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-web2py-13.0rc2-wheezy-amd64.iso.sig gpg: Signature made Wed Aug 7 09:18:34 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum b6dc05b6f212919f80be91a6e17bda5c008b6547 * md5sum 3f2b97e9c057539d521c9fe8c8f94bcb 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) iQEcBAABAgAGBQJSAhDhAAoJEIXCXpWhbrlNcrgIAI2iRpuHnIc1cFpGJ8lwQrx5 aPNpVFnKj3F9CgVrPFO2OpBxfFnYzUDHGY0C6MyO30XaPhZThCTodn/tXsbCjC7m ogtGYXrZr+wiL2GMFenRARNDoxYNYoz79rmgGz+UMkiOkhrW7R2WK//iw16pIB0f LU7+HlbeKizCH+kQpzqFD1SvbY8nx5SE+xVYbFYWXcDj4/zJW3qkbLAl2Hek+uAS e+AqAerdXnwOCqKLPvFcZiNmm5d5kvP/EID1w7kft2cqRGZa8rcb0W9xAkWA47Xx bNkHMjlY1voKD0U+x386n0VFiWzqEcVqJkHrMKWEDZQom0g+tJqbadVTA2Xmdy0= =vDW6 -----END PGP SIGNATURE-----