Cache Directory - tar

Regardless of where the application decides to (or is configured to) place its cache directory, it should place within this directory a file named:

CACHEDIR.TAG

This file must be an ordinary file, not for example a symbolic link. Additionally, the first 43 octets of this file must consist of the following ASCII header string:

Signature: 8a477f597d28d172789f06886806bc55

http://www.brynosaurus.com/cachedir/spec.html