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-fileserver-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 11:44:58 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 1dacdf5f7d18ed69269be6fafeeb7742a154a801 * md5sum 5c187bafb19b8fba630851233af01f5f 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) iQEcBAABAgAGBQJQM3StAAoJEIXCXpWhbrlN1r4IAJKV3hgREaaVuGs33/H2OZR7 QAY+T5p7wj3XgIIsOi6Us41V4dT1vu9ZP05J7vIhxh0Fa9O9j6x/g8+sIUezFlg9 KtgzJjXpXgP4kg4CwnfIU45rK4tbR9kR1RzPEWJxr8fgHJb0dNX1WWfuMyibQ37+ u7M2Hp+WlUUMnlpJ/1lSbflzIp2oU6FePTU3QNuecdoJbf2oY1q5HqY68WdcbkVy U553TEHcxgrD3I74oUKAj/OWUW43rATsOfJ+gRbAZUKiLwzdkhmQluYlkftBgybh zun8Ag+rXTH2jpo2tib55vzHstrw4H/olJ7JSsfaBW98dkEsv+oIc/9o+FhV3sw= =+Qcm -----END PGP SIGNATURE-----