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-owncloud-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 16:39:17 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum b6c114c026faab6052897ef571b1b54cc0abb769 * md5sum 79e2a525d0333e64d76a9a901760cb91 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) iQEcBAABAgAGBQJQM7mrAAoJEIXCXpWhbrlN9mgIAIxpFeX9kSOyn8ggnSSfQAfD 3cO/Ue8k/lmZ7DDg6qtu5OsrQ0BWWto29vhLCbZayUyMmuEIKyY6nNy+hHBO8lTX t6fH6tAtnFuOPpOrdUF4l3eoar26ODa5fEcPL8urcnCqszFJvM3XxeAfXmkpnrxs kRkXMcd90oO682dLhjJDtN6ow6MfU6Danj2d70mOjdYx5JAI9wYY/fnYRS8WIgz5 XmdlU+joLXwlPsINOHSvowE03LIuIFUAAhslP4HqvyarsqdZQ2kkYlDR3QPL1pHz TwD7ZVucpOZaLV2VIw3T2rGA4sBJvHHT3trQacyA4TFw2YToAeZpYLdku54e3RM= =4RJz -----END PGP SIGNATURE-----