321  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (1)</a></li>
 322
 323  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (3)</a></li>
 324
 325  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (9)</a></li>
 326
 327  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (6)</a></li>
 328
 329  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (22)</a></li>
 330
 331  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (1)</a></li>
 332
 333  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (18)</a></li>
 334
 335 </ul>
 336
 337
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