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 debian-7-turnkey-roundup_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 10:08:59 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 7f69bbdbd859a89a63876397a560474e62bef5e4 * md5sum 1d29d3e5ab92c57d5aadeac915d6ef26 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 v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSXmW1AAoJEIXCXpWhbrlNGtMH/jnnGZ6iDDfOxKmn2D0jSk07 qHasAgKwMsGWt+Eu/7EVulbn2fp2BVJ2syL2GmahYySuVXjfKYH7NJXRK3gLziGP 1fiIIriBFPqU3u5+gWZXtktCHhlEQybCuy4u9vi1zzzBSQXdL2MOIuHxrqjuSc6M 5zHBy75FOdeR8vsqkZbAETp4grCxrM3mZ04ZWjHITg02Kc+tynKV6yOxuOWMyqjg QtpuCfWKh3WHCpvLylvFOeO+XmzLF3QsoD7AEp9dCIi1UPUcMNZMxayk4T4majzd uSlnb2QrCCV9zKKnV9ChH5PzhvlXjjVzwjk+HwG3koIf8YkwSWqTVAu4JKEzE1k= =XEDj -----END PGP SIGNATURE-----