Photoshop Tutorial

This is a popular texture for interface design.

Create a new document 512 x 512 pixels.
Make a new layer and fill with gray:
R: 170
G: 176
B: 184

Apply filter:
Texture / Grain...
Intensity: 14
Contrast: 50
Grain Type: Soft

Make a new layer and fill with gray:
R: 129
G: 129
B: 129

Apply Filter:
Noise / Add Noise...
Amount: 50%
Distribution: Uniform
Monochromatic: Checked

Apply Filter:
Blur / Motion Blur...
Angle: 0°
Distance: 100

Set layer adjustment to Overlay

You will find that the left and right sides of the image look a little messy. Ensure you always start with a canvas larger than you require, so you can trim these areas when you have completed this process.

Done!