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-cakephp_13.0-1_i386.ova.sig gpg: Signature made Tue Oct 15 14:59:53 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 65086e2a57de07287b9021080aa3f9845b84e557 * md5sum d88f2ae4278bc5edfe9ee429d8b966ef 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) iQEcBAABAgAGBQJSXVhiAAoJEIXCXpWhbrlNGfYIAKFJGCXRjvRD3W/ZZnWUKrd7 iJdKqTU50dpFWm/Lpnr8vAyQEdr6JMT+s4gmyhOEtOfBpSo/AYACVM9NBvvPAmXT CAvOLf5qonhQRGELLZWIXl+qIzN+UsWU2GeAVk1VYiodkIDzu+Xy78CCLDahenMP o0yYroeaYyQPAM/IU7Zf1zmkQIU5RzmEoOiKiIEGYjj7AzG83eJqoG215iRloHFV yt8tm2Rb54OaFwoNKH1vKMwphLaGrTBKOfesQXP2Z/bGaBGqS0hT4eKdieWXDfWb idPTyqaYrBv8M4rr2f7rMCVv/V+fLX9z074n+qnrDwXMkN1+K06JevJL8IyDlOA= =5yn/ -----END PGP SIGNATURE-----