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-13.0-wheezy-i386-vmdk.zip.sig gpg: Signature made Tue Oct 15 15:55:07 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 6314fe79544d7f9ae1bb5f5423f000223f053a45 * md5sum 76d1c40c55611b479f2c241c17c43e8f 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) iQEcBAABAgAGBQJSXWVRAAoJEIXCXpWhbrlNdTkH/jD2oj3JfH+8m4DfWTBjN99O ztXO1lTlJOfNh6rZSbEtgcTGsT6og92DJuFqyCwXhVprYN92CovqLPTgqngDheQU G5UTclCbuvAXzhrTPKJAea8MmQgMxGJLxtWjOehSFWiXFGj9V8XmI5mQktsrEBn3 MXg24Zg/OvDBKG+HvQWcZViZT42rOduXC9guV2qEpipefSVb7LVL+5NWHbaBAY3X FiLKCHTlS30WpNGYC4vtpERy6Dp+zh7mlmDkXp5pGZXS6MHnFfNxqOAj/IJoV1Pe sVs281L3JGDwk80AFe64m2T1rZ6pF3N2paD/kP8j0gn1IdhdirmBqAMd5fJWzM0= =JV43 -----END PGP SIGNATURE-----