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-cakephp-13.0-wheezy-i386.iso.sig gpg: Signature made Mon Oct 14 17:12:50 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum cf789d38ca3b5abd012dee2624db68d4ba26de1d * md5sum 9de6032389608d215a6c8cbfe61bc54c 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) iQEcBAABAgAGBQJSXCYHAAoJEIXCXpWhbrlNY8sH/AvRAOzWBUYW5xZnBblARO1v IS5ZIJZZdM7QviEOmX01B9JS0BCD1n+gH/RIGcCKm5CnlL/0SqprHXEbjiYeSWpo qNenkOXgQJv7B2SlMU+bXXJs+XW0U4uzxCQTNvX3R/E1hH8KisEWtUfbWjnz+TMH PGS4EkNID+FtwbdySoSEgcsmxA03KzWvQtZEsjoNj9LCNNIrXxWXozeki0GMWSDo S4M/1u/COinwCd8WARRfQt9Coxg4TKZQDGZJpccYzPv9jhEfX7IxT3f7fAB/iGe9 hAC8NXN8uPo30TSOyRq3/6UI53NTWJqEYza7SLX5YKw8Kp7vHtx+p97XXsMzc0M= =z6W5 -----END PGP SIGNATURE-----