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-prestashop-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 09:08:27 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 302b7cbae3eb74922a2da2d85cfc3a9ae75d1d60 * md5sum cbe6b344fc11251ba73bc9d6dc6bebae 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) iQEcBAABAgAGBQJSMtYDAAoJEIXCXpWhbrlNVUIH/3cGagMQAXik74OJj3satKk3 df6eBBT5iJuhyFS3YeOF9OZ016SSKIVsmQJ7jScSVpf9pr5Qj7FTJtGT36v4HZB/ T/Mc9Wp796CA8WJQLHUdLpj02gwBFFPOH4Z1fhhIhrzPu90LXq+6a/M77S5LaE1K IalYs2O4LorS6Xte6z4/rg9csRV0IP8i4/QkF7Y/Fih0hLDjmPyhKedKZicp7nsa VDAKPCWr6KEnPv0HxKacwvI2ZIxYxnK0KjcRzARKKF/OGex9qhfJbujRIOkFPSi+ QB1uGlJEqnUa9Y34GitNADnpDAEU9NXO+XitFgSjNEuWUk/pCnH9pYgP6xrfXSE= =9tTb -----END PGP SIGNATURE-----