Concatenate multiple CSS files into one

Question

What is the best way to concatenate multiple CSS files into one CSS file?

I want to reduce the following ..

Answer 1

As long as the ordering of the arguments for cat matches the original ordering of the three referenced CSS files in the HTML file the cat-method should work as expected.

So given say ..

.. the following concaternation ..

cat css/one.css css/two.css css/three.css > css/all.css

.. together will the following reference ..

.. should be 100 % identical.