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-13.0-wheezy-i386-openstack.tar.gz.sig gpg: Signature made Tue Oct 15 19:15:20 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum a47f9307655c451d54d290384bd11c1fd7d18059 * md5sum ba7f1f8c69b13049cbf3076a45bc5950 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) iQEcBAABAgAGBQJSXZQ/AAoJEIXCXpWhbrlNED0IAKueHQ+HYnNgOqtKFJWRWw68 SLB3Na82DpkCcScnDDOSSyNEUh+eppyspfVNQ/RgBWcHR4aCYVdMKZCyLKOhYsZ6 Kb1ALH3F+A24f465KzIqnycr3fmDTBQAh5yf6LofUq+KKXNwydnchoA9fICv3F6J sYZ/Cl7AW1t0YvNSNXx0sDA91qvnmqbaDF62XmDUXlcEoajwckQv1ihxLnubV4Ru WsgJlZsZ6WMvgAG4iuo3IKloAM8s0hgQPp6xl+P0aRiLctKAi9tPB69zsHYPcdlQ pO2tMgt5XAGGXuo/ViGjVEAo2hZ1fIBikAS43XWQyj2iYrHkbG11MEFU2Bh3lMY= =PmcB -----END PGP SIGNATURE-----