title: Change multiple files
body: <p>The following command is correctly changing the contents of 2 files.</p>
  
  <pre><code>sed -i 's/abc/xyz/g' xaa1 xab1 
  </code></pre>
  
  <p>But what I need to do is to change several such files dynamically and I do not know the file names. I want to write a command that will read all the files from current directory starting with <code>xa*</code> and <code>sed</code> should change the file contents.</p>