title: Linux Copy All Files with specific filename length
body: <p>I want to Copy all files in my directory with a specific file name length.</p>
  
  <p>e.g.
  These files exist: </p>
  
  <pre><code>1.py
  12.py
  123.py
  321.py
  1234.py
  </code></pre>
  
  <p>Than I want to copy only the files <code>123.py</code> and <code>312.py</code> (because of length of 3)
  I am new to Linux and don´t know how to accomplish this. Anyone can help me?</p>