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-ovf.zip.sig gpg: Signature made Tue Aug 21 11:45:12 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum f1322eccf112e99fd7b910b59994dc0f6efc08f1 * md5sum 4fd570c3dbacd63f3f042cef22fffa5d 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) iQEcBAABAgAGBQJQM3S6AAoJEIXCXpWhbrlNa38H/0iK8JyGBsJZ/hZW3bWKM6tf 7X8HcgMbliL5MHuyoCLnj0SGpkaU1TvfidxdoHhoK3/ZlNEx+mTr7eHenpyZxXLc dYjf5rrRgwtzNRH/XrjVIGj/Uu6VGeSKxg+zD5nB81MygR+w2aDxh5s+SVHDaKQD ojJTXIoxOc2+UPVswbu5EucSYssfmFdA9DuoVAyYmvqer9zY7QCkls5N6dPzyZ/F viCYbNQ1rwoyBYnX23XVFBTnK65Fhs1LRHN/5uDyIXltaa1Z1LkDX5GJW/KHoG+1 YFa887jXt5uKQKMqz4T+YVFs9xnSU93zKCiCajMdv+eg4fn1VUEY2PceeOTQXD4= =H//b -----END PGP SIGNATURE-----