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-punbb-12.1-squeeze-amd64-ovf.zip.sig gpg: Signature made Tue Jun 4 15:28:21 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 81b24027dd95ae8137a6b77bc5f342f5111ae353 * md5sum 8c5e9593725b4ea4084ae5dc45513ef7 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) iQEcBAABAgAGBQJRrgeLAAoJEIXCXpWhbrlNuSAIAOaj3BqbM+lYFSExX1xRbEC2 sIFdUaEkoU07fRvWoQfyc1hPW9NyoVoVTEc+7FeuRh0tIwha403CSg4J1M2dUVR/ cQjZYqHaC0D1jmV+T/DZKSpV3hW+JqVm/2kX6VoUieg3qSUW5mTEos0CeNB+K8Yb kyXtb9mSlp/BIsPbglFlT+ypVe2SXIVGCBX97N7y9ef8RScy6qZcPc3bxBzCuep7 Y+t7OLIpK53UQWx44w+G4pLsi/fBq79LYuViiUgoePb1AJuKPj0GZpfUrYn51Z8K lLcibQcbxlwfq4kVOCfwsveDqGKv3GU9NgaX9xazICHmd8/0+BVxI2+0GbZUFFc= =B14U -----END PGP SIGNATURE-----