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.iso.sig gpg: Signature made Mon Oct 14 17:12:21 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 484507bc8e609c45fd73adaf9ae74c536ef40de4 * md5sum ceb502dc4dc99f278e861827f7ede5ca 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) iQEcBAABAgAGBQJSXCXpAAoJEIXCXpWhbrlNAPIIAN2ADMsOQAPoSVeLGaPbi0hR Bo6eaGgjebcJU5MrA5z0Krprs5+mAFCihBr/KgaBDyEBYzCYseMMuR4RAn4D5NUp bglHec/swVHdUipU2mVFmm+gdd85NfW5AJd1AKPowthX11pzF3Bs6S8HdssMRCaY nNVFlVxfqTRogGM5bhkr9fwah2LlmX4gRUtsdYrV9MRTSpmvi738ALFviFEiJyhA guuLgW9AGsBl3+DdnWJlhBz91GzHzA4O037bMwRNL1vOssWo0iwHO7k9nU31tqI+ /H+TsaqJn+1z7C1+P5JzosB1w4NVaG4lfp3w2qrIO0dCbJh/FGYoLEqDR/4Z/YA= =KnDu -----END PGP SIGNATURE-----