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-mysql-12.1-squeeze-i386-vmdk.zip.sig gpg: Signature made Tue Jun 4 22:25:15 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum f0aa9d72bcd81042267e70408604c2cd0f8901db * md5sum 8449c4759328795b19a9d1b327bc7de5 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) iQEcBAABAgAGBQJRrmlBAAoJEIXCXpWhbrlNCwsIAIYahPhXgOBksgjYeBaJsCEF dkEPJwYl3i6oHwnPOx5F/aJdPZsJG+7rCkpLgQGca2i6FOXinhFKxOxaoPimvL/s BdiLnJOjSstiwBx5LsuMO1UOON/5fJr8A4pIA8jTkTUxIeWYlGinxtk3+hqJpS8X 4FV0f+IiTSUej/ykETrBuD4WRSfSxlx1mkxWxg5p9ERvmMLN6qeGvmgAafcdCoKj qnUIaPaJMqRLspjV0rXn/nmF+H0e76fU+Wn8JovjDKkb44wtNBJhVMIApd/lKnAp m6ZeQS819/97EDgZw3xwWiJvslZonKWYxflOsB8a6zAbY/4jgDaVufJDiUT8nZ4= =7wEK -----END PGP SIGNATURE-----