Symfony2: how to override core template?

Question

I am trying to override SymfonyGeneratorBundle templates by creating

\\app\\Resources\\SensioGeneratorBundle\\skeleton\\crud\\views\\index.html.twig

Answer 1

The answer of m2mdas worked for me, but only after discovering that it should read

Filesystem instead of FileSystem!

Take a look at your vendors/symfony/.../Filesystem folder to verify this.