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-projectpier-12.1-squeeze-i386-vmdk.zip.sig gpg: Signature made Tue Jun 4 23:25:28 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum a418b711e01d2f741a63605553fda28815f9e606 * md5sum 312c34fd601c609f85e1d95cc5f08b1e 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) iQEcBAABAgAGBQJRrndbAAoJEIXCXpWhbrlN/lIH/09Qgj+jsQmg4iWqyLuNH9SP EepBFZv13LvkEzip1HhxnaQ054sdY3zUD/4OrrjJB++lr2A9wuQREx1h0G9yQpg6 KjP1fPpyntrsWeRr6xc2WXDhdz2/9Hz2eTTD935cGoyFWHhRaxB5QDSAvVKPnJj7 EJcokzJQHEhg6y1HBiz4y3F+o0f9jVm2BJ3g7/PDyTBlxRXNBZMB/M7+o4ig87ZC dw2/O1nu5fBVr8vat0G8I3OX8FmqpzuPyfzti1T6EDR04zGedGIoGjLgQbUFYxug JNFV9w7f16i0gVYYq64x4rgk5bLIysloFvvAR0bU4UVIcyOeic+MQpqaUX/TblU= =Lv6H -----END PGP SIGNATURE-----