title: Cannot create a symlink inside of /usr/bin even as sudo
body: <p>When I try to symlink a binary in my /usr/bin folder, I get an Operation not permitted error:</p>
  
  <pre><code> sudo ln -s /usr/bin/python2.7 /usr/bin/python2
  ln: /usr/bin/python2: Operation not permitted
  </code></pre>
  
  <p>Even as sudo, I get this error.</p>