title: How to uninstall or upgrade Erlang/OTP?
body: <p>How can I uninstall <strong>Erlang/OTP</strong> which I use <code>make install</code> to build from source earlier. The install is pretty simple by using <code>./configure;make;make install;</code></p>
  
  <p>The reason to uninstall is that I want to upgrade from <strong>Erlang R15B01</strong> to <strong>Erlang R15B03</strong>. </p>
  
  <p>Now I have:</p>
  
  <pre><code># erl --version
  Erlang R15B01 (erts-5.9.1) [source] [64-bit] [smp:2:2] [async-threads:0] [hipe] [kernel-poll:false]
  
  Eshell V5.9.1  (abort with ^G)
  1&gt;
  </code></pre>