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-phpnuke_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 09:44:32 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 384e8aaae85650b1bb5c620605bdf44729706eee * md5sum be02aaea161d2624ac9290378ec5dfdf 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) iQEcBAABAgAGBQJSXl/5AAoJEIXCXpWhbrlNkf8IAOQX4q4TRu9cq8irgeRPOwfB 6uVk5JhawQzJwkUh4TxjTdFZAPvc4XweuP6DcC5OfU7+V2HAbHx5pHHn2+Oe3pnB pbXzKRnmCqDrcvvB1vZ9uI7oegm/LX1yvd22/e/mB35ajo2YyW9/OlekgAJhPmiL 07+fnQjZFMNArmZ7U1yjJClk1UbXct5j7Lp4c7pY0wHvDOZ1W2nhjhr2k5HPOOAI kPaj2jI3innYjr8CdN+E7I3KhC3e72k3PAZuX+QJOtH/yGIbCs3AEzBIafV06+JH il7PghUYbrKe0ppv93tW2sR+i6rYGjfa0z0P3Fxk2VNM29uytIeLdZXzPichl78= =w8he -----END PGP SIGNATURE-----