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-codeigniter-13.0-wheezy-i386-ovf.zip.sig gpg: Signature made Tue Oct 15 15:16:51 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 5f91debaad7de9a58b3663dfbfcd52180545209c * md5sum b851d10af2933e25e88fe7079390141a 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) iQEcBAABAgAGBQJSXVxYAAoJEIXCXpWhbrlNN5kIAL28DWMvprU4b2I8CDnyRuAn bmUY+GeMc4wNiwH/96UPqBiuJC/37lOiKrRtYy6oACCxqrufc0ced4N4gY3npThR sjHyOTdAm7xDVtsC2HKrwzFESTu2OfEdI/XVvlx//rFIhgkKJj4kCjYorrRTFzd+ 8XQmIfT7IBrgudyw8K/+pb4SwhiZhM8PU/C+oE+Lj8YoyeE6yCjVesnErT88dILi 8UsAouPnhTdxC8RHUfT52Qc4TRrt+5c808vIGHCHKwIuzu4l+8j6ZfgUPYLmAScP 5qLsbtJAv7gnxpWI9Z3k+TwQw6MKHpp2xsuks4LnXdPV48kJlNm8wukpwaPH3nE= =nbx5 -----END PGP SIGNATURE-----