title: Remove white spaces in file names and change file names from lower to upper case
body: <p>In <code>Windows</code>, I want to remove <code>white spaces</code> from file names and change the <code>lower case</code> to <code>upper case</code>.</p>
  <pre><code>file 1.txt  --&gt;  FILE1.TXT
  File 2.txt  --&gt;  FILE2.TXT
  Test 1.txt  --&gt;  TEST1.TXT
  </code></pre>
  <p>I tried something like this (which is not working) on <code>command prompt</code></p>
  <pre><code>rename &quot;*.txt&quot; &quot;*.TXT&quot;             # Works
  rename &quot;file*.txt&quot; &quot;FILE*.TXT&quot;
  rename &quot;Test*.txt&quot; &quot;TEST*.TXT&quot;
  </code></pre>