title: How to check if a Unix .tar.gz file is a valid file without uncompressing?
body: <p>I have found the question <a href="https://stackoverflow.com/questions/1788236/how-to-determine-if-data-is-valid-tar-file">How to determine if data is valid tar file without a file?</a>, but I was wondering: is there a ready made command line solution?</p>