This signature file may be used to cryptographically verify file integrity, like this:: $ gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0xA16EB94D $ gpg --list-keys 0xA16EB94D pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] uid Turnkey Linux Release Key $ gpg --verify turnkey-sitracker-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 16:53:24 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 53d105cea563c5bd94d48cafc0675ff000f4304c * md5sum 41cdd06239926aad63a2ecc299dbceae You can calculate these on your end and compare to check for errors, but cryptographic verification is recommended for security reasons. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJQM7z7AAoJEIXCXpWhbrlNTUEIANo1GscUfibwqHFi42C6ByfY JiLkalul6gIAYEAJDXiuSGgfS3K79FghVNTtmzyKEG97MtsFkymB1mhiwv17/ixI h2W31ijnqL/UsLbOvbryV+NMKqRDCsM5wfCLOeVnwkkCqvtXthzU7QWHRsq0FxWl kwdvG5vRrz4jw0sQsS+sI+zuRLz0YmWJ7w1yIetGbik++8qIL0/VkFA5UdJ7rGxE RJ4jmcys1Yr3NErDxWnrzOCWE+R6Db3VklLufvig5JLeEicDeDK7YXRp5PQ6K7oI CBlmJYHX9upMEt2/i4fbe6btTXi2D1YGLM9RXNntzN09ByuUT5WGlP3+Bf6dUDw= =vSpG -----END PGP SIGNATURE-----