how to add a gradient background over img code example

Example 1: gradient over image css

#linear-gradient-over-image{
    background-image: linear-gradient(to bottom, black, white), 
      url('images/background.jpg');
    background-size: cover;
}

Example 2: background with image and gradient

body {
  background: #eb01a5;
  background-image: url("IMAGE_URL"); /* fallback */
  background-image: url("IMAGE_URL"), linear-gradient(#eb01a5, #d13531); /* W3C */
}