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-statusnet-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 09:21:42 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 545e3cdcd2e21508830fc32d512b36044ef29acf * md5sum 63e69c2ac0982c6db14cb00fb01a032f 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) iQEcBAABAgAGBQJSMtkfAAoJEIXCXpWhbrlNb28IAIq3Jmc8wcaLe1K/iZigteIT +2pSkgTNAU+KkjCG0LtorMz33dxFxS81UJxYwZJ6/2kALJLXkDXgSoJwi2Sp61Px JgdUoNVAPIpBGnJ3nfVWkgU8V1IwST2W+4BuGKbcFPBugVsZQBxoJ4BmEuNtjf7M Afsuio6o8fhMgMtHvpCeXnI81JiYvM+oCEV4U5VnEZ7PWYG7nDuAuqlkFq3X7c4H 32u+fK1WGb0k8pDjqKXL/qDlokvXjne9C4xaxuekY1XRvGdiRB/dks+beqQDGiKq 8Sxvi8GNfQQlmg9QQ1gO1BrncIsSc0Q1W1k4NB9OHrnzAZb5fbUKIPFi05BbTps= =5GNO -----END PGP SIGNATURE-----