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-symfony-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 16:53:26 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum ff48b71c3fd5301818e0e7ec1f33497978bf3539 * md5sum 28992f831210265802121653c33b9106 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) iQEcBAABAgAGBQJSXXL8AAoJEIXCXpWhbrlN8yEIAJNMV09xku5LchMUtH+/bTew THs/PpxEx+D3QH4XsIkbxML7sEdBmj6foTb54v9KfDYM2PO0qpqoon/K1szdM7br NUKfoIwcKiKE0/Mv2Gl2UmnsMIEwmRvFjOZtxTDzqiWSZ/HLVKqsLI3d56+nMlZU dtvUl8102ByBvqiksURQ9//PWe/sEPEe+2rGdtyT92yGC2HPz3nOeB6Ccr+0/4vG QHljGlwbFzz8sWj/V9SQJ3U4gsozaTbtZfSkLRGVWmDGlGcQmskSEMCX3yeKUEPk bS7iF38nuO5zxxkDEtAXBE6zPMaG7el6M/hxSshnBIgq6ZWZWKsRHB6gZ3gkwgQ= =6dH5 -----END PGP SIGNATURE-----