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-amd64-vmdk.zip.sig gpg: Signature made Tue Jun 4 16:13:07 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 38e31ad6c68800067584febd9afe396f9f0d727e * md5sum c36821498d197d901c07dc0243b4b0e7 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) iQEcBAABAgAGBQJRrhIJAAoJEIXCXpWhbrlN1kkH/15250suJv+IoMFWQJZWW9XN NNrD44l0yQPSHq7NctdnrSrxAyLlzHaPjj10yEnTjSsnLNgFYyXuv12FeAjGQgFd JGo/LSCX53azrQWLtnQef43hmRReNKz50yUMVMARq3Xdmi7vassHPFthXCYno7Sl zmc+Y0jkW/kxmc1pytDekOSF1hm8xiTXkljC5Dnxl5DKBxRbSsmAgTfRhocNWVNS 1Agt+G2lx7SpF58VxletPe/yKHd267vUHE51qWu+XXa5ZETVwy3CeKVlzG+CNh4I /hvM5j4pWQZQR//QAH4BUCsDKa4gADAqrWlgRmuIzzilmD82NQOL5k38ojHRZUo= =YvOA -----END PGP SIGNATURE-----