want to have a look inside the updates to the ASL. But, mhhm, how can I decompress these files under linux. Maybe very simple thing but I´b I´ve never done before.
I haven't tried this myself, but here is a quick suggestion right off the top of my head: Try removing the .gpg suffix from the file name, which would leave the file last name as .tar, then try to open it. I suspect the updates are just a special case of tarred and gzipped archive files.
correct. .tar.gpg implies the file is an archive that is then encrypted. gpg -d .tar.gpg willl give you the decrypted tar archive, which you can then unpack.