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-tracks-12.1-squeeze-amd64-vmdk.zip.sig gpg: Signature made Tue Jun 4 16:38:05 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum f036a64fce19b7a47f55ed1644c2cac54058b3dc * md5sum dc34de8b4ae9ec5577fd3093933ff3ef 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) iQEcBAABAgAGBQJRrhfiAAoJEIXCXpWhbrlNGSYIAIXUuURlZidHoXG87Cj6P6qf f03orXt5L40lHDwrSIQmtOAS3lmjz68G4KwvIHduxrQWjC6ODiSt5Xl6ULIUx+AY 5rYsPVNzDeWDMOOLQ/QM9MpgewH4nItPgNG39XQp0rpPl3JvsDcZFSWN/uZZ4pPk lzJUzgzMZ0iP8ZyoWUWBVk452/0/eujU8XzGLpdlN54jeH+mH8vtdSs3U34gTSK/ u0ydTbHPnskP6nRTDDklXDvc6+zupvr4bCHvgGrzrLj7KZwv/6kgl645NRpDys8b g5hm9YtoJG+4I/U02BbSIos3TNPoP9T1p2W5aAmdSRtMixaCYnQaWr/7uh4kNvo= =/Jvc -----END PGP SIGNATURE-----