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-tomatocart-13.0-wheezy-i386.iso.sig gpg: Signature made Mon Oct 14 19:19:14 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 87e0d0f38cd992088de5978eefb18d2833d6b4f2 * md5sum a6db853fb97fed409f15b1d77e9c829f 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) iQEcBAABAgAGBQJSXEOmAAoJEIXCXpWhbrlNBA4H/jawuZszMhWbnwQ8PiBr0Bki 9AOrSGNOw7r1MXwg7Mnpm0c+FyaurgWpOOWo+IB/kMOPFca7Xt+X1UD0nN+2OY/a hKukDcpp55J6Bqb4NjU/q7zHc63xkQD9p+qEYEdSrCjUQkppkBGj2Jlcg2LVPEb7 Jqlb9hIjqV2NTmJBXjMzPyBChF+eUj2G7w7QSubo9j0ZpQWUqhV4acrbh9QLNCmx olLH1kK6Gi9V1T/1Q0eqM2/VxQvun0XXvyKOyI30CYPsGRPaFqswORikom0ejUrJ fALhWq6909819yap9EhFiICErLG6mvcPusr8mXR4J6sWf3IS4AWoUQVI8xLsFPk= =paDH -----END PGP SIGNATURE-----