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-simplemachines-12.1-squeeze-i386-xen.tar.bz2.sig gpg: Signature made Wed Jun 5 00:29:41 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum e68ba1ae569a77c21cf3d53a9b75c7601aef4345 * md5sum 5e5715af6b8a1f5d6cee1ee59e078edb 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) iQEcBAABAgAGBQJRroZqAAoJEIXCXpWhbrlNjYEIANlUqEQfHz9P0pnAlUkBxFYG wfz6iByvQSvVJ6fEro7ByII9BDtjUAife+Az+kS0pAR7gXqHqUX94Q2EilN0et0J yAEv/Ubs2E0M6ylcpiVx8a3JJibihBpdZQjnYIGFEV0g1PjV2dVy51CDbh/xHX8m qGjEeHE2oHBKnVKyfZv4gb3wH642OiwuhIlr7UlnVuTEMHs/+u1DWAO8iDDvs5w7 oeEg4Q+BtSHVwa/v26cYNgWn5YOwoJTLSYhAmRJ0oVd3xTq9LfF8ixXUfR10loO/ DhFCSPu3+1G73C21RV1Yk/qgQtRrSSaMgH4wDLB7iG6ewtxkmq61ToPWAcD9VhA= =pHsy -----END PGP SIGNATURE-----