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-oscommerce-12.1-squeeze-i386-vmdk.zip.sig gpg: Signature made Tue Jun 4 22:49:04 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 254797e09840d0385c56574dddcdaee470ad54cf * md5sum fc0596b1f7717652f8c2a58d310e6fcd 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) iQEbBAABAgAGBQJRrm7SAAoJEIXCXpWhbrlNUWAH91chHU+BBWnqYPwq9nsGXH9/ qd6pcxl9/9+PcdLAoqMQuIEYnmWDImsWfZw04McvmuaVObUlXRMFZo9q4C8oyejk ni49tc48m9wY8JXvegMRz/SqvRU1ilPJ5bK6YvNK0aVKo7EgsfU6mDx7WAF538ZV PJD2b+oiOWEM74eLcerk2pSmmoCAsM48crL6fETDtIHJGidQMUx2nnGJf4/oiHyE gKQBwR0q85fKLszhamsz7dcyxIPmiZWOBk7QdM3g/gToR44vxivpZaGvx5wLdBM6 w7gaxNy6fkqWKQpSNVna29BMsPFimaDGkJ6nEsHc/QK6FtkrLLkGBTjVhRBHrw== =QjM5 -----END PGP SIGNATURE-----