title: Grep and SED not working in PowerShell
body: <p>I am trying to replace a url in more than 1000 files (using PowerShell). 
  That is replace <code>thomas.corp.test.com:81/gt/se.ashx</code> with <code>george.corp.test.com:91/gt/se.ashx</code>.</p>
  
  <p>I am able to execute it in a linux machine using the following command.</p>
  
  <pre><code>grep -lr http:\/\/thomas\.corp\.test\.com:81\/gt\/se\.ashx . |
    xargs sed -i '' 's/http:\/\/thomas\.corp\.test\.com:81\/gt\/se\.ashx/https:\/\/george\.corp\.test\.com:91\/gt\/se\.ashx/g' 
  </code></pre>
  
  <p>Need help in finding out an equivalent for PowerShell.</p>