how to apply linear gradient to background image code example

Example 1: background with image and gradient

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

Example 2: linear-gradient(top to bottom)

/* A gradient going from the top to bottom
   starting red and finishing orange */

.class {
    background: linear-gradient(to bottom, #f32b60, #ff8f1f);
}

Example 3: linear gradient css background image

background-image: url("IMAGE_URL"), linear-gradient(#eb01a5, #d13531);

Example 4: background-image linear-gradient url

body {
    background-image: url("http://www.skrenta.com/images/stackoverflow.jpg"), linear-gradient(red, yellow);
    background-image: url("http://www.skrenta.com/images/stackoverflow.jpg"), -webkit-gradient(linear, left top, left bottom, from(red), to(yellow));
    background-image: url("http://www.skrenta.com/images/stackoverflow.jpg"), -moz-linear-gradient(top, red, yellow);
  }

Example 5: how to find the gradient linear of image

GradientFinder {
    fromUrl: function(url, onload),
    fromCanvas: function(canvas)
};