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-mysql-12.0-squeeze-x86.iso.sig gpg: Signature made Sat Aug 18 17:32:22 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 2fcb9be01aa6dd51cf6610bce7f1c6789e90c841 * md5sum 91a1e44736a5bd7eac6f1352c873ba53 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) iQEcBAABAgAGBQJQL9GdAAoJEIXCXpWhbrlNgnIH/3EkzMn5Dz7QDs8aznIV1DeO oC7lB73pRG4P9Su5UugLqjd8wmcBHxlc2zXmIGQCEQFueigdvcD5VsE81iNBNREK CS1TJOlQhb5F02hjVbu8HV9ek0Gs77vvcJ8juyvuy7WwhlbFQ6bP2USrAezOunlR FTDIq2Jv3/oKzYcKn0G66HeZDzhwtDwuDctANpPK2B2UZ8wzoT5TWH3p0kbi2DN/ ABc5DGrf4ErDDTZiv5PR2/XCefrokyYb+GFS9l7ysNy8OW5VAHPdUCeEo0DU+4qV X2YvM7mLVYShKPzHyC8VTCfNtE4KVP3bWCwp+/5hbHzXkHI5BODDngPHg3lWFBU= =Y5CX -----END PGP SIGNATURE-----