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-phpnuke-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 08:51:11 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 07a842aaf5faf49fdd40191f5f275a3933ea8327 * md5sum 3e32d7f27c099000b14636150983b65c 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) iQEcBAABAgAGBQJSMtH3AAoJEIXCXpWhbrlNA/cH/3IeWiiJCPOFu3vt25N4Q1lM Mv8He+0czPdaTid7kXloBJwdErW+CzFo708DfodBoUfaTE/O0FKQeq+NPtHMESPd 0UHDW6fWiMsqobcaVbKLjc33hvgX7P8noaIpoCS8mw4U1jzGXbeWZl0hLbUxUT2Q oDK0CLJeqX0OUa9Tjz+8uS/Bo3ayPU1lN+6KX9KElvTm0Fc7sFC4krvBDf5kGuFq GxwGkU8zDYYrubkC0BqoIMAYkRbv+H7FZM1y+8p102eeoYTWFnB04e/IGqyB12P7 yrRc7C3hpOIMVsi/XO1NR3+gUatzz7w84dyZxFOE6ImJ3uMkjpV2RXQC+Ef3hi8= =pYhD -----END PGP SIGNATURE-----