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 debian-6-turnkey-sugarcrm_12.1-1_amd64.tar.gz.sig gpg: Signature made Tue Jun 4 16:16:25 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum b17b3555a94c72386f500f83921a93294535787e * md5sum ffce5cb1a3fab10a216130c834a8cfaa 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) iQEcBAABAgAGBQJRrhLSAAoJEIXCXpWhbrlNieEIAOFYKtYIKHrGZR+5SfDSnJgg KZQSg7VavB9Jo4FWhoRWCG579mM1Fq1jETfM/RR1Dpw7K015vfwu2xncOv88kKRd loEZZWKl78h97X2GqV46prSUkUsRKCo+/vX9OeRj77Z7sn02owhicNSmMcicLy2R IzCfAkSttodWB3wIsJ/Ri3k9bwNxMwgjrWkf4AOQGLuEIGkzaY8fcTnBJcGe6hGX Rnd+h6Cu/M0/j9RQnDdpBJOgEJPgBhzQ0oy+/3GgcWtUljOl1nzVcY4p/5dC2iFp w1BOw0kaSxER6QjA5ZT5Dmm85N+jG0MQ9bFWlulvqu3IqmBOGw01u5mjzBzcE+s= =eCMb -----END PGP SIGNATURE-----