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-12.1-squeeze-amd64-openstack.tar.gz.sig gpg: Signature made Tue Jun 4 16:12:05 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 628ecf5f0863c8d94f0b698a70094b1b5c2a7af9 * md5sum 59710cb027aa727713021dc75d4fff7e 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) iQEcBAABAgAGBQJRrhHNAAoJEIXCXpWhbrlNdnwH+wfvF22eKR+BVnjD4fn+aI9m aySEwh59awERtjipN7jo/0rlk3sgQYFOMRYraK5sQZq6pT4/qbVqQYo8hCF5R+bO G8sMRsw5+6ZRsxDqKxhr1u6q6NsXkw+3B02j3H84HlUzwWhOTnLdyStoadkAs+O5 14PkwxRFp3CBFi2747sdfmeoG9GQl52jsboFDMfv5VZhhwKCo1mJpnGHkMOUx1ci AAKX2sVQPsofeHC/WGgV6kfzHB79b9rqw3nIh97OGqCql0gVYPCJM54zzkUcnfhM eCFXHJYfzH3AkpB5GEsRMLl26q76CQohMMqb4NmNj67/rGKm6WzzuNWhaKzLQJ0= =xvUJ -----END PGP SIGNATURE-----