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-phplist-12.0-squeeze-x86-openstack.tar.gz.sig gpg: Signature made Tue Aug 21 16:19:11 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 63225c5e4ceb30ae3efc6321caba0a271144908a * md5sum 6ede60ccb505ca01ab1c37595844095b 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJQM7T1AAoJEIXCXpWhbrlNrY4H/0vKxdd8OmVQyxWb/RVLrnm7 MNJfwMjZJiupn549qCr/P7/5ZrXduYSZZ4dDjpq0G0BtoQBn/Yhzvh4BZwbKuRGQ 93h7X9UITijF5duhucxFIYPOKMzPp3TJPcg4qHZpBo47xR1A+S6o/jRvS8lvvKuk aB0FEnvWdGwDYO/bbvg3m7V7lC8jSkQMZXy1XPMENm5ImeOv4Opo/mom1RflbLHE Q5caK8h3ZE02UcldYrGkuuHNWozs9OGZU0/C8KQQZ7hWGDaDRe9guQolA3tyqyhI v75nbE3lL7Izg7OKCzOJ3/jSIdmmcCYuZuaOPoyG93bIC7eafklmYxwxHDWNCfI= =lMl9 -----END PGP SIGNATURE-----