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 debian-7-turnkey-mantis_13.0-1_i386.ova.sig gpg: Signature made Tue Oct 15 16:49:07 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 5a56333348b868169b9f990f88ea34681c5d16b5 * md5sum edafdfd8a69f43192cac287d6df06d5f 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 v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSXXH9AAoJEIXCXpWhbrlNiB8H/3KPMptcvPVVASny/VkgM40V sA+Aem1mJn1S5O7MQ2C1aYagIUoZKqi+5hbb/+g/HexIUdgpbQgAim/0FTW97nNn UeAqIEDeuP/h8KERSc5EIfd7gDM9LTQcUvb0Bbj9MjCrewzRjVTkRDpViQfZjWh6 YdFbxCZx+gs39HdVAsr0A43tUhp1vsmWERRXbbuUFbSnTd1TdSGbb7Q0K+3d/z0x PLxtYtxurvHPvFwQ5o3Dv8xKHUcU+QBxPd/88SrZMTnVH+qqo9nA6n8c6Wq+XwOI 8tKX06nve/GVzzKeYKLfC4SO3UBv0qBQnutn2VaMAYcsjHcf5i5EOfD2Kbez0Es= =H3Dq -----END PGP SIGNATURE-----