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<a href="https://frommelmak.com" class="text-dark text-decoration-none">frommelmak</a>
<small class="text-secondary"><small>Yet another Melmacian interested in technology...</small></small>
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<h2><a href="https://frommelmak.com/force-an-old-version-of-tls.html" rel="bookmark" title="Permalink to Force an old version of TLS">Force an old version of <span class="caps">TLS</span></a></h2>
</header>
<div><p>If you -for whatever reason- need to force the old <span class="caps">TLS</span>-1.0, you can put the folllowing line en the Apache’s <code>/etc/apache2/mods-enabled/ssl.conf</code> file.</p>
<div class="highlight pygments-style-monokai rounded shadow-sm mb-3"><pre><span></span><code>SSLProtocol All -TLSv1.1 -TLSv1.2
</code></pre></div>
<p><em>Note</em>: <span class="caps">TLS</span>-1.0 is broken and is considered insecure. This version of the protocol …</p></div>
<div><a class="btn btn-primary" href="https://frommelmak.com/force-an-old-version-of-tls.html"><strong>➟ Read more</strong></a></div>
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<h2><a href="https://frommelmak.com/nginxs-map-module-to-deal-with-real-life-problems.html" rel="bookmark" title="Permalink to Nginx’s map module to deal with real life problems">Nginx’s map module to deal with real life problems</a></h2>
</header>
<div><p>I’ll try to show you how to use nginx’s log and map modules to put different header values from the http requests into the same place in the log files.</p>
<p>Imagine you have two kind of http request. One provides some info in an optional http header (like …</p></div>
<div><a class="btn btn-primary" href="https://frommelmak.com/nginxs-map-module-to-deal-with-real-life-problems.html"><strong>➟ Read more</strong></a></div>
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<h2><a href="https://frommelmak.com/increase-volume-size-using-elastic-volumes.html" rel="bookmark" title="Permalink to Increase volume size using Elastic Volumes">Increase volume size using Elastic Volumes</a></h2>
</header>
<div><p>On February 2017, <span class="caps">AWS</span> <a href="https://aws.amazon.com/blogs/aws/amazon-ebs-update-new-elastic-volumes-change-everything/">announced</a> the availability of a new <span class="caps">EBS</span> feature called Elastic Volumes. The new feature allows you to increase the size, performance and type and of your <span class="caps">EBS</span> volumes while in use. In order to take adantage of this great feature some requisites needs to be done …</p></div>
<div><a class="btn btn-primary" href="https://frommelmak.com/increase-volume-size-using-elastic-volumes.html"><strong>➟ Read more</strong></a></div>
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<h2><a href="https://frommelmak.com/modificar-ficheros-de-una-imagen-de-disco-particionada.html" rel="bookmark" title="Permalink to Modificar ficheros de una imagen de disco particionada">Modificar ficheros de una imagen de disco particionada</a></h2>
</header>
<div><p>En ocasiones disponemos de una imagen <span class="caps">RAW</span> de disco sobre la que queremos realizar cambios, pero queremos ahorrarnos el proceso de: </p>
<ul>
<li>Copiar el fichero de imagen a un dispositivo con ”dd”.</li>
<li>Montar el dispositivo para tener acceso a los filesystems del mismo.</li>
<li>Realizar cambios sobre los ficheros.</li>
<li>Volver a generar …</li></ul></div>
<div><a class="btn btn-primary" href="https://frommelmak.com/modificar-ficheros-de-una-imagen-de-disco-particionada.html"><strong>➟ Read more</strong></a></div>
</article>
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<h2><a href="https://frommelmak.com/utilizar-certificados-ssl-en-amazon-elb.html" rel="bookmark" title="Permalink to Utilizar certificados SSL en Amazon ELB">Utilizar certificados <span class="caps">SSL</span> en Amazon <span class="caps">ELB</span></a></h2>
</header>
<div><p>En esta entrada voy a tratar de explicar cómo utilizar el servicio de balanceo de carga de Amazon (<span class="caps">ELB</span>) como terminador de conexiones <span class="caps">SSL</span>.</p>
<p>El escenario de partida sería este:</p>
<p><img alt="ELB HTTP" src="/images/ELB_HTTP_server.png" class="img-fluid border rounded shadow image-process-article-photo"></p>
<p>Como se observa en este diagrama, todo el tráfico va en plano. Desde el cliente <span class="caps">HTTP</span> del usuario/aplicación hasta …</p></div>
<div><a class="btn btn-primary" href="https://frommelmak.com/utilizar-certificados-ssl-en-amazon-elb.html"><strong>➟ Read more</strong></a></div>
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<h2><a href="https://frommelmak.com/lsof-practical-usage-examples.html" rel="bookmark" title="Permalink to lsof: Practical usage examples">lsof: Practical usage examples</a></h2>
</header>
<div><p>As you probably know, <code>lsof</code> stands for List of Open Files. Yes, it’s seems a simple description for a simple Unix command but, wait! Have you ever heard that everything in Unix is a file? Yes, right? So maybe this tool is more powerful than you think.</p>
<p>Let me …</p></div>
<div><a class="btn btn-primary" href="https://frommelmak.com/lsof-practical-usage-examples.html"><strong>➟ Read more</strong></a></div>
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<h2><a href="https://frommelmak.com/how-to-add-puppet-syntax-highlighting-to-dokuwiki.html" rel="bookmark" title="Permalink to How to add Puppet syntax highlighting to Dokuwiki">How to add Puppet syntax highlighting to Dokuwiki</a></h2>
</header>
<div><p>As you probably know, Dokuwiki relies on <a href="http://qbnz.com/highlighter/">GeSHI</a> for syntax highlighting. Unfortunately, the current version of GeSHI does not support Puppet language. Nevertheless GeSHI allows you to add new languages easily by creating new language files, so to add Puppet support you just need to get a languaje file for …</p></div>
<div><a class="btn btn-primary" href="https://frommelmak.com/how-to-add-puppet-syntax-highlighting-to-dokuwiki.html"><strong>➟ Read more</strong></a></div>
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<hr>
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<h2><a href="https://frommelmak.com/rabbitmqctl-error-unable-to-connect-to-node.html" rel="bookmark" title="Permalink to rabbitmqctl: Error unable to connect to node">rabbitmqctl: Error unable to connect to node</a></h2>
</header>
<div><p>If you are running <code>rabbitmqctl</code> with a different user than the one used by server, you will get an error like this:</p>
<div class="highlight pygments-style-monokai rounded shadow-sm mb-3"><pre><span></span><code>rabbitmqctl status Status of node rabbit@foo
Error: unable to connect to node rabbit@foo: nodedown
- home dir: /root
- cookie hash: <span class="nv">0fWPcZtM431dRX003r6OAg</span><span class="o">==</span>
</code></pre></div>
<p>This is because the cookie stored …</p></div>
<div><a class="btn btn-primary" href="https://frommelmak.com/rabbitmqctl-error-unable-to-connect-to-node.html"><strong>➟ Read more</strong></a></div>
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<h2><a href="https://frommelmak.com/couchdb-how-to-continue-the-replication-processes-after-restart.html" rel="bookmark" title="Permalink to Couchdb: How to continue the replication processes after restart">Couchdb: How to continue the replication processes after restart</a></h2>
</header>
<div><p>As you probably know, the replication in couchdb is triggered by sending a <span class="caps">JSON</span> doc to the <code>_replicate</code> <span class="caps">URL</span> using a <span class="caps">POST</span> request. Something like that:</p>
<div class="highlight pygments-style-monokai rounded shadow-sm mb-3"><pre><span></span><code><span class="go">curl -X POST http://localhost:5984/_replicate -d '{source:http://src_ip:5984/src_db, target:dst_db, continuous:true}' -H 'Content-Type: application/json'</span>
</code></pre></div>
<p>The problem using …</p></div>
<div><a class="btn btn-primary" href="https://frommelmak.com/couchdb-how-to-continue-the-replication-processes-after-restart.html"><strong>➟ Read more</strong></a></div>
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<h2><a href="https://frommelmak.com/how-to-mount-a-zfs-drive-in-linux.html" rel="bookmark" title="Permalink to How to mount a ZFS drive in Linux">How to mount a <span class="caps">ZFS</span> drive in Linux</a></h2>
</header>
<div><p>First: Plug the <span class="caps">HDD</span> into a <span class="caps">SATA</span> to <span class="caps">USB</span> adapter (obvious).
Then find the device:</p>
<div class="highlight pygments-style-monokai rounded shadow-sm mb-3"><pre><span></span><code><span class="go">sfdisk -l</span>
</code></pre></div>
<p>In my case the device was <code>/dev/sdb1</code></p>
<p>Install zfs-fuse for your distro:</p>
<p><strong>Debian</strong>:</p>
<div class="highlight pygments-style-monokai rounded shadow-sm mb-3"><pre><span></span><code><span class="go">apt-get install zfs-fuse</span>
</code></pre></div>
<p><strong>OpenSUSE</strong>:</p>
<div class="highlight pygments-style-monokai rounded shadow-sm mb-3"><pre><span></span><code><span class="go">zypper install zfs-fuse</span>
</code></pre></div>
<p>Start the zfs fuse daemon:</p>
<div class="highlight pygments-style-monokai rounded shadow-sm mb-3"><pre><span></span><code>/etc/init.d/zfs-fuse start
super8:~ <span class="c1"># zpool …</span></code></pre></div></div>
<div><a class="btn btn-primary" href="https://frommelmak.com/how-to-mount-a-zfs-drive-in-linux.html"><strong>➟ Read more</strong></a></div>
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