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-vtiger-12.1-squeeze-amd64.iso.sig gpg: Signature made Wed May 1 14:10:11 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 86461c36ee5116c4f6686fa305b922f920744efe * md5sum a72fefc8f247ad811a0251f4c326193e 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) iQEcBAABAgAGBQJRgSI7AAoJEIXCXpWhbrlNdoEIANIE1ZwJO+Ki6x1vK0LnDhlb 1jqWiEVp+xx6YDK564YAaX5MT6AWeXslnyt4OsWbsFShEoHRDjdx+Cd4c2HHKGFr osO7d44mE3GQoltprxVt57sf8Dx8fHYOJSBDTYihL15AOamM70yuzCH6kVNS0HyG TDvf94c1HUzASNM+LJyL0V1dgGh8NXOFGG48WAuZ5H9LPzcTMne80HUmtFoDPusf CPpgf9Y4HyZ88b6LKz2VXHyK+/YmoZHUdSn0e7nFWNAV4ikpur1wLXr/dVwjcfic BGdxzKA7ytb51Xajq/5/DtN/gMWpBdbz9m10nUGPTEc8/6VxTs/fYEuqTzqRxDI= =FUzE -----END PGP SIGNATURE-----