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-icescrum-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Mon Sep 16 14:46:00 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 86d58467fac89edff570f95a97b261a480535fd1 * md5sum f8d99cfa78d5ed379d069289dc378829 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) iQEcBAABAgAGBQJSNxmZAAoJEIXCXpWhbrlNoAAH/Ahy5VCaToE/2qylFJL978j5 5MEqunryxFLEj6pMJpJopdf01wGukD53BYYyXpYl523jSfazknTxfZZrxxFSHUOs zEHhLN2clV4lOnZhj9X48ug32gUiIqSUSja0U9VeN4dTq3ChSjTYSBhyjZMUXbL0 GWtg82JQeN24TFV4bAeA/qpiB8Bwshy5BVDSm3EJyvPSaS3cdWaitODt3N5F/GHw 0SyhlSUb2d7XuhwbbbwUBNcyR40ZMUlzbzInjC6kK41eaKpWfQEEgUmkFQjqdc5O tiIhBtl9L8XzFOsvcv60u5NqFfhT85sza/Cqk5bbPN2kpM9iW781OTizDE1I6MA= =uFBT -----END PGP SIGNATURE-----