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-osqa-12.1-squeeze-amd64-ovf.zip.sig gpg: Signature made Tue Jun 4 14:56:51 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 86dbdf2287c318521834b076a263778a787331e9 * md5sum 439a91ccb914d5143b06343660b2f34e 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) iQEcBAABAgAGBQJRrgApAAoJEIXCXpWhbrlNmh0H/jRVa0f2981lWY13NZXYucV8 CjYNkKnMyYydAzj3gFtLg8ZcfYrrCyozU0Ls7jMt9gNQAbOPcQ7bRVwe5BNlluk7 lTFtIHtZ8DgXMVHOr1hq+da2i+jQCyhAukEPjjFHUGRwfP04REbxk6u3WPloZVZq 3bZvWI7cKHttyPX5+4Ia6bCL716AbWizhrRYFl/JHfn1ZbeL1Mj4PAq4OrXdmU8Y l8Di8A7Y6XpVKnfCdl5oCCAhxKTVNmB4wo0BbyrbrWaTfPRCz4apw+oVgVBu/HK8 wL725c+UaeNQKIUaegnPmofC3/IMYhC5YSWGROtHcgJi70JuPuo95gfTepU1jwQ= =UrCu -----END PGP SIGNATURE-----