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-sugarcrm-12.1-squeeze-i386-openstack.tar.gz.sig gpg: Signature made Wed Jun 5 00:38:13 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 88b5278cb6d26ccfadb95943f7b4eb338b1550df * md5sum 631612943d82f103e0fd02ce967c58eb 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) iQEcBAABAgAGBQJRrohnAAoJEIXCXpWhbrlNe/gIANIUZn8xmdkXnGOMDKZuMOPH OWnXh3UOXUbeV242+3XS+MURIHKuCbRR56PNhYBbj7aNssVFXQA+5b1ifhlFp1cQ fDCJ8OxoYCDnl1HJ5sjNXjqnYxxBu0KCZsQKANV440wh8+ELKxX6IS8ERuf0TFTG lnA0Om79HFI1lFfmMzfou9l6aXvsnKdqLThRdVmDnRLk5YZKj9+F9Lvj9oF5W69O jTKD8KI+vcLBkxlBeqFiT/kzPRn8e2MmsH1KBF6ijSdpd+CQn17Za4WiiTohZeuE 1+oHkH5Vt2RrS/lhJdwtIA5/nlgEaH6bXfN1ALgscjABkf8nFXJkBO8lCfXSHZc= =7Zo6 -----END PGP SIGNATURE-----