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	<title>NerdyRoom™ &#187; jupp</title>
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		<title>Zum Sonntag</title>
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		<pubDate>Sat, 04 Feb 2012 23:25:21 +0000</pubDate>
		<dc:creator>jupp</dc:creator>
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			<content:encoded><![CDATA[<p><img src="http://julius-hensel.com/wp-content/uploads/2011/12/wulff.jpg" /></p>
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		<title>Programming Language Popularity</title>
		<link>http://www.nrtm.de/index.php/2011/11/30/programming-language-popularity/</link>
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		<pubDate>Wed, 30 Nov 2011 19:10:35 +0000</pubDate>
		<dc:creator>jupp</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[programming languages]]></category>
		<category><![CDATA[rant]]></category>

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		<description><![CDATA[Another contribution to our programming language discussion: Language popularity for November 2011: PositionNov 2011 PositionNov 2010 Delta in Position Programming Language RatingsNov 2011 Delta Nov 2010 Status 1 1 Java 17.874% -0.63% &#160;&#160;A 2 2 C 17.322% +0.61% &#160;&#160;A 3 3 C++ 8.084% -1.41% &#160;&#160;A 4 5 C# 7.319% +1.61% &#160;&#160;A 5 4 PHP 6.096% [...]]]></description>
			<content:encoded><![CDATA[<p>Another contribution to our programming language discussion:</p>
<p>Language popularity for November 2011:</p>
<table class="TpciTable" align="center" border="1" id="Table2">
<col align="center">
</col>
<col align="center">
</col>
<col align="center">
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<col>
</col>
<col align="center">
</col>
<col align="center">
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<col align="center">
<tbody>
<tr>
<th nowrap="" align="center">Position<br />Nov 2011</th>
<th nowrap="" align="center">Position<br />Nov 2010</th>
<th nowrap="" align="center">Delta in Position</th>
<th nowrap="" align="center">Programming Language</th>
<th nowrap="" align="center">Ratings<br />Nov 2011</th>
<th nowrap="" align="center">Delta <br />Nov 2010</th>
<th nowrap="" align="center">Status</th>
</tr>
<tr>
<td align="center">1</td>
<td align="center">1</td>
<td align="center"><img border="0" src="http://www.tiobe.com/tiobe_index/images/Same.gif" /></td>
<td><a href="/content/paperinfo/tpci/Java.html">Java</a></td>
<td align="center">17.874%</td>
<td align="center">-0.63%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">2</td>
<td align="center">2</td>
<td align="center"><img border="0" src="http://www.tiobe.com/tiobe_index/images/Same.gif" /></td>
<td><a href="/content/paperinfo/tpci/C.html">C</a></td>
<td align="center">17.322%</td>
<td align="center">+0.61%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">3</td>
<td align="center">3</td>
<td align="center"><img border="0" src="http://www.tiobe.com/tiobe_index/images/Same.gif" /></td>
<td><a href="/content/paperinfo/tpci/C__.html">C++</a></td>
<td align="center">8.084%</td>
<td align="center">-1.41%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">4</td>
<td align="center">5</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" />	</td>
<td><a href="/content/paperinfo/tpci/C_.html">C#</a></td>
<td align="center">7.319%</td>
<td align="center">+1.61%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">5</td>
<td align="center">4</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Down.gif" />	</td>
<td><a href="/content/paperinfo/tpci/PHP.html">PHP</a></td>
<td align="center">6.096%</td>
<td align="center">-1.72%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">6</td>
<td align="center">8</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" />	</td>
<td><a href="/content/paperinfo/tpci/Objective-C.html">Objective-C</a></td>
<td align="center">5.983%</td>
<td align="center">+2.79%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">7</td>
<td align="center">7</td>
<td align="center"><img border="0" src="http://www.tiobe.com/tiobe_index/images/Same.gif" /></td>
<td><a href="/content/paperinfo/tpci/(Visual)_Basic.html">(Visual) Basic</a></td>
<td align="center">5.041%</td>
<td align="center">-0.43%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">8</td>
<td align="center">6</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Down.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Down.gif" />	</td>
<td><a href="/content/paperinfo/tpci/Python.html">Python</a></td>
<td align="center">3.617%</td>
<td align="center">-2.06%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">9</td>
<td align="center">11</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" />	</td>
<td><a href="/content/paperinfo/tpci/JavaScript.html">JavaScript</a></td>
<td align="center">2.565%</td>
<td align="center">+0.90%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">10</td>
<td align="center">9</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Down.gif" />	</td>
<td><a href="/content/paperinfo/tpci/Perl.html">Perl</a></td>
<td align="center">2.078%</td>
<td align="center">-0.39%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">11</td>
<td align="center">10</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Down.gif" />	</td>
<td><a href="/content/paperinfo/tpci/Ruby.html">Ruby</a></td>
<td align="center">1.502%</td>
<td align="center">-0.40%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">12</td>
<td align="center">20</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" />	</td>
<td><a href="/content/paperinfo/tpci/PL_SQL.html">PL/SQL</a></td>
<td align="center">1.438%</td>
<td align="center">+0.78%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">13</td>
<td align="center">13</td>
<td align="center"><img border="0" src="http://www.tiobe.com/tiobe_index/images/Same.gif" /></td>
<td><a href="/content/paperinfo/tpci/Lisp.html">Lisp</a></td>
<td align="center">1.182%</td>
<td align="center">+0.09%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">14</td>
<td align="center">15</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" />	</td>
<td><a href="/content/paperinfo/tpci/Pascal.html">Pascal</a></td>
<td align="center">0.991%</td>
<td align="center">+0.21%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">15</td>
<td align="center">21</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" />	</td>
<td><a href="/content/paperinfo/tpci/MATLAB.html">MATLAB</a></td>
<td align="center">0.955%</td>
<td align="center">+0.32%</td>
<td align="left">&nbsp;&nbsp;A&#8211;</td>
</tr>
<tr>
<td align="center">16</td>
<td align="center">12</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Down.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Down.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Down.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Down.gif" />	</td>
<td><a href="/content/paperinfo/tpci/Delphi_Object_Pascal.html">Delphi/Object Pascal</a></td>
<td align="center">0.872%</td>
<td align="center">-0.77%</td>
<td align="left">&nbsp;&nbsp;A</td>
</tr>
<tr>
<td align="center">17</td>
<td align="center">23</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" />	</td>
<td><a href="/content/paperinfo/tpci/ABAP.html">ABAP</a></td>
<td align="center">0.847%</td>
<td align="center">+0.25%</td>
<td align="left">&nbsp;&nbsp;A&#8211;</td>
</tr>
<tr>
<td align="center">18</td>
<td align="center">22</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Up.gif" />	</td>
<td><a href="/content/paperinfo/tpci/Lua.html">Lua</a></td>
<td align="center">0.635%</td>
<td align="center">+0.02%</td>
<td align="left">&nbsp;&nbsp;A-</td>
</tr>
<tr>
<td align="center">19</td>
<td align="center">16</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Down.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Down.gif" /><img border="0" src="http://www.tiobe.com/tiobe_index/images/Down.gif" />	</td>
<td><a href="/content/paperinfo/tpci/Ada.html">Ada</a></td>
<td align="center">0.622%</td>
<td align="center">-0.07%</td>
<td align="left">&nbsp;&nbsp;B</td>
</tr>
<tr>
<td align="center">20</td>
<td align="center">19</td>
<td align="center">
<img border="0" src="http://www.tiobe.com/tiobe_index/images/Down.gif" />	</td>
<td><a href="/content/paperinfo/tpci/RPG_(OS_400).html">RPG (OS/400)</a></td>
<td align="center">0.620%</td>
<td align="center">-0.04%</td>
<td align="left">&nbsp;&nbsp;B</td>
</tr>
</tbody>
</col>
</table>
<p><a href="http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html">Source</a></p>
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		<title>TRIM Speedup on OS X Lion using Full Disk Encryption</title>
		<link>http://www.nrtm.de/index.php/2011/11/20/3740/</link>
		<comments>http://www.nrtm.de/index.php/2011/11/20/3740/#comments</comments>
		<pubDate>Sun, 20 Nov 2011 14:31:34 +0000</pubDate>
		<dc:creator>jupp</dc:creator>
				<category><![CDATA[hardware]]></category>
		<category><![CDATA[software]]></category>
		<category><![CDATA[technic]]></category>
		<category><![CDATA[benchmark]]></category>
		<category><![CDATA[io]]></category>
		<category><![CDATA[performance]]></category>
		<category><![CDATA[ssd]]></category>
		<category><![CDATA[trim]]></category>

		<guid isPermaLink="false">http://www.nrtm.de/?p=3740</guid>
		<description><![CDATA[I was quite surprised to see the speed up achieved by enabling TRIM support on Lion using TRIM Enabler. After I enabled it, I created a big file, deleted it (thus freeing/trimming the no longer used blocks) and rewriting another file of the same size: jupp@x / &#62; dd if=/dev/zero of=zero bs=1m count=$((6*1024)) 6144+0 records [...]]]></description>
			<content:encoded><![CDATA[<p>I was quite surprised to see the speed up achieved by enabling TRIM support on Lion using <a href="http://www.groths.org/?p=522">TRIM Enabler</a>. After I enabled it, I created a big file, deleted it (thus freeing/trimming the no longer used blocks) and rewriting another file of the same size:</p>
<pre>
jupp@x / &gt; dd if=/dev/zero of=zero bs=1m count=$((6*1024))
6144+0 records in
6144+0 records out
6442450944 bytes transferred in 71.336086 secs (90311248 bytes/sec)
jupp@x / &gt; rm zero                                                                                                                                                                                                                                                                                                                      jupp@x / &gt; dd if=/dev/zero of=zero bs=1m count=$((6*1024))
6144+0 records in
6144+0 records out
6442450944 bytes transferred in 55.568795 secs (120149352 bytes/sec)
</pre>
<p>That&#8217;s a 1.33 speedup for sequential writing. This should not effect reading, of course. As you can imagine, the benefits for random IO on small blocks will be much higher than that.</p>
<p>This shows that the on-chip garbage collector in the SSD drive is (as expected) unable to do anything if full disk encryption is used, requiring the use of TRIM in order to keep write performance high. However, be warned: the use of TRIM could potentially compromise the invisibility of your main partition if using a fake partition for plausible deniability.</p>
<p>I&#8217;m using a <a href="http://www.everymac.com/ultimate-mac-lookup/?search_keywords=MacBookPro6,2">MacbookPro6,2</a> and an <a href="http://www.rwlabs.com/article.php?cat=articles&amp;id=541&amp;pagenumber=2">Intel SSDSA2CW120G3</a>.</p>
<p>Disclaimer: I&#8217;m aware that using dd in this fashion in order to achieve quantitive benchmarking results is not recommended. It was just a quick hack to demonstrate that it&#8217;s freakin faster with TRIM.</p>
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		<title>Password Strength</title>
		<link>http://www.nrtm.de/index.php/2011/11/10/password-strength/</link>
		<comments>http://www.nrtm.de/index.php/2011/11/10/password-strength/#comments</comments>
		<pubDate>Thu, 10 Nov 2011 15:09:10 +0000</pubDate>
		<dc:creator>jupp</dc:creator>
				<category><![CDATA[cultural]]></category>
		<category><![CDATA[management]]></category>
		<category><![CDATA[software]]></category>
		<category><![CDATA[1password]]></category>
		<category><![CDATA[password]]></category>
		<category><![CDATA[password strength]]></category>
		<category><![CDATA[security]]></category>

		<guid isPermaLink="false">http://www.nrtm.de/?p=3730</guid>
		<description><![CDATA[I personally use 1password to generate, manage and backup my passwords. This lead to a controversial discussion today, because some people felt uncomfortable with the idea to upload all your passwords (albeit encrypted) to the cloud. Some interesting articles: Good Bye Passwords (in German): http://blog.koehntopp.de/archives/3085-Sag-zum-Passwort-leise-Tschuess&#8230;.html Awesome article about password strenght and password management: http://www.troyhunt.com/2011/03/only-secure-password-is-one-you-cant.html Password [...]]]></description>
			<content:encoded><![CDATA[<p>I personally use <a href="https://agilebits.com/onepassword">1password</a> to generate, manage and backup my passwords. This lead to a controversial discussion today, because some people felt uncomfortable with the idea to upload all your passwords (albeit encrypted) to the cloud. Some interesting articles:</p>
<p>Good Bye Passwords (in German):<br />
<a href="http://blog.koehntopp.de/archives/3085-Sag-zum-Passwort-leise-Tschuess....html">http://blog.koehntopp.de/archives/3085-Sag-zum-Passwort-leise-Tschuess&#8230;.html</a></p>
<p>Awesome article about password strenght and password management:<br />
<a href="http://www.troyhunt.com/2011/03/only-secure-password-is-one-you-cant.html">http://www.troyhunt.com/2011/03/only-secure-password-is-one-you-cant.html</a></p>
<p>Password entropy calculator:<br />
<a href="http://rumkin.com/tools/password/passchk.php">http://rumkin.com/tools/password/passchk.php</a></p>
<p>Most of my passwords are 50 characters long and thus not easily guessable (&gt; 256bit entropy using the calculator above). How do you handle your passwords?</p>
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		<title>Beautiful Tables</title>
		<link>http://www.nrtm.de/index.php/2011/11/08/beautiful-tables/</link>
		<comments>http://www.nrtm.de/index.php/2011/11/08/beautiful-tables/#comments</comments>
		<pubDate>Tue, 08 Nov 2011 18:17:59 +0000</pubDate>
		<dc:creator>jupp</dc:creator>
				<category><![CDATA[cultural]]></category>
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		<category><![CDATA[beatiful]]></category>
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		<category><![CDATA[tables]]></category>

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		<description><![CDATA[After a long discussion today, I stumbled upon this guide, which describes how to do table layout in a professional manner. It&#8217;s just stunning how often people choose arbitrary table layouts without paying much attention on best practices. The picture included in this post explains most of it, also note the booktabs latex package for [...]]]></description>
			<content:encoded><![CDATA[<p>After a long discussion today, I stumbled upon <a href="http://t.co/sOOe86OL">this guide</a>, which describes how to do table layout in a professional manner. It&#8217;s just stunning how often people choose arbitrary table layouts without paying much attention on best practices. The picture included in this post explains most of it, also note the <a href="http://en.wikibooks.org/wiki/LaTeX/Tables#Professional_tables">booktabs latex package</a> for implementing this more easily.</p>
<p style="text-align: center"><a href="http://www.nrtm.de/index.php/2011/11/08/beautiful-tables/tables/" rel="attachment wp-att-3709"><img class="aligncenter size-full wp-image-3709" src="http://www.nrtm.de/wp-content/uploads/2011/11/tables.png" alt="" width="638" height="469" /></a></p>
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		<title>OpenData und der VVO</title>
		<link>http://www.nrtm.de/index.php/2011/11/05/opendata-und-der-vvo/</link>
		<comments>http://www.nrtm.de/index.php/2011/11/05/opendata-und-der-vvo/#comments</comments>
		<pubDate>Sat, 05 Nov 2011 14:53:48 +0000</pubDate>
		<dc:creator>jupp</dc:creator>
				<category><![CDATA[cultural]]></category>
		<category><![CDATA[political]]></category>
		<category><![CDATA[GTFS]]></category>
		<category><![CDATA[OpenData]]></category>
		<category><![CDATA[VVO]]></category>

		<guid isPermaLink="false">http://www.nrtm.de/?p=3690</guid>
		<description><![CDATA[Etwas genervt von meiner mobilen Fahrplan-Applikation für die Dresdener Verkehrsbetriebe habe ich einen Eintrag im Gästebuch des Verkehrsverbundes Oberelbe verfasst, um die mal darüber Nachdenken zu lassen, eventuell ihre Fahrpläne zu veröffentlichen. Eigentlich sollte so etwas selbstverständlich sein, ist aber in Deutschland kaum der Fall. Eine Initiative für Berlin mit toller Visualisierung gibt es schon eine ganze [...]]]></description>
			<content:encoded><![CDATA[<p>Etwas genervt von meiner mobilen Fahrplan-Applikation für die Dresdener Verkehrsbetriebe habe ich einen Eintrag im <a href="http://www.vvo-online.de/de/gaestebuch/index.aspx">Gästebuch</a> des Verkehrsverbundes Oberelbe verfasst, um die mal darüber Nachdenken zu lassen, eventuell ihre Fahrpläne zu veröffentlichen. Eigentlich sollte so etwas selbstverständlich sein, ist aber in Deutschland kaum der Fall. Eine Initiative für Berlin mit toller Visualisierung <a href="http://stefanwehrmeyer.com/projects/movingdots/#0">gibt es schon eine ganze Weile</a>.</p>
<p>Hier der Eintrag im Gästebuch (ist wohl noch in der Moderationswarteschlange):</p>
<blockquote><p>
Sehr geehrte Damen und Herren,</p>
<p>es würde mich sehr freuen, wenn der VVO ihre Fahrplandaten zur freien Verfügung in einem offenen Format anbieten würde. Dies würde es interessierten Fahrgästen ermöglichen, eigene Anwendungen auf diesen Daten aufbauend zu entwickeln und mit anderen zu teilen. Davon würden alle Fahrgäste und damit auch der VVO profitieren! In vielen anderen Städten weltweit ist die Bereitstellung im offenen GTFS-Format bereits Standard, Dresden und andere Sächsische Städte dürfen hier nicht den Anschluss verlieren.</p>
<p>Wenn sie einene Kostprobe davon wollen, was man mit solchen Daten alles machen kann, verweise ich z.B. auf http://www.mapnificent.net/budapest . Dort kann man sich eine Stadtkarte anzeigen lassen, in der man erkennt, welche Orte man in einer bestimmten Zeitspanne von einem ausgewälten Punkt mit öffentlichen Verkehrsmitteln erreichen kann. Soetwas ist sehr praktisch, wenn man z.B. eine neue Wohnung sucht, von der aus man mit ÖPNV in 10 Minuten seine Arbeit erreicht. Auch Nutzer von Mobilapplikationen auf Telefonen, sowie blinde und anderweitig Eingeschränkte Fahrgäste profitieren immens von offenen, maschinenlesbaren Fahrplänen.</p>
<p>Mit freundlichen Grüßen,</p>
<p>Jupp Müller
</p></blockquote>
<p>Es wäre toll, wenn ihr dem VVO auch schreibt, warum es eine gute Idee ist, die Fahrpläne zu veröffentlichen.</p>
<p><strong>Update:</strong><br />
Es gibt jetzt eine Antwort des VVO:</p>
<blockquote><p>Sehr geehrter Herr Müller,<br />
eine Bereitstellung der Daten in einem offenen Format ist nicht geplant. Für mobile Anwendungen stellt der VVO bereits die Webseite www.vvo-mobil.de zur Verfügung.<br />
Mit freundlichen Grüßen<br />
Ihr VVO</p></blockquote>
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		<title>Aus aktuellem Anlass &#8230;</title>
		<link>http://www.nrtm.de/index.php/2011/09/21/aus-aktuellem-anlass/</link>
		<comments>http://www.nrtm.de/index.php/2011/09/21/aus-aktuellem-anlass/#comments</comments>
		<pubDate>Wed, 21 Sep 2011 16:30:15 +0000</pubDate>
		<dc:creator>jupp</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.nrtm.de/?p=3597</guid>
		<description><![CDATA[]]></description>
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		<title>Live Encryption of Non-Bootable Partitions with OS X 10.7 Lion</title>
		<link>http://www.nrtm.de/index.php/2011/07/04/live-encryption-of-non-bootable-partitions-with-os-x-10-7-lion/</link>
		<comments>http://www.nrtm.de/index.php/2011/07/04/live-encryption-of-non-bootable-partitions-with-os-x-10-7-lion/#comments</comments>
		<pubDate>Mon, 04 Jul 2011 13:09:43 +0000</pubDate>
		<dc:creator>jupp</dc:creator>
				<category><![CDATA[management]]></category>
		<category><![CDATA[software]]></category>

		<guid isPermaLink="false">http://www.nrtm.de/?p=3479</guid>
		<description><![CDATA[With many people looking forward to the release of OS X 10.7 Lion, whole disk encryption (WDE) is on top of many nerd&#8217;s looking-forward-to list. With most regular setups, this works unproblematically. However, if you have multiple partitions and/or disks, the benefits of live encryption &#8211; encrypting your data on the fly without having to [...]]]></description>
			<content:encoded><![CDATA[<p>With many people looking forward to the release of OS X 10.7 Lion, whole disk encryption (WDE) is on top of many nerd&#8217;s looking-forward-to list. With most regular setups, this works <a href="http://www.appleinsider.com/articles/11/02/28/inside_mac_os_x_10_7_lion_file_vault_full_disk_encryption_and_cloud_key_storage.html">unproblematically</a>. However, if you have multiple partitions and/or disks, the benefits of live encryption &#8211; encrypting your data on the fly without having to reformat &#8211; are not supported by the System Preferences UI.</p>
<p>However, there is a surprisingly straightforward way to migrate your drives (be it &#8211; as in my case &#8211; a second internal hard disk or your thumb drive, etc). OS X&#8217; Core Storage service supports drive encryption on the fly via the <a href="http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man8/diskutil.8">diskutil</a> command using the following syntax:</p>
<p><code><br />
diskutil cs convert /dev/diskXXsYY -passphrase<br />
</code></p>
<p>where diskXXsYY represents the partition you want to encrypt. Diskutil will try to unmount the partition in order to convert it to a logical Core Storage volume. If that&#8217;s not possible (as in my case where my home directory resides inside), you will have to restart the system. Otherwise, the conversion process will begin immediately. You can check on its progress by again using diskutil:</p>
<p><code><br />
diskutil cs list<br />
</code></p>
<p>which will list your partition as part of a new Core Storage Volume and state how much has been encrypted.</p>
<p>One last warning: to the best of my knowledge, the encrypted volumes can only be mounted after a user has logged in (even if the passphrase has been stored in the system keychain). I had to migrate parts of my home folder to the system disk, because Lion would refuse to log me in otherwise. Needless to say, it may take a while for big disks to be encrypted (16h for my 1TB drive).</p>
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		<title>Tex-Symbole Nachschlagen</title>
		<link>http://www.nrtm.de/index.php/2011/01/08/tex-symbole-nachschlagen/</link>
		<comments>http://www.nrtm.de/index.php/2011/01/08/tex-symbole-nachschlagen/#comments</comments>
		<pubDate>Sat, 08 Jan 2011 15:35:07 +0000</pubDate>
		<dc:creator>jupp</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.nrtm.de/?p=3150</guid>
		<description><![CDATA[Der Screenshot erklärt alles, eine super Idee!]]></description>
			<content:encoded><![CDATA[<p><a href="http://detexify.kirelabs.org/classify.html">Der Screenshot erklärt alles, eine super Idee!</a></p>
<p style="text-align: center"><a rel="attachment wp-att-3154" href="http://www.nrtm.de/index.php/2011/01/08/tex-symbole-nachschlagen/detexify-2/"><img class="aligncenter size-large wp-image-3154" src="http://www.nrtm.de/wp-content/uploads/2011/01/detexify1-1024x627.jpg" alt="" width="573" height="351" /></a></p>
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		<title>Unvollständige RSS-Feeds befreien</title>
		<link>http://www.nrtm.de/index.php/2010/10/27/unvollstandige-rss-feeds-befreien/</link>
		<comments>http://www.nrtm.de/index.php/2010/10/27/unvollstandige-rss-feeds-befreien/#comments</comments>
		<pubDate>Wed, 27 Oct 2010 08:42:19 +0000</pubDate>
		<dc:creator>jupp</dc:creator>
				<category><![CDATA[cultural]]></category>
		<category><![CDATA[news]]></category>
		<category><![CDATA[software]]></category>

		<guid isPermaLink="false">http://www.nrtm.de/?p=3008</guid>
		<description><![CDATA[Jeder kennt das Problem: viele, besonders kommerzielle, Webseiten wollen zwar modern sein und ihre Inhalte per RSS anbieten, auf der anderen Seite aber verhindern, dass ihre Leser die Inhalte per RSS konsumieren und gar nicht mehr auf die oft mit Werbung überladenen Webseiten schauen. Hier hilft WizardRSS, ein praktischer Webservice der die im RSS-Feed enthaltenen [...]]]></description>
			<content:encoded><![CDATA[<p>Jeder kennt das Problem: viele, besonders kommerzielle, Webseiten wollen zwar modern sein und ihre Inhalte per RSS anbieten, auf der anderen Seite aber verhindern, dass ihre Leser die Inhalte per RSS konsumieren und gar nicht mehr auf die oft mit Werbung überladenen Webseiten schauen.</p>
<p>Hier hilft <a href="http://www.wizardrss.com">WizardRSS</a>, ein praktischer Webservice der die im RSS-Feed enthaltenen Links auf den Originalartikel nutzt, um einen vollständigen RSS-Feed mit dem gesamten Artikel inklusive aller Bilder zu erstellen, sehr zu empfehlen.</p>
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