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-mantis-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 15:36:26 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 04880c9e91355d3227c3fcc1f68b0852b1f20f3b * md5sum 13704a939fec6bb90148405008340f1b 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) iQEcBAABAgAGBQJSXWDwAAoJEIXCXpWhbrlNEFEIAK9e3113xO2RMAXSYld0XsRU BDA71KQy9l8GAQEh66zgvFeA+dsSVExdeMchhDGjYZBUAgRG56lZaamHflD3DcOi NrjY3X/uEVayjSQQS/4DpndNNbsUdMmmw5hA+e1NpNWQDmALTnOeOfhTqIdR1lb3 L6klyGIT4D9ZJlplnO45jBaA3Es362pYRFtPFJ32/In9jCo8V5ZMSihgYEjLydap Wftelqba+tzC/oHQfMp5oaDcw2NU80LW0rTtyoR/tMqH44bjkZ+Fuxej6oFxMucw Yw+5ML8eJKkLcouBCoS+Dmp3lsHWmqWuQyKUCEJj6YrUDGN4uj6pLgN1+2macww= =mFXD -----END PGP SIGNATURE-----