title: how to push this modified file to github repository
body: <p>how can i push this modified file in github</p>
  
  <pre><code>% git status
      # On branch master
      # Changed but not updated:
      #   (use "git add &lt;file&gt;..." to update what will be committed)
      #   (use "git checkout -- &lt;file&gt;..." to discard changes in working
      #   directory)
      #    modified:   login.php
      no changes added to commit (use "git add" and/or "git commit -a")
  </code></pre>