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-moinmoin-12.1-squeeze-i386.iso.sig gpg: Signature made Thu Apr 18 13:11:24 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum f5b032e323e96564f1c8431d9a9ad4335037797b * md5sum c15cd44b8ffa17c58095b732de44238a 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) iQEcBAABAgAGBQJRb/DzAAoJEIXCXpWhbrlNZtcIAKjhG79nLKM/saiiWRMZqBbj QnEWpOoBwDeRtzHMgbG6ublj9d+NhMKCMsSel59orfBXMxDy3PNQP37aWdAHx79/ vXVBtS1sDMCUx+C9C9osNswW7EgkjbSW6MLaMkYPztasqdi9gRGyuxf6BmHcijEw A6LoI2i8z7OuZ3pwYOt5lTk6HNxy8OY1+wZr3nrVXatQBLlV6ecQdbo/VszBZCX4 fnop9ffpY0nC+cVOuqRxDjwm2ag1Ww7+7wsumP0aQwFaYma941sRX4UlMd9sG7pE q31X0wLXSr2nns5mh0EQGNuetATkmIZUeFbUhfLTj6W+trajjMvC5JZMxwRFTM8= =UMfE -----END PGP SIGNATURE-----