title: How does MacPorts install packages? How can I activate a Ruby installation done via MacPorts?
body: <p>After trying to install ruby19 on my machine (PPC, Mac OSX 10.5.7) using the following commandline</p>
  
  <pre><code>sudo port install ruby19
  </code></pre>
  
  <p>the version of ruby didn't change</p>
  
  <pre><code>ruby -v =&gt; ruby 1.8.6 (2008-08-11 patchlevel 287) [universal-darwin9.0]
  </code></pre>
  
  <p>I assume that i have two versions of it installed on my mac, but how do i use the latest one now?</p>