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-roundup-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 16:54:51 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 5097edfc8544cf76ef21c8ed48334e2746716a67 * md5sum d9c3a482177feda429d117b24183feda 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) iQEcBAABAgAGBQJQM71TAAoJEIXCXpWhbrlN/M8IAJijHL2SL6X8YxjJ+rIRUuzp IKdcbQbRbSua63zHBhcY57hdzYE2mMGg1TNGHoSHmlsOZF/kdpe4oTT1n82rEQKp wY4rdCTATKUsx2y5GWNy34icL7JfYcEHXdlP5VGLTlfffGMIXKyt+pJPr/EJwBzX PHBvZcHj0NH8RYaR5/M1NfiEmUQhDKkJTyHRMKFn4vB3RwlxzckNFVllZeOGUGNW 2XdoC+t1XJvB+Qw1RkGkdfVf3l8T+FO17UwNnk0XDP3BPmwR3TMqWbmOGZmgqjKy d6bhGsqnpCmvvUeXuYLQWIuYNnm1h32LT3A9K6f4KXlh0/xXg8oTHVnxycHrH0Q= =1H0V -----END PGP SIGNATURE-----