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-simpleinvoices-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 17:04:38 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 8d5a9d6ec85ac957b0139822f858042b6604e8f5 * md5sum f550b5bf2a7545b6657cd904f5845256 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) iQEcBAABAgAGBQJQM7+cAAoJEIXCXpWhbrlN2A4IAOrHA1nUFrZLlJVNZ36NnpW0 8zRzvVTDGWbYVYmSameQlwA4+67NtfFwQTtq38p7STccftnSYYd4fWSTsNA4/y9I oSLdQesanA/3mdsj0rs6FZukAzakCZgN/qVjDxMVSso6xTPha57PMazMmCzdHmSP gEVHyZfsWq3FyLAYSdTb7gJl6Pt5hgqr577EBp6M4jATaJrg94NAHt503RiCqm4D wmfHVoKUIgIhI/wD8PAS6HhCoq5Ca5ruwjdKgsU6kzvfJNL7U2Q4DU3UO6giJ3oE 5a9wnjByG2P3bxv1RLfFv+vJmIwYfgCOLyvwOqhuOpnn/xPwDUt3CwZp5+sGv8U= =XJFN -----END PGP SIGNATURE-----