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<channel>
	<title>Pinguino Press &#187; Notas rapidas</title>
	<atom:link href="http://www.polosur.org/blog/category/notas-rapidas/feed/" rel="self" type="application/rss+xml" />
	<link>http://www.polosur.org/blog</link>
	<description>El mundo que me interesa</description>
	<lastBuildDate>Fri, 16 Jul 2010 09:20:48 +0000</lastBuildDate>
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		<item>
		<title>DHCP: cuales son las ips asignadas</title>
		<link>http://www.polosur.org/blog/2010/01/dhcp-cuales-son-las-ips-asignadas/</link>
		<comments>http://www.polosur.org/blog/2010/01/dhcp-cuales-son-las-ips-asignadas/#comments</comments>
		<pubDate>Mon, 25 Jan 2010 09:34:33 +0000</pubDate>
		<dc:creator>Osro</dc:creator>
				<category><![CDATA[Debian]]></category>
		<category><![CDATA[Notas rapidas]]></category>
		<category><![CDATA[Software]]></category>
		<category><![CDATA[Software Libre]]></category>
		<category><![CDATA[sysadmin]]></category>
		<category><![CDATA[configuración]]></category>
		<category><![CDATA[dhcp]]></category>
		<category><![CDATA[ip]]></category>
		<category><![CDATA[servidores]]></category>

		<guid isPermaLink="false">http://www.polosur.org/blog/?p=580</guid>
		<description><![CDATA[Como identificar las direcciónes ip asignadas por el servidor dhcp]]></description>
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			</a>
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<p>Ejecutando el comando</p>
<blockquote><p>cat /var/lib/dhcp/dhcpd.leases  ó /var/lib/dhcp3/dhcpd.leases</p></blockquote>
<p>según sea el caso, es posible identificar cuantas, cuales, y a que maquinas ha asignado el servidor dhcp direciónes ip.</p>
<p>Nota: Gracias a la gente de la lista de usuarios debian en español <img src='http://www.polosur.org/blog/wp-includes/images/smilies/icon_wink.gif' alt=';-)' class='wp-smiley' /> </p>
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		</item>
		<item>
		<title>Cual es el fingerprint de una maquina?</title>
		<link>http://www.polosur.org/blog/2009/12/cual-es-el-fingerprint-de-una-maquina/</link>
		<comments>http://www.polosur.org/blog/2009/12/cual-es-el-fingerprint-de-una-maquina/#comments</comments>
		<pubDate>Mon, 21 Dec 2009 14:32:20 +0000</pubDate>
		<dc:creator>Osro</dc:creator>
				<category><![CDATA[Notas rapidas]]></category>
		<category><![CDATA[Software]]></category>
		<category><![CDATA[Software Libre]]></category>
		<category><![CDATA[sysadmin]]></category>
		<category><![CDATA[configuración]]></category>
		<category><![CDATA[Debian]]></category>
		<category><![CDATA[Fingerprint]]></category>
		<category><![CDATA[Forensic Science]]></category>
		<category><![CDATA[Security]]></category>

		<guid isPermaLink="false">http://www.polosur.org/blog/?p=573</guid>
		<description><![CDATA[Como obtener el fingerprint de un servidor ssh]]></description>
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			</a>
		</div>
<p style="text-align: left;" mce_style="text-align: left;">Todo administrador de red/sistemas medianamente preocupado por la seguridad, debe tener un lista actualizada de los <a mce_href="http://en.wikipedia.org/wiki/Public_key_fingerprint" href="http://en.wikipedia.org/wiki/Public_key_fingerprint">fingerprint</a> del servicio <a mce_href="http://es.wikipedia.org/wiki/Ssh" href="http://es.wikipedia.org/wiki/Ssh">ssh</a> de cada una de las maquinas que administra, esta información aparece la primera vez que conectamos con una maquina a través de ssh, pero como obtener este dato antes de la primera conexión o en cualquier otro momento?</p>
<p style="text-align: left;" mce_style="text-align: left;">Usando este comando.</p>
<p style="text-align: left;" mce_style="text-align: left;">
<p style=""><b><i>ssh-keygen -lf /etc/ssh/ssh_host_rsa_key.pub</i></b></p>
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<div>
<dl class="wp-caption alignright">
<dt class="wp-caption-dt"><a href="http://www.flickr.com/photos/12836528@N00/2422430207"><img src="http://farm3.static.flickr.com/2371/2422430207_01b2dcba11_m.jpg" alt="Fingerprints" title="Fingerprints"></a></dt>
<dd class="wp-caption-dd zemanta-img-attribution">Image by <a href="http://www.flickr.com/photos/12836528@N00/2422430207">kevindooley</a> via Flickr</dd>
</dl>
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<p style="text-align: left;" mce_style="text-align: left;"></p>
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		</item>
		<item>
		<title>Localización</title>
		<link>http://www.polosur.org/blog/2009/12/localizacion/</link>
		<comments>http://www.polosur.org/blog/2009/12/localizacion/#comments</comments>
		<pubDate>Fri, 04 Dec 2009 08:20:32 +0000</pubDate>
		<dc:creator>Osro</dc:creator>
				<category><![CDATA[Internet]]></category>
		<category><![CDATA[Notas rapidas]]></category>
		<category><![CDATA[Webs Recomendadas]]></category>
		<category><![CDATA[Blogs Recomendados]]></category>
		<category><![CDATA[futuro]]></category>
		<category><![CDATA[mapas]]></category>
		<category><![CDATA[social]]></category>

		<guid isPermaLink="false">http://www.polosur.org/blog/2009/12/i-love/</guid>
		<description><![CDATA[Parte del post sobre tendencias para el 2010 de Mashable]]></description>
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			</a>
		</div>
<div style="border: 0px none; overflow: auto; margin-top: 25px; min-height: 50px; font-size: 11px; width: 456px; line-height: 16.8px; float: none;"><strong>Location, location, location</strong>Fueled by the ubiquity of GPS in modern smartphones, location-sharing services like <a style="text-decoration:underline; color: #2388BD;" href="http://www.foursquare.com/" target="new">Foursquare</a>, <a style="text-decoration:underline; color: #2388BD;" href="http://gowalla.com/" target="new">Gowalla</a>, <a style="text-decoration:underline; color: #2388BD;" href="http://brightkite.com/" target="new">Brightkite</a> and <a style="text-decoration:underline; color: #2388BD;" href="http://www.google.com/latitude" target="new">Google Latitude</a> are suddenly in vogue.</p>
<p>As I ruminated in this column two weeks ago, <a style="text-decoration:underline; color: #2388BD;" href="http://www.cnn.com/2009/TECH/11/19/cashmore.foursquare/">Foursquare and its ilk</a> may become the breakout services of the year &#8230; provided they&#8217;re not crushed by the addition of location-based features to Twitter and Facebook.</p>
<p>What&#8217;s clear is that location is not about any singular service; rather, it&#8217;s a new layer of the Web. Soon, our whereabouts may optionally be appended to every Tweet, blog comment, photo or video we post.</p></div>
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		</item>
		<item>
		<title>Terra se ha ido al garete</title>
		<link>http://www.polosur.org/blog/2009/06/terra-se-ha-ido-al-garete/</link>
		<comments>http://www.polosur.org/blog/2009/06/terra-se-ha-ido-al-garete/#comments</comments>
		<pubDate>Mon, 22 Jun 2009 07:00:34 +0000</pubDate>
		<dc:creator>Osro</dc:creator>
				<category><![CDATA[Internet]]></category>
		<category><![CDATA[Notas rapidas]]></category>

		<guid isPermaLink="false">http://www.polosur.org/blog/?p=487</guid>
		<description><![CDATA[La web de terra rota por un error de los mas tonto.]]></description>
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			</a>
		</div>
<p>Pues eso, que la web de <a href="http://www.terra.es">Terra</a> se ha roto hoy es lunes 22 de junio son las 6:56 GMT, quien sabe desde cuando y hasta cuando.</p>
<div id="attachment_488" class="wp-caption alignleft" style="width: 310px"><a href="http://www.polosur.org/nblog/wp-content/uploads/2009/06/terra.png"><img src="http://www.polosur.org/blog/wp-content/uploads/2009/06/terra-300x176.png" alt="Web de Terrra" title="terra" width="300" height="176" class="size-medium wp-image-488" /></a><p class="wp-caption-text">Web de Terrra</p></div>
<p>Y todo por una tontería como esta:</p>
<p><a href="http://www.polosur.org/nblog/wp-content/uploads/2009/06/terra_codigo.png"><img src="http://www.polosur.org/blog/wp-content/uploads/2009/06/terra_codigo-300x176.png" alt="terra_codigo" title="terra_codigo" width="300" height="176" class="alignleft size-medium wp-image-489" /></a></p>
<p>Imagino yo que en <a href="http://www.microsoft.com/windows/internet-explorer/default.aspx">IE</a> funcionara, correctamente por que como ese navegador pasa de todo.</p>
<p>Nota: <a href="http://buscon.rae.es/draeI/SrvltConsulta?TIPO_BUS=3&#038;LEMA=garete">que es garete?</a></p>
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		<item>
		<title>Google Earth &#8211; Nuevos terrenos 3D de alta resolución</title>
		<link>http://www.polosur.org/blog/2009/05/google-earth-nuevos-terrenos-3d-de-alta-resolucion/</link>
		<comments>http://www.polosur.org/blog/2009/05/google-earth-nuevos-terrenos-3d-de-alta-resolucion/#comments</comments>
		<pubDate>Fri, 15 May 2009 08:21:13 +0000</pubDate>
		<dc:creator>Osro</dc:creator>
				<category><![CDATA[Internet]]></category>
		<category><![CDATA[Medio Ambiente]]></category>
		<category><![CDATA[Notas rapidas]]></category>
		<category><![CDATA[Software]]></category>
		<category><![CDATA[Webs Recomendadas]]></category>
		<category><![CDATA[google]]></category>
		<category><![CDATA[mapas]]></category>
		<category><![CDATA[trackbacks]]></category>

		<guid isPermaLink="false">http://www.polosur.org/blog/?p=448</guid>
		<description><![CDATA[Captura de pantalla de Google Earh comentada sobre terrenos 3D de alta resolución]]></description>
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			</a>
		</div>
<p>He leeido en <a href="http://">Google Earth Blog</a> que Google ha agregado nuevos terrrenos 3D de alta resolución, y dentro de las nuevas zonas esta Madrid, de forma que he decidido darme un paseo por allí y me he encontrado cosas como la de esta imagen.</p>
<div id="attachment_449" class="wp-caption aligncenter" style="width: 310px"><a href="http://www.polosur.org/nblog/wp-content/uploads/2009/05/pantallazo-google-earth.png"><img src="http://www.polosur.org/blog/wp-content/uploads/2009/05/pantallazo-google-earth-300x176.png" alt="pantallazo-google-earth" title="Puentes Caidos" width="300" height="176" class="size-medium wp-image-449" /></a><p class="wp-caption-text">pantallazo-google-earth</p></div>
<p>Los puentes parecen haber caído</p>
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		</item>
		<item>
		<title>Histórico de aptitude</title>
		<link>http://www.polosur.org/blog/2009/05/historico-de-aptitude/</link>
		<comments>http://www.polosur.org/blog/2009/05/historico-de-aptitude/#comments</comments>
		<pubDate>Wed, 13 May 2009 09:09:05 +0000</pubDate>
		<dc:creator>Osro</dc:creator>
				<category><![CDATA[Debian]]></category>
		<category><![CDATA[Notas rapidas]]></category>
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		<guid isPermaLink="false">http://www.polosur.org/blog/?p=445</guid>
		<description><![CDATA[Nota rápida sobre el histórico de aptitude]]></description>
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<p>Gracias a Kebianizao del canal #debian-es en irc.oftc.net he encontrado que <a href="http://wiki.debian.org/Aptitude">aptitude</a> tiene un histórico de acciones igual que lo hace <a href="http://www.nongnu.org/synaptic/">synaptic</a> (igual synaptic se basa en el histórico de aptitude).</p>
<p>El histórico de acciones de aptitude esta en <em>/var/log/aptitude</em>.</p>
<div id="attachment_446" class="wp-caption aligncenter" style="width: 310px"><a href="http://www.polosur.org/nblog/wp-content/uploads/2009/05/aptitude.png"><img src="http://www.polosur.org/blog/wp-content/uploads/2009/05/aptitude-300x187.png" alt="Screenshot de aptitude" title="aptitude" width="300" height="187" class="size-medium wp-image-446" /></a><p class="wp-caption-text">Screenshot de aptitude</p></div>
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		<title>Max directorios en ext3 y ext4</title>
		<link>http://www.polosur.org/blog/2009/04/numero-maximo-de-directorios-en-ext3-y-ext4/</link>
		<comments>http://www.polosur.org/blog/2009/04/numero-maximo-de-directorios-en-ext3-y-ext4/#comments</comments>
		<pubDate>Wed, 22 Apr 2009 06:54:42 +0000</pubDate>
		<dc:creator>Osro</dc:creator>
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		<category><![CDATA[ext3]]></category>
		<category><![CDATA[ext4]]></category>
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		<category><![CDATA[sistema de archivos]]></category>

		<guid isPermaLink="false">http://www.polosur.org/blog/?p=417</guid>
		<description><![CDATA[Nota rápida para no olvidar datos sobre ext3 y ext4]]></description>
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			</a>
		</div>
<p>&#8221; El número máximo de subdirectorios que puede contener un solo directorio en Ext3 es 32.000. Ext4 rompe ese límite y permite un número ilimitado de subdirectorios.&#8221;</p>
<p>En la practica 31998 ya que . y .. también cuentan.</p>
<p>Para probarlo</p>
<p><em>mkdir ~test<br />
cd test<br />
for i in `seq 1 31998`<br />
do<br />
mkdir $i<br />
echo $i<br />
done</em></p>
<p>Visto en:<a href=" http://diegocg.blogspot.com/2008/12/ext4-lo-que-traer-linux-2628-parte-i.html "> http://diegocg.blogspot.com/2008/12/ext4-lo-que-traer-linux-2628-parte-i.html<br />
</a><br />
Diego Calleja es uno de mis bloggers favoritos, post muy técnicos y bien explicados.</p>
<p>Gracias Diego.</p>
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		<item>
		<title>Mas comandos de vim</title>
		<link>http://www.polosur.org/blog/2009/01/mas-comandos-de-vim/</link>
		<comments>http://www.polosur.org/blog/2009/01/mas-comandos-de-vim/#comments</comments>
		<pubDate>Tue, 20 Jan 2009 21:45:17 +0000</pubDate>
		<dc:creator>Osro</dc:creator>
				<category><![CDATA[Notas rapidas]]></category>
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		<guid isPermaLink="false">http://www.polosur.org/blog/2009/01/20/mas-comandos-de-vim</guid>
		<description><![CDATA[Comandos útiles de vim]]></description>
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			</a>
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<p>Hoy he aprendido algunos nuevos comandos de vim.</p>
<ul>
<li>Como ver los caracteres no imprimibles con vim?</li>
</ul>
<p><i><br /></i></p>
<div align="center"><i>:set list</i></div>
<ul>
<li>Añadir un carácter al final de la linea </li>
</ul>
<div align="center"><i><br />:1,$s/$/-/g</i></div>
<ul>
<li>Unir todas las lineas y dejarlas como una única linea.</li>
</ul>
<p><div align="center">Pasar al modo visual</p>
<p><i>:v</i></p>
<p>Seleccionar las lineas a unir y luego</p>
<p>&nbsp;<i>J</i></div>
<p>vim is great!!<br />Tags Technorati: <a class="performancingtags" href="http://technorati.com/tag/vim" rel="tag">vim</a></p>
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		<item>
		<title>Las palabras que dejare de escuchar</title>
		<link>http://www.polosur.org/blog/2009/01/las-palabras-que-dejare-de-escuchar/</link>
		<comments>http://www.polosur.org/blog/2009/01/las-palabras-que-dejare-de-escuchar/#comments</comments>
		<pubDate>Sun, 18 Jan 2009 17:28:01 +0000</pubDate>
		<dc:creator>Osro</dc:creator>
				<category><![CDATA[Filosofo-ando]]></category>
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		<category><![CDATA[pensamientos]]></category>
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		<guid isPermaLink="false">http://www.polosur.org/blog/2009/01/18/las-palabras-que-dejare-de-escuchar</guid>
		<description><![CDATA[Algo que he escuchado en los últimos días y creo que me viene bien apuntarlo aquí para no olvidar.]]></description>
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<p>1. No lo lograre<br />2. Critica<br />3. Preocupación<br />4. Victimismo<br />5. Perfección</p>
<p>Es decir.</p>
<p>Dejare de pensar que no podre hacer algo, antes de empezar a hacerlo.<br />Dejare de criticar mis actos a menos que esto sea para hacerlos mejor.<br />Dejare de preocuparme por el futuro y actuare en el presente para que ese futuro sea esplendido.<br />Dejare de pensar que parto con desventaja por mis limitaciones, los demás también tienen las suyas<br />Dejare de pensar que la perfección es sinónimo de excelencia.</p>
<p>Bueno pues esto lo digo hoy .. ya veremos que nos depara el mañana <img src='http://www.polosur.org/blog/wp-includes/images/smilies/icon_wink.gif' alt=';-)' class='wp-smiley' /> </p>
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		<title>Plugins en vim</title>
		<link>http://www.polosur.org/blog/2009/01/plugins-en-vim/</link>
		<comments>http://www.polosur.org/blog/2009/01/plugins-en-vim/#comments</comments>
		<pubDate>Thu, 08 Jan 2009 12:58:55 +0000</pubDate>
		<dc:creator>Osro</dc:creator>
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		<category><![CDATA[plugins]]></category>

		<guid isPermaLink="false">http://www.polosur.org/blog/?p=330</guid>
		<description><![CDATA[Descripción del plugin NERDTree para vim]]></description>
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<p>Hace un tiempo que me estaba interesando por los diversos <a href="http://www.vim.org/scripts/script_search_results.php">plugins</a> que hay para <a href="http://es.wikipedia.org/wiki/Vim">vim</a> pero no habia probado ninguno por falta de tiempo o de dedicación creo yo, pero hoy gracias a<a href="http://www.juantomas.net/"> Juan Tomas</a> he encontrado un plugin &#8220;la mar&#8221; de interesante.</p>
<p>Siempre fue un problema para mi usar :sp o :e para abrir un fichero que.. bueno a pesar que el area de comandos va completando la ruta del sistema de fichersos en ocaciones es mas practico ver el arbol de directorios.</p>
<p>Bueno, pues para eso existe <a href="http://www.vim.org/scripts/script.php?script_id=1658">NERDTree</a> un muy util plugin que te permite ver el arbol de directorios dentro de vim, algo como esto:</p>
<div id="attachment_331" class="wp-caption aligncenter" style="width: 310px"><a href="http://www.polosur.org/nblog/wp-content/uploads/2009/01/nerdtree.png"><img src="http://www.polosur.org/blog/wp-content/uploads/2009/01/nerdtree-300x187.png" alt="NERDTree ejecutandoce en Vim" title="nerdtree" width="300" height="187" class="size-medium wp-image-331" /></a><p class="wp-caption-text">NERDTree ejecutandoce en Vim</p></div>
<p>Ahora la explición.</p>
<p>1. Instalarlo.</p>
<p>Para instalarlo basta con ir a la pagina del plugin <a href="http://www.vim.org/scripts/script.php?script_id=1658">NERDTree</a> descargar la ultima versión, esta al final de la pagina y son ficheros .zip</p>
<p>crear un directorio oculto dentro de tu home llamado .vim</p>
<p><em>cd ~<br />
mkdir .vim</em></p>
<p>y descomprimir el .zip de NERDTree dentro de .vim</p>
<p>Esto crea dos directorios doc y plugins.</p>
<p><strong>YA ESTA!!</strong></p>
<p>ahora a usarlo</p>
<p>2. Ejecutar NERDTree dentro de vim:</p>
<p>Una ves ejectuado vim simplemente  :NERDTree</p>
<p>esto ya te abre el arbol de directorios  para desplazarte por el <strong><em> h,j,k,l</em></strong> como siempre en vim</p>
<p>para abrir un directorio o fichero  <strong><em>o</em></strong></p>
<p>Para abrir un directorio recursivamente <strong><em>O</em></strong></p>
<p>Para ver los ficheros ocultos <strong> <em>I</em></strong></p>
<p>con  <strong><em>? </em></strong> puedes ver todos los comandos.</p>
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