title: replace URL using shell script
body: <p>I am getting below error while I try to replace one url? What is the efficient way to replace URL in all files in a give directory.</p>
  
  <pre><code>sed: -e expression #1, char 62: unknown option to `s'
  </code></pre>
  
  <p><code>find . -name '*' | xargs sed -i 's/old_url/new_url/g'</code> did not work</p>