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-torrentserver-12.0-squeeze-x86.iso.sig gpg: Signature made Sat Aug 18 18:15:59 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 25fb6979ea1a47d6ed3dcf56bc94265107d0334a * md5sum 7aa72177589267d37148ab5d54e9769b 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) iQEcBAABAgAGBQJQL9vUAAoJEIXCXpWhbrlNeRgIAOEmxNIwwhtTG7K6aTB/PAjT GPdmxKBJES92hqZm+iMZXAx6tqTAxD1clzK5wUTMCrAN29PBfsyXXTpIUr3YHJSe cVHg/fqt/fIug41tPUs6lLTQyNo3MLh9bZtL9TcjNZZLTXDqHCik+iy99tizk0vs IhCCXcPYXWypp5MRNMNbx7UnddIgU22WLrex9keAQuM/UhQR6v5YovIixMJbFnrF JtMJqzAzoT/j81eWoSkWlmynoNMgvteF3L7Irov7DcEmW6VrKqGEFPqIcOKqpo58 M9/yAncYAydcTuXCRkmozMCEHa8I1uFtFOUd5iaNWjrlSu+ZlgA9tH2kiuPw7XM= =8RJe -----END PGP SIGNATURE-----