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-icescrum-13.0-wheezy-amd64-ovf.zip.sig gpg: Signature made Wed Oct 16 08:47:37 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 1ce579a7a0eb96e291c174c498b99e5cd6b97300 * md5sum 078c286ae47f27db4eac6897e376252c 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) iQEcBAABAgAGBQJSXlKXAAoJEIXCXpWhbrlN2/IIALp507pmjhlxVSpKEvAbOQo5 hEJ+fx3fqPyrKLOcUjXq+VACOHhGIszW7wKItWI52UEJQRpJiDEad8fHbX6J1Q1f B4ETCV0wT6mxJi4Q9RSE2e7qFVEoI3UXFEatYL2Apf1ag5YabRSW9QevlUNFmnPN QuILUrXS6ry7ul8DE/c3vRgUJ03tcOIJjgOOTW8x+hMB3PBLNVbbfh3XGPWYGhGB unQbMn14ByumVZZRzgw1FiK1X3ToD2pyb8GK7+GR+sUb/FnOaDaPr0rEx4wwmCdk 1ojlzEif9ARaERxvOZf1Na3LdW2XpRhdd5R8dsXkHy1NBFp181RbCUkXTirXhMM= =4RH0 -----END PGP SIGNATURE-----